Florida Manufacturer Ogura Clutch Representatives, RCS & Associates

Ogura's industrial electromagnetic clutches, electromagnetic brakes and clutch brakes offer something for every application.

OGURA CLUTCH IS A CUTTING EDGE LEADING MANUFACTURER OF ELECTROCMAGNETIC BRAKES AND CLUTCHES

OGURA CLUTCH & BRAKES LEADING THE INDUSTRY WITH THEIR EVER GROWING PRODUCT OFFERINGS

Ogura's industrial electromagnetic clutches, electromagnetic brakes and clutch brakes offer something for every application.

Industrial Grade Brakes, and Clutches Overview

Ogura's industrial electromagnetic clutches, electromagnetic brakes and clutch brakes are used in a wide range of high speed, high cycle rate, and long lasting machines. You can find Ogura's products in packaging machines, food & beverage processing equipment, and industrial mixers.

Ogura's magnetic particle hysteresis slip clutches, and brakes are used in a variety of tension control systems. These systems regulate the winding, and unwinding of fabric, carbon fiber and other materials during these cycles. Ogura's particle clutches, and brakes are now used in digital high resolution sign making, and photography printing industries. Many of Ogura's designs are interchangeable with brands such as: Warner Electric, DynCorp, KEB, Electroid, Lenze, Deltran, Intorq, and Matrix. This allows for easy location, and replacement of these manufacturing parts.

Ogura's spring applied power off brakes, also known as spring set brakes, are used in many industrial applications including: mobile, medical, robotic, and amusement park ride speed control. The spring applied power off brakes can also be found in electric wind generators, and turbines.

Oguras industrial electric brakes are used in many applications such as: rail road crossing gates, parking lot/toll gates, mailing machines, mail sorters, and semiconductor processing applications. Electric tooth, electromagnetic tooth, and electric multiple disc clutches are used for high torque applications in tight quarters. This requirement includes machine tool manufacturers, NC machines, lathes, milling machines, and many others. They are used in the manufacturing of AC and DC electric motors, brake motors, brushless DC, and servo motors.

Industrial applications for Ogura's well known high reliability brakes include: overhead doors, cranes, marine, construction equipment, brakes, and even noise reduction dependent theatrical stages. Availability for manual release levers, or emergency release mechanisms are optional for many of these products if requested by the customer. Ogura also offers a robust line of x-ray machine brakes, and conveyor clutches. Ogura's copy machine and PM hysteresis clutches are used in all major manufacturers of copy and printing machines. This is attributed to Ogura's ecenomical price, high torque, longevity, and zero maintenance.

Industrial Grade Brakes, and Clutches Overview

Industrial Grade Brakes and Clutches

Ogura's electromagnetic clutch uses a single plate friction surface design that engages both the input and output members of the clutch. This type of clutch is used in a variety of industrial applications from copy machines to conveyor drives. This is the most common type of electromechanical clutch. These clutches are found in the packaging, printing, food & beverage processing and factory automation industries.

HOW IT WORKS

Engagement:

Electromechanical clutches operate by use of electrical actuation. However torque is actuated mechanically. When the clutch is required, electrical current passes into the clutches' coil. The coil then becomes an electromagnet which produces magnetic streams of flux. The flux is then transferred through a small air gap between the electromagnetic field, and the rotor. The rotor then becomes magnetized and establishes a magnetic loop attracting the armature. The armature is then pulled against the rotor. This creates frictional force that is applied at the point of contact. After a short time, the load is synced to match the speed of the rotor. This engages the armature, and the output hub of the clutch. In most cases, the rotor is constantly rotating with the input at all times.

Disengagement:

When electrical current is no longer present the clutch frees the armature to turn with the shaft. In most clutch designs a spring holds the armature away from the rotor surface when there is no electrical current present, thus creating a small air gap.

Cycling:

Cycling occurs by turning the electrical current to the coil on and off. Clutch slippage should only occur during acceleration. When the clutch is fully engaged, there should be no slipping as long as the clutch is sized properly. If settings are true, torque transfer is 100% efficient.

OGURA INDUSTRIAL ELECTROMAGNETIC CLUTCH FEATURES

Zero backlash armature available on some units:

A special leaf spring mounts the armature to the hub proding minimal backlash.

Automatic air gap available on some units:

Clutch air gap adjusts itself as the clutch wears, keeping a consistent air gap that maintains engagement time.

Fast Response:

The single friction plate design allows for a very fast response in high cycle applications.

Smooth & quiet operation:

Clutch armatures engage smoothly, eliminating clutch chatter sustaining quiet operation.

Ogura's electromagnetic brakes uses a single plate friction surface design that engages both the input and output members of the brake. This type of brake is used in a variety of industrial applications from copy machines to conveyor drives. This is the most common type of electromechanical brake. These brakes are found in the packaging, printing, food & beverage processing and factory automation industries.

