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Ogura is the largest manufacturer of electromagnetic clutches and brakes in the world. Current manufacturing capacity is in excess of 30 million clutches and brakes per year. We have 14 manufacturing plants throughout Europe, the Americas, and Asia. All plants are certified ISO9001 and most have been certified ISO 14001 and TS16949. We have over 3,000 designs available. Besides the standard product shown we also make a variety of specialty products. Our products are used in automotive, industrial, mobile, factory automation, office automation, agricultural and construction machinery industries. Our brakes are made in the following styles: electromagnetic single face, multiple disk, hysteresis, eddy current, magnetic particle and permanent magnet. Torque range for standard products is from .0001nm to 1,000nm.
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Hysteresis Brake Dynamometers (HD series) are versatile and ideal for testing in the low to middle power range (max. 14 kW intermittent duty). Hysteresis Brakes do not require speed to create torque, and therefore can provide a full motor ramp from free-run to locked rotor. Brake cooling is provided by convection (no external source) or by air (compressed air or dedicated blower) depending on the model. Hysteresis Dynamometers have both continuous and intermittent power ratings where the dynamometer is capable of dissipating more power for shorter periods of time. All Hysteresis Dynamometers have accuracy ratings of ±0.25% to ±0.5% full scale, depending on size and system configuration. Also available are special designs for high-speed motor testing.
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Pure Hysteresis Brakes produce torque strictly through a magnetic air gap without the use of magnetic particles or friction components. This method of braking provides far superior operating characteristics (smoother torque, longer life, superior repeatability, high degree of controllability, and less maintenance and down time) which make them the preferred choice for precise tension control during the processing of nearly any material, web or strand.
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The most popular range of MEROBEL's EMP Brakes, offering tailored solutions for every needs from its 10 sizes and up to 5 different version (acceptable power dissipation level) for each size.
Especially designed to be easily fitted on equipments such as Converting, Printing, Wire & cable, and Packaging machines.
Cost effective solution for variable torque simulation systems (automotive and aeronautics test rigs).
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Magnetic particle brakes and clutches are of simple design. Due to their size they produce a high torque compared to for instance hysteresis brakes. They are having two rotors (inner and outer) and an air gap between these two rotors where the magnetic particles are dispersed in. An electric current passing through the coil creates a magnetic field, which aligns the magnetic powder into the gap. The higher the current, the more rigid the connection between the inner and outer rotor becomes. The principle is the same for brake, clutch and torque limitor.
Advantages:
Noisless work
Torque directly proportional to current
Torque independant from r.p.m. (starting from 30 min)
Strong design, units are able to be used with steady slipping
High torque range to be controlled (approx 1:50)
Applications:
Braking
Torque control, torque limiting
Tension control at winding, unwinding
Starting clutch operation
Calculated braking and starting
of certain masses and inertias
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The most popular range of MEROBEL's EMP Brakes, offering tailored solutions for every needs from its 10 sizes and up to 5 different version (acceptable power dissipation level) for each size.
- EMP technology (ElectroMagnetic Particle)
- Torque proportional to the electric current, independent of the slipping speed
- The best design for Tension Control and Test benches applications
- 5 different versions (power dissipation) available
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ZF Hysteresis brakes can accommodate power ratings from 0.05 to 040 Nm, with integrated planet gaer box up to 270 Nm.
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Advantages
The superior design of these hysteresis devices provide several inherent advantages over magnetic-particle and friction devices. They operate on a frictionless design principle with virtually nor wear. This provides such advantages as: longer expected life, superior torque repeatability, life cycle cost advantages, broad speed range, excellent environmental stability and superior operational smoothness.
Control
In an electrically operated hysteresis brake or clutch, adjustment and control of torque is provided by a field coil. This allows for complete control of torque by adjusting DC current to the field coil. Adjustability from a minimum value (bearing drag) to a maximum value of 15 - 35% above rated torque is possible. In a permanent magnet device, the field coil is replaced by a magnet which provides the precise field strength necessary to produce rated torque without the need of electrical excitation. Since the field strength produced by a permanent magnet is a constant value, the resulting torque will also be constant. Physical realignment of the pole structure will result in limited (but predictable) changes in torque. Special designs utilizing this method are available and will allow for adjustments down to approximately 30 - 40% of rated torque.
Longer expected life
Hysteresis brakes and clutches produce torque strictly through a magnetic air gap, making them distinctly different from mechanical-friction and magnetic particle devices. Because hysteresis devices do not depend on friction or shear forces to produce torque, they do not suffer the problems of wear, particle aging and seal leakage. As a result, hysteresis devices typically have life expectancies many times that of friction and magnetic particle devices.
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Permanent Magnet Brakes - High Torque
Permanent magnet brakes of the range “High Torque” are mainly used as holding brakes and generate their braking action through a permanent magnetic field. The following functions are fulfilled here: Holding, positioning and emergency stop. The basic characteristics such as high power density, residual free releasing in any installations and backlash free transmission of the braking torque makes them perfectly suitable for the applications in servo motors.
Versions
86 611..P00
(Holding brake)
Standard rated voltages
24 V
Protection
IP 00
Thermal class
F
Torque
0,8 Nm – 300 Nm
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Magnetic Technologies Ltd. offers a complete line of hysteresis brakes for tensioning and torque limiting.
