Page contents:

Electromagnetic Brakes (4 models).
Spring Applied Electromagnetic Brake (6 models).
Permanent Magnet Electromagnetic Brake.
Hysteresis Brake. (2 models).
Multiple Disc Brake.
Mag Particle Brake.
Video: how an electromagnetic brake works.
Technical specification catalogue.

For troubleshooting electromagnetic clutches/brakes see pages 56 to 61 of the technical specification catalogue.
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For information for electromagnetic clutches please visit www.jbj.co.uk/electromagnetic-clutches.html

AMB Electromagnetic Brake

Torque Range: 0.25 to 8 Nm / 2 to 70 in-lbs.

Brake designed for general industrial application units feature zero backlash, armature hub, and field assemblies that can accommodate bearings for additional shaft support.
See page 19 for further details of this model.

VB Electromagnetic Brake

Torque Range: 7 to 60 Nm / 5 to 44 ft-lbs.

Brake designed for general industrial applications. Units come standard with zero backlash armature. Units are normally produced in a high torque version but a lower torque is also available which reduces the overall length of the clutch by 15%. Options for this unit include an automatic air gap that adjusts as the clutch wears, a quiet armature option that reduces clutch engagement noise for application in hospitals or offices and a 1 piece designed option that simplifies mounting.
See page 21 for further details of this model.

TMB Electromagnetic Brake

Torque Range: 6 to 200 Nm / 4 to 147 ft-lbs.

Brake is designed for general industrial use. Low inertia zero backlash armature can be bolted to your hub. Brake can be supplied with internal or external hub depending upon overall length restrictions.
See page 22 for further details of this model.

MSB Single Disc Electromagnetic Brake

Torque Range: 0.25 to 8 Nm / 9 to 738 ft-lbs.

Brake designed for general industrial use. Suitable for high speed and high cycle applications. Brake has automatic wear adjustment mechanism which maintains proper air gap over life of the brake to maintain a consistent braking time.
See page 23 for further details of this model.

MCNB Spring Applied Electromagnetic Brake

Torque Range: 0.2 to 1 Nm / 1.8 to 8.9 in-lbs.

Small spring applied brake available with either D hub designs or set screws. Standard voltages are 24 and 45 but other voltage options are available. Units are designed to give 100% rated torque right out of the box. No burnishings required.
See page 33 for further details of this model.

FNB Spring Applied Electromagnetic Brake

Torque Range: 1 to 8 Nm / 9 to 71 in-lbs.

A small spring applied brake with a very thin profile which is mainly used for robotic and ball screw applications. This brake does not come with a hub so customers have flexibility with integrating the brake to their machine by providing their own hub.
See page 35 for further details of this model.

RNB-Z Zero Backlash Spring Applied Electromagnetic Brake

Torque Range: 2 to 16 Nm / 1.5 to 12 ft-lbs.

Spring applied holding brake designed for general industrial applications. Unit is used for holding only and has special zero backlash armature. Very thin brake profile provides a compact package. Braking force is produced via springs so basic fluctuations in voltage and temperature have no effect on the brake. Long life friction material allows for many trouble free cycles. Standard voltages are 24 and 90 volts. Other voltage options are available.
‍See page 36 for further details of this model.

SNB Spring Applied Electromagnetic Brake

Torque Range: 1 to 100 Nm / 0.7 to 74 ft-lbs.

Spring applied holding brake designed for general industrial applications. Unit is used for both stopping and/or holding. Very thin brake profile provides a compact package. Braking force is produced via springs so basic fluctuations in voltage and temperature have no effect on the brake. Long life friction material allows for many trouble free cycles. Standard voltages are 24 and 90 volts. Other voltage options are available.
See page 37 for further details of this model.

RNB Spring Applied Electromagnetic Brake

Torque Range: 2 to 200 Nm / 1.5 to 148 ft-lbs.

Spring applied holding brake designed for general industrial applications. Unit is used for holding only. Very thin brake profile provides a compact package. Braking force is produced via springs so basic fluctuations in voltage and temperature have no effect on the brake. Long life friction material allows for many trouble free cycles. Standard voltages are 24 and 90 volts. Other voltage options are available.
See page 38 for further details of this model.

MNB Spring Applied Electromagnetic Brake

Torque Range: 2 to 800 Nm / 1.5 to 590 ft-lbs.