HOW IT WORKS

Engagement:

Ogura electromechanical brakes operate via an electrical actuation. The torque is mechanically induced. When electrical current is applied, the coil becomes energized creating a magnetic field. This turns the coil into an electromagnet that develops magnetic streams of flux. The magnetic flux then attracts the armature to the face of the brake. The armature and hub are usually mounted on the customer supplied rotating shaft. Since the brake coil is mounted solidly, the brake armature, hub and shaft come to a stop in a short amount of time.

Disengagement:

When electrical current is removed from the brake, the armature is free to turn with the shaft. Most designs, require springs that hold the armature away from the brake surface when current is no longer present, thus creating a small air gap.

Cycling:

Cycling happens by turning the electrical current signal to the coil on and off. Slippage only occurs during deceleration. When the brake is engaged, no slippage should occur once the brake comes to full stop.

OGURA INDUSTRIAL ELECTROMAGNETIC BRAKE FEATURES

Zero backlash armature available on some units:

A special leaf spring mounts the armature to the hub proding minimal backlash.

Automatic air gap available on some units:

Brake air gap adjusts itself as the brake wears, keeping a consistent air gap that maintains engagement time.

Fast Response:

The single friction plate design allows for a very fast response in high cycle applications.

Smooth & quiet operation:

Brake armatures engage smoothly, eliminating brake chatter sustaining quiet operation.

Ogura's power off brakes are used to stop and or hold a load when electrical power is either lost accidentally, or intentionally disconnected. These brake types have somtimes been referred as "fail safe" brakes. They are typically installed on or near an electric motor. Applications include: robotics, holding brakes for Z axis ball screws, and holding brakes for servo motors. Many custom designs can be made for use with different motor types and applications.

HOW IT WORKS

Engagement:

When electricity is not applied to the brake, a series of springs thrust against the pressure plate, thus causing the friction disk to squeeze the inner pressure plate and the outer cover plate together. This frictional clamping force is then transferred to the hub mounted onto the customer supplied shaft.

The power off brake is not engaged when power is not present. This brake type is typically required to hold or stop a load in the event of a power loss, or when power is not available to run a machine.

Disengagement:

When the power off type brake is required to release, electrical current is applied to the brake's coil creating a magnetic field. This magnetic field draws in the pressure plate pulling against the springs, creating an air gap between the pressure plate and the friction disk. This allows the assembly to freely turn with the shaft.

OGURA INDUSTRIAL ELECTROMAGNETIC POWER OFF BRAKE FEATURES

Small profile:

High torque needed in a small package is what this brake was designed for.

Zero backlash option:

Some of the designs have a zero backlash hub. This can be critical in registration type applications.

Fast Response Time:

Most units, are equipped with a series of coil springs, thus minimizing pressure plate travel.

Multiple voltage availability:

Depending upon the brake size required, 24, 45 and 90 volt models are available. Brake model voltages can be modified to meet your special requirements.

Ogura's multiple disk clutches deliver extremely high torque in small displacement requirements. These clutches can be used in wet or dry conditions. This makes them an ideal choice when running multiple speed gear box applications requiring cooling and washdown. The machine tool industry tops the list where these clutches are used.

HOW IT WORKS

Engagement:

Electromechanical clutches operate when electrical current is present. Torque is mechanically transmitted. When electric current is applied to the clutch coil, the coil becomes an electromagnet. This produces magnetic streams of flux. This flux is then sent through a small air gap between the electromagnetic field and the rotor. This results in the rotor portion of the clutch to become magnetized. This then sets up a magnetic loop, which attracts both the armature, and the friction disks. This magnetic attraction of the armature compresses the friction disks, and transfers the torque from the inner driver to the outer disks. In order for the unit to be used as a clutch, a drive hub is required. This hub would be attached to a pulley, sprocket or coupling. After short period of time, the load is accelerated to match the speed of the rotor, thus engaging the armature, and the output portion of the clutch.

Disengagement:

When electric current is removed from the clutch, the armature is then free to turn on the shaft. Springs retain the armature away from the rotor surface when power is no longer present, creating minimal drag.

Cycling:

Cycling is achieved by turning the the electrical signal to the coil on and off. Slippage should only occur during acceleration. When the clutch is fully engaged, there should be zero slippage if the clutch is sized properly. Torque transfer is 100% efficient.

OGURA INDUSTRIAL MULTIPLE DISC ELECTROMAGNETIC CLUTCH FEATURES

Small profile:

High torque needed in a small package is what this clutch was designed for.

Wet or dry application:

These clutches can be used in wet and dry enviornments.

Fast Response (wet):

For quick response times in wet environments, special channels are cut into the friction disks to allow oil to flow faster.

High heat dissipation (wet):

In oil environments, oil is used to take heat away from friction disks for better heat dissipation.

