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Hysteresis Brakes & Clutches

Precise, permanent, worry-free tension control for fibre-optic cable, light gauge wire, and a variety of power transmission applications.

Magnetic hysteresis brakes use permanent magnets surrounding a hysteresis disc to provide a constant torque, without external power. By varying the displacement of the magnetic hysteresis disk, this torque can be quickly adjusted by a machine operator. The magnetic brakes are ideally suited to control winding applications in the wire, cable and converting industries and anywhere a constant torque is required. There is no magnetic particle leak (the magnetic field is fully contained within the device). As the braking force is created by non-contact means (magnetic field instead of friction) the device is subject to minimum wear and is almost maintenance free. The devices can also be used in custom form as magnetic drive couplings for environmentally sealed units or as a torque limiter on a rotating drive system.

Why use Magnetic Hysteresis Brakes?
• Constant torque independent of shaft (rotor) speed
• No break-away torque
• No contacting or wearing parts
• No friction elements - same smooth torque year after year
• No magnetic particles to leak or contaminate end product
• Operable in some of the most difficult wet environments
• No external electricity to operate
• Brake (with shaft) and clutch (with hollow shaft) available
• Custom designs are also available.

How they operate All important internal clearances are ground to tolerances of less than .025mm (.001 inch). Magnet assemblies (purple) surround our hysteresis assembly (gold). When like poles face each other, they produce maximum magnetic saturation of the hysteresis disc, forcing lines of flux to travel circumferentially through the hysteresis disc. This produces maximum torque.

When opposite poles face each other, they produce minimum saturation of the hysteresis disc. The lines of flux travel right through the hysteresis disc. Combinations of adjustment angles between these two extremes gives infinite adjustability. Because there are no contacting surfaces, the setting can be maintained indefinitely.

513 Shaft Design

Torque (Nm): 0.001 to 0.014
Bending moment (Nm): 0.22
Heat dissipation (watts): 2.2
Max. RPM at max. torque: 1500

513-photo.gif pdf  513 Data Sheet
 

520 Shaft or Stud Design

Torque (Nm): 0.003 to 0.014
Bending moment (Nm): 1
Heat dissipation (watts): 13
Max. RPM at max. torque: 900

520 shaft pic.gif   520 Data Sheet
 
 

523 Shaft Design

Torque (Nm): 0.03 to 1.36
Bending moment (Nm): n/a
Heat dissipation (watts): n/a
Max. RPM at max. torque: 200

523 shaft pic.gif pdf  523 Data Sheet
 

527 Shaft Design

Torque (Nm): 0.003 to 0.014
Bending moment (Nm): 4
Heat dissipation (watts): 13
Max. RPM at max. torque: 900

527-photo.gif   527 Data Sheet
 
 

535 Shaft Design

Torque (Nm): 0.11 to 2.8
Bending moment (Nm): 13.5 
Heat dissipation (watts): 72
Max. RPM at max. torque: 200

535 pic.gif   535 Data Sheet
 

608 Heavy Duty, Shaft Design

Torque (Nm): 0.42 to 7.9
Bending moment (Nm): 225
Heat dissipation (watts): 150
Max. RPM at max. torque: 180

608-photo.gif   608 Data Sheet
 
 

609 Heavy Duty, Shaft Design

Torque (Nm): 0.035 to 0.62
Bending moment (Nm): 12
Heat dissipation (watts): 18
Max. RPM at max. torque: 450

609-photo.gif pdf  609 Data Sheet
 

610 Shaft, Hollow or Coupling Design

Torque (Nm): 0.14 to 4.5
Bending moment (Nm): 17
Heat dissipation (watts): 95
Max. RPM at max. torque: 180

610 shaft pic.gif   610 Data Sheet
 
 

655 Shaft Design

Torque (Nm): 0.14 to 0.56
Bending moment (Nm): 5
Heat dissipation (watts): 18
Max. RPM at max. torque: 450

655-photo.gif pdf  655 Data Sheet
 

663 Shaft Design

Torque (Nm): 0.33 to 7.9
Bending moment (Nm): 23
Heat dissipation (watts): 150
Max. RPM at max. torque: 180

663 shaft pic.gif   663 Data Sheet
 
 

806 Clutch Mount

Torque (Nm): 0.33 to 7.9
Bending moment (Nm): 23
Heat dissipation (watts): 150
Max. RPM at max. torque: 180

806 hollow pic2.gif pdf  806 Data Sheet
 

880 Heavy Duty, Shaft Design

Torque (Nm): 0.015 to 1.46
Bending moment (Nm): 225
Heat dissipation (watts): 28
Max. RPM at max. torque: 180

880 shaft.gif   880 Data Sheet
 
 

929 Face Mount

Torque (Nm): 0.68 to 15
Bending moment (Nm): 23
Heat dissipation (watts): 180
Max. RPM at max. torque: 180

929 pic.gif pdf  929 Data Sheet
 
 

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