• Torque range from 0.1 inch ounce to 140+ inch pounds.
• Hysteresis brakes have no break-away torque, no wearing parts, and use no electricity.
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Industrial Clutch Parts manufacture a variety of industrial clutches, brakes, couplings & rotary unions for the global power transmission markets. Product line covers applications in industries such as: oil & gas, marine, pulp & paper, metalworking, mining, & textiles. Directly replaces Eaton Airflex®, Croft®, Renold®s, Fawick® etc.
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Low inertia pneumatic brakes and clutches, also available as spring-applied emergency brakes.
Air tube concept offers sensitivity and versatility to a huge number of high-frequency industrial processes.
The multidisc system gives very high torque in a compact size.
Max. torque from 210 to 49 500 Nm.
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Get More for Less in E-Stop Braking — By Breaking from Convention
# 28 Torque Ranges
# Three Frame Sizes
# 6 Disc Configurations
High Torque, Low inertia Engineering
Innovators at low inertia brake engineering, Force Control Industries, Inc. reduces size and mass to deliver more of what you need from an E-Stop brake - fast acting response - while paring away what you don't want.
Compact, Action Packed Design
Highly compact, space efficient designs, Force Control Industries, Inc. E-Stop Brakes feature a small diameter, multi-stack brake stack. This minimizes cyclic inertia of the brake itself for faster stopping, while multiplying braking surfaces. The brake stacks are fitted with unique dry friction facing material rated for heavy duty performance. Exceptionally durable, the material provides a high-coefficient of friction for high stopping torque in a small package.
Purpose Built Design
Unlike general purpose brakes adapted for E-Stop applications, our purpose built design doesn't need to be large and heavy to dissipate high heat loads, because it isn't subjected to frequent braking cycles. You only need one stop per episode - but then with the fastest possible response time.
So, we designed our E-Stop Brake with small diameter, multiple discs for high braking torque with low inertia. It's the same formula we have applied for years in our high performance oil shear brakes.
Multiple springs provide fast response and balanced braking torque, plus enhanced safety factor in event of a broken spring.
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Simple to be intalled and compact; the Airing radial units are engaged by an air tube and can be used as drum brakes (in stopping and holding applications) or clutches (to connect two shafts directly or through a pulley).
Maximum torque from 40 to 4 000 Nm.
The high thickness friction pad and the reliable air tube ensure high performances and low maintenance cost.
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The DC and DCV constricting drum clutches and brakes are found all throughout industry in general power transmission duties.
Constructed using an integral rim and tube actuator, the DC has low inertia and high misalignment capacity, offering a simple solution to less arduous clutch and brake requirements.
A full range of options is available: Dual flanges for back to back mounting giving double torque capacity. Multiple air inlets for increased response speed. Split construction to avoid removal of the shafts on in-line drives. And wether you require just the friction shoe or mounting pins, or a complete actuator and rim assembly, all are backed by the Wichita name for service and reliability
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Airflex CB element assemblies are used as both clutches and brakes in general power transmission service. The primary feature of the CB design and construction is the Airflex torsional resilient principle made possible by the transmission of power through the side walls of the flexible neoprene and cord actuating tube. This flexibility also permits minor shaft misalignment.
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Airflex E elements are primarily used as slip clutches or tension brakes; however, they can also be used for general power transmission service. Torque is transmitted from the friction shoes to the element housing through torque bars. Engagement occurs when air expands the actuating tube forcing the friction shoes against the inside diameter of the drum. Release springs assist shoe disengagement and counteracts centrifugal force.
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Airflex VE elements were specially designed for greater heat dissipation capacity in an expanding type element. Available in a limited number of sizes, they offer all of the type E features.
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Airflex EB element assemblies are used in both clutch and brake service with light starting loads. The EB is similar in design to the CB except that it is an expanding type unit.
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Airflex ER couplings are expanding units with neoprene facing. As such, they combine the advantages of a flexible and disconnect coupling. Engagement of the element should occur when there is no speed differential between driving and driven shaft.
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... see all the products in the category
Clutches
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Advantages
Pneumatic clamping with high forces
Optimum safety clamping - if the pneumatic fail the system is locked
The values of hydraulic clamps are reached and exceeded
Low system costs in comparison to hydraulics
Simple installation
Compact design
Wide range for many shaft sizes can be delivered
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The SITEMA Safety Brake type KSP is designed to hold a vertical moved mass in one direction (against gravity). The holding is done on a round shaft. This could be an already existing cylinder rod or a separate rod. The Safety Catcher can also be used to catch the falling load in case of an emergency-stop. The holding force is relatively big in one direction (downwards) and in the other direction (upwards) relatively small.
Safety brakes are already used in the following applications
- vertical or diagonal machine tool axes
- vertical axes of loaders
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The Fire Roller Gate is held open by an electric magnet. By signal from the fire alarm or by power failure the magnet is disconnected and the gate closes by a conter weight or similar.
The Eddy Current Brake limits the closing speed and no danger arises during this operation.
The built-in free wheeling disconnects the brake when the door opens again manually/ automatically.
As the Eddy Current Brake works by permanent magnets and not by friction, the brobe capability will never wear out.
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