Ogura's multiple disk Brakes deliver extremely high torque in small displacement requirements. These brakes can be used in wet or dry conditions. This makes them an ideal choice when running multiple speed gear box applications requiring cooling and washdown. The machine tool industry tops the list where these brakes are used.

HOW IT WORKS

Engagement:

Electromechanical brakes operate by electric actuation, but they transmit the torque mechanically. When power is applied to the coil, it creates a magnetic field. This turns the brake's coil into an electromagnet, which develops magnetic streams of flux. The magnetic flux attracts the armature to the face of the brake. This squeezes the inner and outer friction disks of the brake together. The armature and hub are usually mounted to the customer supplied rotating shaft. Since the brake's coil is mounted solidly to the shaft, the brake's armature, hub, and shaft come to a stop in a very short amount of time.

Disengagement:

When electric current is removed from the brake, the armature is then free to turn on the shaft. Springs retain the armature away from the rotor surface when power is no longer present, creating minimal drag.

Cycling:

Cycling is achieved by turning the the electrical signal to the coil on and off. Slippage should only occur during acceleration. When the brake is fully engaged, there is should be zero slippage once the brake comes to full stop.

OGURA INDUSTRIAL MULTIPLE DISC ELECTROMAGNETIC BRAKE FEATURES

Small profile:

High torque needed in a small package is what this brake was designed for.

Wet or dry application:

These brakes can be used in an oil cooled gear box environment or (wet), and as a stand alone brake (dry).

Fast Response (wet):

Fast response is accomplished with special channels that are cut into the friction disks allowing the oil to flow faster.

High heat dissipation (wet):

In oil environments, oil is used to take heat away from friction disks for better heat dissipation.

Ogura's electromagnetic tooth clutches yield the highest torque capacity in the smallest of packages. Due to the clutches' available zero backlash feature, makes them ideal for printing applications where there are a number of stations requiring them to be timed together. On occasion they are required to disengage printing applications all at the same time. These cluctch assemblies can be made for a single position option allowing precise timing. Tooth type clutches are also a great choice for applications that engage at very low rpms. Tooth type clutches are also ideal for gear boxes, and machine tool applications.

Engagement:

Obura's electromechanical tooth clutches operate by electric actuation. The transmission of torque occurs mechanically. When electrical current is applied to the clutch coil, the coil becomes an electromagnet. This produces magnetic streams of flux. This flux is then transferred through the small air gap between the electromagnetic field and the clutch rotor. The rotor portion of the clutch becomes magnetized, and creates a magnetic loop attracting the armature teeth to the clutch rotor's teeth. In most case, the rotor constantly rotates with the input drive. At the time the clutch armature and rotor are engaged, lock up is 100%. Due to this instantaneous engagement, tooth type clutches cannot be engaged over 50 rpm.

Disengagement:

When the electrical signal is removed from the clutch, the armature is released allowing the clutch to spin with the shaft. Springs hold the armature away from the clutch rotor surface when power is no longer present. This then creates a small air gap between the armature and the clutch rotor.

Cycling:

Cycling happens by applying and releasing electrical current to the clutches' coil. When the clutch has power applied to it, this creates non-slippage, and Torque transfer is 100% efficient.

OGURA INDUSTRIAL TOOTH CLUTCH FEATURES

High torque/compact design:

High torque needed in a small package is what this clutch was designed for.

Single position style available:

As an option, Ogura's tooth clutches can offer single position for precision registered applications.

No slip:

Ogura's tooth type clutches are tooth torque driven. Slippage is non-existent when clutch is engaged.

Zero backlash:

Optionally, the tooth profile can be customized producing zero backlash when clutch is engaged.

Zero drag torque:

There is zero torque drag while the clutch is in the disengaged position. This is due to the teeth not having contact with the clutch.

Wet or dry applications:

Ogura's tooth type clutches can be used in either an oil cooled gear box or dry applications.

Ogura's magnetic particle clutches have a unique design from other electromechanical clutches. This type of clutch has a wide operating range of torque capacities. Like an electromechanical clutch, torque to voltage is almost 100% linear. The magnetic particle clutches' torque can be controlled very accurately within it's operating rpm range. This makes these clutches ideal for: tension control applications, such as wire winding, foil and film, and tape tension control. Due to the clutches' fast response, they can also be used in high cycling (on/off) applications. These applications include magnetic card readers, sorting machines, and labeling equipment.

Engagement:

Obura's magnetic particles are similar to iron filings. These particles are located in the powder cavity. When a current is not present, the particles sit within this cavity. When current is applied to the coil, magnetic flux that is then created. This current then is used to bind the particles together. As the current is increased the magnetic field builds, strengthening the bind of the particles to the clutch rotor. This then creates drag between the input and output of the clutch during rotation. Depending on torque requirements, the output and the input may lock up, and torque transfer is 100%.

Disengagement:

When power is removed from the clutch, the input is free to turn with the customer supplied shaft. Since magnetic particle powder is in the cavity, all magnetic particle clutches have some minimum drag associated with them.