Spring applied brake used for industrial applications. Units are designed for stopping and/or holding. MNB units 1.2 and higher have adjustable torque feature. Torque of the brake can be fine tuned by you to fit your exact needs. Bolt holes for manual bolt release included on standard units. Optional manual lever releases available by special order.
See page 39 for further details of this model.

PMB Permanent Magnet Electromagnetic Brake

Torque Range: 0.4 to 300 Nm / 3.5 to 265 in-lbs.

Permanent magnet brake designed for industrial and mobile applications. Brake force is produced via magnets which reduces both size and weight of brake versus spring applied brakes. Armature is mounted via springs which eliminates backlash. Standard brakes can accommodate temperatures up to 140° C. Brakes can be tuned to provide a controlled stop. Output assemblies easily modified to fit your application.
See page 40 for further details of this model.

PHT Permanent-Magnet Hysteresis Brake

Torque Range: 0 to 7 Nm / 0 to 62 in-lbs.

Permanent magnet hysteresis units can be configured as a clutch or a brake depending upon mounting. Torque is accurate and dependable because it is produced magnetically, not via friction. Torque is consistent over a given speed range. Because there is no wear, units have an extremely long life. Also since units are sealed, there is no concern about contamination. Each unit has an adjustable torque range that can be set by the user and since the units operate via permanent magnets, no external controls or power is required.
See page 41 for further details of this model.

HB Electromagnetic Hysteresis Brake

Torque Range: 0.05 to 1 Nm / 0.4 to 8.9 in-lbs.

Hysteresis brake for industrial application. Torque is independent of slip speed and can be easily controlled by varying the current. Since there is no frictional contact between the magnets, the units have an extremely wide torque range and are ideally suited for testing machinery and/or application that are required to produce consistent and smooth torque over a wide range.
See page 42 for further details of this model.

MDB-N Electromagnetic Multiple Disc Brake

Torque Range: 18 to 1120 Nm / 13 to 826 ft-lbs.

Multiple disk brakes designed for high torque small space environment. Multiple disks produce high torque in a compact design.
See page 45 for further details of this model.

MWB Electromagnetic Multiple Disc Brake

Torque Range: 24 to 3200 Nm / 18 to 2360 ft-lbs.

Multiple disk brake designed for high torque small environment. Brakes are designed to work in oil. Multiple disks produce high torque in a compact design. Special oil path grooves in the friction plates allow for quick engagement and response time. Because brakes are used in oil lubrication they have excellent heat dissipation.
See page 47 for further details of this model.

OPB-N Electromagnetic Mag-Particle Brake

Torque Range: 0.5 to 8 Nm / 4.4 to 7 in-lbs.

Magnetic particle brake designed for industrial applications requiring fast response time and a stable torque. Units can also be set for continuous slip which makes them ideal for tension applications. Since voltage to torque is linear, output torque can be easily controlled. Since torque is also transmitted via internal particles, unit life is extremely long.
See page 50 for further details of this model.

Video: How an electromagnetic brake works.

Industrial electromagnetic clutches, electromagnetic brakes and clutch brakes are used in many types of high speed, high cycle rate and long life machines including printers, packaging machines, food processing equipment, industrial mixers, and cash counting machines.

The magnetic particle, hysteresis slip clutches and magnetic particle, hysteresis slip brakes are used in many tension control systems to regulate the wind and unwind of fabric or carbon fiber or other materials during processing. Also called particle clutch or particle brakes, they are used in new digital high resolution sign and photograph printers for professionals.

Many designs are interchangeable with Warner Electric, DynCorp, KEB, Electroid, Lenze, Deltran, Intorq and Matrix.

These spring applied brakes, power off brakes, or spring set brakes (formally known as fail-safe brakes) are used in mobile, medical and robotic applications as well as used in radio telescopes. Also called servo motor brakes, they are also used to control electric wind generators, turbines and amusement rides from over speed conditions.

Industrial electric brakes are used in rail road crossing gates and parking lot/toll gates. These devices are also used in mailing machines, mail sorters and semiconductor processing applications.

Applications for high reliability brakes include overhead doors, cranes, marine, construction equipment and brakes for super quiet use in stage and theater can be supplied. Manual release levers or emergency release mechanisms can be available on many of these products if needed.

A wide range of electromagnetic clutch and brake products for a wide range of applications.

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Electromagnetic Brakes

Designed to function and survive in harsh environments, providing reliable performance in many long life applications. Closely related to electromagnetic clutches in design.