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Clutches and Brakes

Brakes & Clutches


SDP/SI offers a wide selection of quality clutches and brakes that are immediately available off-the-shelf. We can also re-engineer or modify these products to fit your exact requirements. Not only do we provide a vast collection of components, but we also build fully integrated systems from these components to your specifications.
Follow the links below for complete product specifications, price, availability, and technical information.
Precision Bu-Ord Sized Magnetic Clutches and Clutch Brakes

Precision Bu-Ord Sized Magnetic Clutches & Clutch Brakes


SI builds precision units, Bu-Ors sizes 11 and 18. Our standard catalog offering includes magnetic clutches & clutch brakes, reverse-acting brakes, clutches & clutch brakes, and reverse-acting clutches &clutch brakes.



Precision Magnetic Particle Brakes

Precision Magnetic Particle Brakes


Magnetic Particle Brakes are ideal for tension control applications and high cycle applications such as labeling machines for the food and drug industry. Their operating torque range is broad and can be very accurately controlled. Standard catalog units have a voltage of 24V DC, other voltages are available on special order.

Precision Power-Off Brakes

Precision Power-Off Brakes


Power-Off Brakes are used to stop or hold a load when electrical power is lost. This type of brake is usually used near an electric motor. Inch and metric power-off brakes are offered in a variety of configurations and are energy efficient, simple to install and economical. Power-off parallel plate brakes are also available at SDP/SI

Precision Power-On Brakes

Precision Flange Mounted Power-On Brakes


Power-On Flange Mounted Brakes are anti-backlash when energized and zero drag when den-energized. Both inch and metric sizes are offered. 24V DC is standard with other voltages available on special order.




Precision Permanent Magnetic Brakes

Precision Permanent Magnetic Brakes


Precision Electromagnetic Clutch Couplings

Precision Electromagnetic Clutch Couplings


Shaft-Mounted Clutch Couplings are designed for inline loads. Standard voltage is 24V DC, other voltages and dissimilar bore combinations are available as special order.

Precision Unidirectional Roller Clutches

Precision Unidirectional Roller Clutches


Unidirectional Roller Clutches are designed for use with 1/8 inch to 3/4 inch (4 mm to 35 mm) hardened shafts. These roller clutches are ideal for indexing, backstopping, or overrunning operations. Free rolling one way, drives in opposite direction. They are lightweight, low profile and minimum backlash.

Precision Unidirectional Roller Clutches w/ Bearing Support

Precision Unidirectional Roller Clutches w/ Bearing Support


Unidirectional Roller Clutches with Bearing Support are designed for use with 3/8 inch to 5/8 inch (4 mm to 6 mm) hardened shafts. Bearing support is sintered bronze bearings. Also offered are metric unidirectional roller clutches with needle bearing support for 8 mm to 35 mm shafts.


Precision Electromagnetic Slip Clutches

Precision Electromagnetic Slip Clutches


Electromagnetic Slip Clutches are offered in a variety of configurations, materials and sizes. Both inch and metric dimensioned slip clutches are available as standard catalog items. The standard line of slip elements provides a wide selection of limit torques, sizes and coupling arrangements. In addition, our engineers will modify designs to meet your specific requirements.

Precision Mechanical Slip Clutches

Precision Mechanical Slip Clutches


Mechanical Slip Clutches are offered in a variety of configurations and sizes. Slip clutches are available as standard catalog items in both inch and metric sizes. The standard line of slip elements provides a wide selection of limit torques, sizes and coupling arrangements. For technical questions or help in selection please call our engineering group.



Gears, Differentials, Pinions, and Racks Timing Belt, Pulley, Sprocket,
and Chain Drives
Couplings and Universal Joints Shafts & Shaft Accessories Bearings & Bearing Maintenance Tools Motors, Gearheads and Motion Control Speed Reducers and
Right Angle Gear Drives
Clutches & Brakes Linear Guide Components Vibration & Shock Mounts Hardware, Fasteners & Misc. Components

Our Line of Clutches and Brakes Includes

Mechanical Slip Clutches: provide very low backlash, overload protection and torque control. Miniature sizes are also available for small space requirements.

Spring Wrapped Clutches and Brakes: provide start-stop, overrunning and single revolution functions.

Electromagnetic Clutches and Zero-backlash Clutch Couplings: provide very fast response and friction-free operation. They're ideal for applications such as printers, packaging and office automation.

Power-on and Power-off Electromagnetic Brakes: provide switchable means of stopping and /or holding a load.

Hysteresis Brakes and Clutches: provide smooth, stable, noise-free operation. They are infinitely adjustable and maintenance free. Special mounting configurations and modified shafts are available.

Power-Off Servo Brakes: economical choice that are energy efficient and are easy to install.

Magnetic Particle Clutches and Brakes: provide ultrafast response, silent and smooth operation and no backlash.

Reverse-Acting Brakes: BuOrd Size 11, 18

Clutches & Clutch Brakes: BuOrd Size 18

Reverse-Acting Brakes: BuOrd Size 18