Cycling:

Cycling occurs by turning the power to the clutch coil on and off. Slippage will only occur during acceleration. When the clutch has power applied to it, there is no slippage if the clutch is sized properly, unless slippage is desired. Torque transfer is 100% efficient.

OGURA ECTROMAGNETIC PARTICLE CLUTCH FEATURES

Fast response and accurate control:

Voltage to torque ratio is almost linear. Engagement is extremely fast, and control of magnetic particle clutches is very accurate.

Stable torque:

Torque is proportional to the current applied to the clutches electromagnetic field, allowing stable torque throughout the clutches operating rpm range.

Long life:

Slippage is non-existent when clutch is engaged due to its tooth style design.

Excellent slip capacity:

Optionally, the tooth profile can be customized producing zero backlash when clutch is engaged.

Zero drag torque:

Due to the clutches' excellent heat dissipation, and construction, they can operate in a constant slip mode within maximum allowable wattage. This makes these clutches ideal for tension controlling applications.

Ogura's Magnetic particle current actuated brakes are unique in their design from other electromechanical brakes. Due to the wide operating torque ranges available, this brake's design stands up to the competition. Like an electromechanical brake, the torque to electrical current ratio is almost linear at speed. In a magnetic particle brake, torque can be controlled very accurately within the brake's operatational rpm range. This makes these brake units a great choice for tension control applications. These applications include wire winding, foil and film tension, and tape tension control. Due to the brakes fast response design, this type of brake is also used in high cycle, or (on/off) applications. Applications include: magnetic card readers, sorting machines and labeling equipment to name a few.

Engagement:

Ogura's magnetic particle clutches utilize particles similar to iron filings. These particles are located in the brake's powder cavity. Without any electrical current present, these particles sit in the brake's cavity awaiting current. When power is applied to the brake's coil, this creates magnetic flux as the particles become energized. As voltage is increased, the binding of the particles becomes stronger. The brake rotor passes through these binding particles, and applies the brake output of the housing to some portion of the machine the brake is attached to. The particles start binding more aggressively as more power is applied. The resulting resistant force is created on the rotor slowing, and eventually stopping the output shaft.

Disengagement:

When power is removed from the brake, the input is free to turn with the shaft. While having magnetic particle powder in the brakes cavity, all magnetic particle units have some type of mild drag associated with this brake design.

Cycling:

Cycling occurs by turning the power to the brake on and off.

OGURA ECTROMAGNETIC PARTICLE BRAKE FEATURES

Fast response and accurate control:

Voltage to torque ratio is almost linear. Engagement is extremely fast, and control of magnetic particle brakes is very accurate.

Stable torque:

Torque is proportional to the current applied to the brake, allowing stable torque throughout the brake's operational operating rpm range.

Long life:

Because the wear rate of magnetic particles is a slow process, the brake design offers a very long life.

Excellent slip capacity:

Because of the brake's excellent heat dissipation, and robust construction, they are able to operate in a constant slippage mode within the brake's maximum allowable wattage. This makes them ideal for tension controlling applications.

Depending upon the method of mounting used, these brake and clutch units, can function as both a clutch and brake. Torque is applied magnetically, but is a function of the unit's mechanical setting. Each of these units have an individual pre-designated torque range. Once that torque range is set, the torque is generally stable. Regardless of the speed within the unit's speed range, these units are suitable for tension control applications. Paper, film, foil, wire, and other material tensions can be easily controlled using this design. These units do not require a power supply making them extremely cost effective. Applications include but not limited to: motor test stands, small wire winding, bottle cap machinery, and labeling equipment. These units are sealed, and do not develop wear particles. They are also used in medical equipment, and office automation machinery that requires control for paper tension. Not needing power makes these units cost effective in office automation, and many other types of tension control applications.

Function:

Most of these units contain a hysteresis disk, which is directly attached to the hub that passes through the clutch/brake's assembly. Two round multi-pole magnets are solidly attached internally within these units. The magnets face each other with the hysteresis disk between them. There is an air gap between the magnets and the hysteresis disk. This hysteresis disk design, can turn without any frictional contact. The opposing circular magnets set up magnetic field, which causes drag on the hysteresis disk, which in turn creates drag to the hollow hub in the unit.

To increase or decrease the amount of drag output, these units can be manually adjusted. As the magnet poles are aligned north to south with one another, they produce the maximum amount of drag on the hysteresis disk. As the poles are changed from a north to south alignment, the electromanetic field passes directly through the hysteresis disk's material. This reduces the amount of drag/slippage on the hollow hub of the unit.

OGURA HYSTERESIS PERMANENT MAGNET CLUTCHES AND BRAKE FEATURES

No electrical power needed:

Permanent magnet hysteresis units require no form of external power, making them independent from power fluctuations.

No contamination:

Having no wearable parts, and being sealed from the factory, does not allow contamination to your machine.

Long life:

Because the wear rate of magnetic particles is a slow process, the brake design offers a very long life.

Stable torque:

Consistent torque is maintained regardless of the predetermined slip speed. This is due to the hysteresis principles these units are designed from.

Minimal stick slip:

The fact that torque is transmitted magnetically, results in no friction from which to break away from. This means that both static, and dynamic torques are almost the same.

Electrical hysteresis clutches have an extremely wide torque range. These units can be also be controlled remotely, making them ideal for test stand applications where variances in torque are required. These units offer minimal drag in torque, thus allowing these units to have widest available torque range of any of the hysteresis products. These units are mostly found in test stand applications requiring strong, and precise torque control.

Engagement:

When the power is applied to the clutch field, it creates magnetic flux. This flux passes into the rotor portion of the clutches' field. The hysteresis disk physically passes through the rotor without touching. These disks have the ability to become magnetized depending upon the strength of the flux, this magnetization dissipates when flux is removed. As the rotor rotates, magnetic drag between the rotor and the hysteresis disk is created causing rotation. The hysteresis disk is then pulled into the rotor. Depending upon the output torque required, this pull will eventually match the input speed giving a 100% lock up if required.

Disengagement:

When power is removed from the clutch, this frees the armature allowing it to turn. No residual force is transmitted between either member of the clutch. The only torque seen between the input and the output, is minimal drag from the clutch unit's bearings.

Cycling:

Cycling is achieved by turning the powering of the clutches' coil on and off. Slippage should occur only when accelerating. When the clutch has power, there is no relative slip if the clutch is sized properly. This slippage can be controlled with choice of clutch size. Torque transfer is 100% efficient using the correct size clutch disk.

OGURA HYSTERESIS POWERED CLUTCH FEATURES

Fast response:

Torque being independent of slip speed, is also directly proportional to coil current voltage. This makes response time extremely fast.

Repeatability:

Under symmetrical operating conditions, these units will have the ability to duplicate the clutches' performance. This clutch is ideal for many performance testing applications.

Smooth operation:

The clutch unit transmits torque via magnetic flux. This makes torque smooth throughout its operating rpm range.

Long life:

Because torque is transmitted via an electromagnetic field, no wearing of parts occurs within the normal clutches' operating specifications. The exception to this is of the clutches' bearings and bearing seals. Hysteresis clutch unit's life span is longer than any other type of electromechanical unit.

Electrical hysteresis brakes have an extremely wide torque range. These units can also be controlled remotely, making them ideal for test stand applications where variances in torque are required. These units offer minimal drag in torque, thus allowing these units to have the widest available torque range of any of the hysteresis products. These units are mostly found in test stand applications requiring strong, and precise torque control.

Engagement:

When power is applied to the brake's field, it creates an internal magnetic flux. That flux is then transferred into a hysteresis disk passing through the field. The hysteresis disk is attached to the brake shaft. A magnetic drag on the hysteresis disk allows for a constant drag, or eventual stoppage of the output shaft.

Disengagement:

When power is removed from the brake, the hysteresis disk is free to turn, and no relative force is transmitted between either member of the brake; therefore the only torque seen between the input and the output is mild bearing drag.

Cycling:

Cycling is achieved by powering the voltage/current to the coil on and off.

OGURA HYSTERESIS POWERED BRAKE FEATURES

Fast response:

Torque being independent of slip speed, is also directly proportional to coil current voltage. This makes response time extremely fast.

Repeatability:

Under symmetrical operating conditions, these units will have the ability to duplicate the brake's performance. This brake is ideal for many performance testing applications.

Smooth operation:

The brake unit transmits torque via magnetic flux. This makes torque smooth throughout its operating rpm range.

Long life:

Because torque is transmitted via an electromagnetic field, no wearing of parts occurs within the normal brake's operating specifications. The exception to this is of the brake's bearings and bearing seals. Hysteresis brake unit's life span is longer any other type of electromechanical unit.

Ogura's Mobile Clutches

Ogura Mobile Electromagnetic Clutches Overview

Ogura mobile electromagnetic clutches provide reliable performance in long life applications where durability and dependability are a must. These clutches were designed for automobile air conditioning compressor systems. Now they are found in hydraulic pumps, water pumps, electromagnetic fan clutches, and clutches for vacuum pumps. The units that are used to clutch hydraulic pumps, and clutch water pumps are typically used in tow truck, marine winch drives, and boom truck applications. Ogura mobile clutches facilitate water pumps, and on such equipment as water jetters, high power pressure washers, street sweepers, and carpet cleaning products for trucks.

Additionally, these clutch pumps are often used in vacuum pump, and compressor applications. These include such industries as refrigeration, waste water removal, as well as mobile service trucking industries. These clutches are also used in "under the hood" applications where the clutch is used to engage a compressor mounted in the engine compartment of heavy duty service type trucks.

Ogura mobile clutches range in size from a small 58 ft.lb. to the large industrial strength 1500 ft.lb sizes! These clutches feature numerous pulley configurations including the ever popular v-belt and poly-v set up, and universal hub mounts. The customer can choose from a straight, splined, or even tapered hubs to match their corresponding pump shaft configuration. Many Ogura pump and compressor clutch designs are interchangeable with both Pitts and Warner Electric type clutches.

Ogura Mobile Electromagnetic Clutches

Ogura electomagnetic mobile clutches are made up of three major sub-assemblies

These assemblies include:

Field Assembly

The field assembly includes the coil and backing flange. These provide the magnetic flux causing the clutch to engage.

Rotor Assembly

The rotor assembly includes the pulley, bearing, and is used for the clutch input.

Armature assembly

The armature assembly includes the armature springs, disk, and hub. These are used for the clutch output.

The field assembly is fixed to a stationary support system, such as a pump bracket. The rotor is then driven by the serpentine belt from the engine and rotates constantly. When the clutch receives power signal, the armature pulls against the rotor, then and drives the shaft of the pump.

Engagement of the armature assembly to the rotor assembly is created by the magnetic attraction between these two elements. The magnetic flux is transferred from the field into the rotor and then into the armature assemblies. The slots in the rotor and the armature in the clutch industry are called “banana slots”. These slots allow the flux to make contact with the rotor and the armature in multiple places. [Normal magnets have only two points of contact, north and south]. By making multiple points of flux connection, clutch torque can be considerably increased. A standard mobile clutch has two flux paths, This is called a double flux, also known as a four-pole design. To disengage the clutch, the power signal to the clutch coil assembly is switched off. Once the voltage is disontinued, the springs between the armature assembly and the hub, then pull the armature assembly away from the rotor, thus creating an air gap ensuring no contact between the rotor and armature assemblies.

Reduce your horsepower consumption, and make your engine more efficiently

The pump is only activated when needed, this saves on fuel economy, and fuel consumption when not in use.

Extended pump life

The clutch allows the pump to be disengaged when not in use, thus clutch life is greatly extended as the pump is not rotating at all times.

Less cost

Becuase the pump only runs as needed, fuel economy increases, and reduces costly repairs.

Simple installation

The clutch runs directly off the battery, therefore all that is required is a switch to engage the clutch.

Operator convenience

Instead of of a mechanical linkage needed by an operator to engage the clutch, a simple flick of an electric switch is all that is required. Because the clutch is engaged electronically, this switch can be incorporated into a control panel and engaged remotely.

Cold weather starting

Using a clutch, the load is not engaged at start up. This allows the engine to complete it's heat cycle before engaging the clutch, thus making the engine more effecient.

Solid forged rotor

Using a one piece forged rotor, allows for no internal parts separation. Ogura's rotor wall thickness surrounding the coil gives optimum flux distribution, thus maximizing torque.

Different coil voltages are available

12 volt coils are the most common, however, 24 volt coils can are available upon request. Depending upon the quantity ordered, other specialty voltages can be made.

High temperature long life grease

All models include our special long life grease. This has shown to significantly improve clutch life over other brands of high temperature greases.

E-coating

Where possible, all clutch parts are e-coated to give maximum corrosion protection, thus extending clutch life.

High temperature epoxy coil

For failure prevention against both vibration, and outside contaminants, all coils are sealed within the coil shell, and high temperature epoxy coating is added.

Forged machined pulley

All Ogura clutch models in this section use a heavy duty machined pulley. Stronger pullies resist damage due to abusive environments.

Ogura's PTO Clutches

Ogura Ogura PTO Clutches Overview

Ogura manufactures many electric clutches used as PTO clutches in riding mowers, zero turn mowers, commercial, and walk-behind mowers. Heavy duty Ogura PTO clutches provide extended life in demanding enviornments, estate mowers, commercial mowers, municipal lawn mowers, and other industrial grounds keeping machinery. Electric PTO clutches are a cost effective, reliable means to implement control, and contribute to operator safety.

Ogura electromagnetic PTO clutch brakes double the life of competitive clutches by the simple adjustment just three adjusting nuts. This means you do not need special tools to adjust an Ogura PTO clutch. Adjustments can be performed in minutes with a standard open ended wrench!

Our electric PTO clutches, and clutch brakes are used to remotely engage the cutting wheel in stump cutters, stump grinders, and log cutters. These clutches allow the operator to control the implementation of the application from a safe distance. This is an important element of "operator presence" controls.

Ogura electric clutches, and PTO clutches are also used in trenchers, seeders, top dressers, fertilizer, herbicide spreaders, and sprayers. Electric clutches are cost effective, and increase profits by allowing precise application of seeding, chemicals, and top soiling, to maximize effectiveness and minimize waste. Many Ogura clutch and brake units are interchangeable with Warner Electric.

Ogura PTO Clutches

General purpose clutches are made up of two major sub-assemblies. They are:

Field and rotor assembly:

This assembly has consists of a coil and backing plate. The coil provides the magnetic flux allowing the clutch to pull in. The rotor then provides the input rotation as it is secured to the input shaft.

Pulley and armature assembly:

This assembly includes the armature, disk, springs, hub, and pulley. This is the output portion of the clutch. In some cases, a mounting flange is used in place of a pulley.

Brake assembly

This assembly includes the brake shroud, adjustment nuts and springs. By adjusting the force against this brake shroud, stopping time in the application can be controlled.

Engagement of the armature to the rotor is created when the magnetic attraction occurs between the rotor and the armature. The magnetic flux is transferred from the field into the rotor and then into the armature. The slots in the rotor and the armature in the industry are called “banana slots”. These slots allow the flux to make contact to the rotor and the armature in multiple places. A normal magnet only has a north and a south point of attraction. By making multiple contact points of flux connection, the torque can be dramatically increased in the PTO style clutch. When the power is cut, the armature is released and pulled back against the brake shroud by leaf springs. As the armature drags against the brake shroud. The blade slows to meet the manufacturer's stop time requirements. The shroud is attached to the backing plate by adjustable studs. The backing plate is connected to a portion of the machine allowing it to withstand harsh mechanical braking force. Depending upon the inertia of the system, the leaf springs can be adjusted by thickness, thus creating stronger torque to further stop time adjustment. This unit also has the advantage of adjustment as it wears. This can be a considerable cost advantage to the customer over the life of the clutch and or brake.

Click the image below to view Oguras PTO clutch and brake page

Ogura PTO clutches

Compact size

Both the clutch and the brake functions are contained in a single unit taking up a very small amount of space.

Easy to control set up

Because the clutches run directly off the battery, all that is required is a switch. This allows the clutch to be placed into tight locations. Wires can be easily routed to a simple switch on the control panel instead of linkages that would be required with mechanical units.

Convenience for Operators

Instead of an operator having to hassle with mechanical linkages, or a belt idler, a simple flip of a switch will engage the clutch. Thus resulting in less operator fatigue.

Simple installation

The clutch runs directly off the battery, therefore all that is required is a switch to engage the clutch.

Operator convenience

Instead of of a mechanical linkage needed by an operator to engage the clutch, a simple flick of an electric switch is all that is required. Because the clutch is engaged electronically, this switch can be incorporated into a control panel and engaged remotely.

Industry compliant

PTO clutches and brakes meet industry stop times, by the assisting of the blades to a stop according to industry standards.

Easy installation

The majority of Ogura clutches are one piece designs. They come as pre-set unit, without the need to make adjustments to either the mower manufacturer, the or customer.

Solid forged rotor

Using a one piece forged rotor, allows for no internal parts separation. Ogura's rotor wall thickness surrounding the coil gives optimum flux distribution, thus maximizing torque.

Different coil voltages are available

12 volt coils are the most common, however, 24 volt coils can are available upon request. Depending upon the quantity ordered, other specialty voltages can be made.

High temperature long life grease

All models include our special long life grease. This has shown to significantly improve clutch life over other brands of high temperature greases.

E-coating

Where possible, all clutch parts are e-coated to give maximum corrosion protection, thus extending clutch life.

High temperature epoxy coil

For failure prevention against both vibration, and outside contaminants, all coils are sealed within the coil shell, and high temperature epoxy coating is added.

Adjustable for wear

All Ogura PTO clutches and brakes in this section have the ability to be adjusted for wear. This saves on cost, and down time for the customer. Because the clutch has the ability to be adjusted while on the machine, the customer can greatly extend the life of the clutch while installed on the machine.

Reduced burnishing time

Ogura uses a coating on the clutch faces that significantly reduces burnishing time of the clutch. This is a standard option on all units.

Ogura's PTO Six Spring Design

Six armature springs apply an even, and dynamic braking force. This allows for greater overall armature movement.

Adjustable brake force design

In some of Ogura's PTO models, the springs can be changed to increase the brake force, helping to stop higher inertia blades.

Heavy duty field plates

To help resist deflection or breakage due to vibration, Some PTO Cluthes have a thicker backing plate. These also are Projection welded which enhances the connection to the coil shell. Many PTO models also incorporate an exit wire protector.

The drawing below shows a typical flange mounted PTO clutch and or brake assembly. Although Ogura has many designs of flange mounted PTO clutch and brakes, “these were first used in the 1970's”. therefore there are very few that are still used in production today. These clutches are made so that the field is mounted directly to the face of the engine. The other components are then mounted to the shaft using a center bolt. Many of our customers have switched to the bearing mounted style due to ease of installation.

Click the Image Below to Read More about Ogura's Typical Mounted PTO Assembly

Ogura Typical Flange Mount PTO Assemblies

Being a flange mounted clutch, this type does not have a field bearing. This makes installation more time consuming, and bearing failure is not possible in this area. Flange mounted clutches are ideal for installations that would remain engaged for long periods of time. If you believe you have an application that would benefit from this type of design, please contact RCS & Associates, and we will assist you with the details.

Ogura's General Purpose Clutches

Ogura General Purpose Clutches Overview

Ogura provides electric clutches for many outdoor power equipment applications. Electromagnetic clutches are key to driving many engine-driven components, such as a stump grinder, pump jack, fan, straw blower or in a salt & sand spreader. Ogura General Purpose electromagnetic clutches can handle almost all direct engine mount clutch requirements in the 5 horsepower to 40 horsepower load range. Our electric clutches and brakes are ideally suited for outdoor applications in the agricultural, power equipment, oil and gas field and power generation industries.

Ogura Brakes and Clutches are designed to transfer power and motion, directly from a gasoline or diesel engines. Ogura clutches feature standard crankshaft bore sizes and torque ratings to handle even high horsepower engines. A wide selection of forged machined pulleys or universal mounts provide for a variety of output drives. Featuring a solid forged rotor and high temp/long life bearings, Ogura General Purpose clutches can tackle the most demanding of applications, and, in many cases, are interchangeable with Warner Electric.

Ogura General Purpose Clutches

General purpose clutches are made up of two major sub-assemblies. They include:

Field and rotor assembly:

This assembly consists of a coil and backing plate. The coil provides the magnetic flux allowing the clutch to pull in. The rotor then provides the input rotation as it is secured to the input shaft.

Pulley and armature assembly:

This assembly includes the armature, disk, springs, hub, and pulley. This is the output portion of the clutch. In some cases, a mounting flange is used in place of a pulley.

In a general purpose clutch, either the pulley/hub or the bore (rotor) of the clutch can be the input. In most cases, the bore (rotor) is the input. This input is normally mounted directly on an engine shaft.

All general purpose clutches are bearing mounted. This means that the field is supported by a bearing on the shaft and does not have to be mounted separately. Some mobile clutches are one piece designs and some are two piece (the field/rotor is one part and armature/pulley is the other).

Engagement of the armature to the rotor is caused by the magnetic attraction between the rotor and the armature. The magnetic flux is transferred from the field into the rotor and then into the armature. The slots in the rotor and the armature are called banana slots. These slots allow the flux to contact the rotor and the armature in more than just two places. (A normal magnet only has a north and a south point of attraction.) By making multiple points of flux connection, the torque can be increased in this type of clutch.

The picture below shows a standard Ogura clutch. It has three flux paths. This is called a triple flux or a six-pole design.

Click the image below to view Ogura's General purpose clutch and brake page to learn more.

Ogura's General purpose clutches and brakes

Click the image below to view Ogura's General purpose clutch and brake page.

Ogura's General purpose clutches and brakes

Compact size

Both the clutch and the brake functions are contained in a single unit taking up a very small amount of space.

Remote actuation

The clutch can be engaged or disengaged from a remote location, also at a distance. Such as the cab in a truck, or a control panel box.

Safety

In many cases when the clutch is driving dangerous applications like a stump grinder, or a trencher. These clutches can be fitted allowing operator presence control. If the operator lets go of the handle, the clutch automatically disengages as a safety. Since electric clutches are not speed dependent, they can be engaged and disengaged at any point in their speed range.

Simple installation

Because the clutch runs directly from battery power, only a basic switch is used to engage, and disengage the clutch.

Convenience for Operators

Instead of an operator having to hassle with mechanical linkages, or a belt idler, a simple flip of a switch will engage the clutch. Thus resulting in less operator fatigue.

Easy Installation

The majority of Ogura clutches are one piece designs. They come as pre-set unit, without the need to make adjustments to either the mower manufacturer, the or customer.

Solid forged rotor

Using a one piece forged rotor, allows for no internal parts separation. Ogura's rotor wall thickness surrounding the coil gives optimum flux distribution, thus maximizing torque.

Different coil voltages are available

12 volt coils are the most common, however, 24 volt coils can are available upon request. Depending upon the quantity ordered, other specialty voltages can be made.

High temperature long life grease

All models include our special long life grease. This has shown to significantly improve clutch life over other brands of high temperature greases.

E-coating

Where possible, all clutch parts are e-coated to give maximum corrosion protection, thus extending clutch life.

High temperature epoxy coil

For failure prevention against both vibration, and outside contaminants, all coils are sealed within the coil shell, and high temperature epoxy coating is added.

Reduced burnishing time

Ogura uses a coating on the clutch faces that significantly reduces burnishing time of the clutch. This is a standard option on all units.

Forged Machine pulley

All Ogura clutch models in this section use a heavy duty machined pulley and, or flange. A stronger pulley is more resilient abusive environments.