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Electric / Electromagnetic Jaw Brakes (JEB)

electric-jaw-clutch

Jaw Brakes are designed to optimize size and space in your application. These electromagnetic brakes are ideally suited for positioning, holding and indexing, as well as situations that require the unit to maintaining positive registration between input and output shaft.

With pins available for single-position engagement, electric jaw brakes are often used in applications that require exact positioning, including imaging, robotics, printing and labeling.

As with all standard CJM products, our electromagnetic brakes can be modified for special uses. We can custom design a solution for your application.

Our experienced engineers are ready for your toughest challenges and are only a phone call away at 860-643-1531.

Specifications / Dimensions

*Dimensions shown are approximate. Contact Engineering for actual diameter.
  Brake Dimensions Adapter Flange Mounting Dimensions
Model Coil Diameter*
A		 Length
B		 Jaw Diameter
C		 # of Screws Screw Size Pilot Diameter
D		 Bolt Circle
E
JEB0375 3.797 2.563 4.047 3 1/4-20 3.226 or 3.222 2 1/4
JEB0425 4.359 2.750 4.625 3 1/4-20 4.059 or 4.055 3
JEB0475 4.828 3.063 5.188 4 1/4-20 4.059 or 4.055 3 3/16
JEB0625 6.359 3.625 6.750 4 1/2-13 5.975 or 5.970 4 1/2
JEB0800 8.094 4.063 8.500 6 3/8-16 7.375 or 7.370 5 1/2
Model Static Torque (lb. ft.) Teeth (qty) Bore Min. (in.) Bore Max. (in.) Keyway (in.) Engagement Speed Max. (rpm) Operating Speed Max. (rpm)
JEB0375 60 360 3/4 7/8 3/16 x 3/32 100 5000
JEB0425 70 360 1 1 1/8 3/16 x 3/32 100 5000
JEB0475 150 560 1 1/4 1 3/8 1/4 x 1/8 100 5000
JEB0625 300 560 1 3/4 1 7/8 3/8 x 3/16 100 4200
JEB0800 600 360 2 2 1/4 7/16 x 7/32 100 3600
*Standard voltages shown. Other voltages available on special order.
**Approximate.
Model Coil Voltage* (VDC ± 10%) Coil Power** (watts) Coil Max. Temp. (°C) Clutch Inertia (lb-ft/sec2) Clutch & Adapter Inertia (lb-ft/sec2) Angular Backlash
JEB0375 100 or 24 45 300 .0004 .0011 1.0°
JEB0425 100 or 24 45 300 .0009 .0021 1.0°
JEB0475 100 or 24 62 300 .0016 .0036 1.5°
JEB0625 100 or 24 62 300 .0059 .0123 1.5°
JEB0800 100 or 24 76 300 .0175 .0343 2.0°

In addition to our standard Electric / Electromagnetic Jaw Brakes, our engineering department can custom design and manufacture a new component to meet your specific requirements. If you have further questions or would like to discuss your specific needs, please contact us.

Images & Drawings

electric-jaw-clutch-dimensions

Features of Jaw Electromagnetic Brakes

Electric Jaw Brakes are available with either 24 or 100 volt DC coils as standard equipment, though other voltages are available to meet your needs. Carlyle Johnson stocks coils with voltages ranging 6 to 240 volts DC.

CJM jaw electromagnetic brakes feature bi-directional operation, meaning operation is not dependent on rotation. Pins are also available with these designs to permit single position engagement.

Advantages

  • Radial flux path design eliminates bearing loading
  • Highest torque in smallest space
  • Positive tooth drive assures secure engagement with minimum backlash
  • Hardened jaws have teeth of high-carbon alloy steel for positive tooth drive

Operation

  • Torque Range 5 lb. ft. to 1500 lb. ft..
  • Bi-directional operation
  • Drag-free neutral, no torque transmitted in the disengaged mode
  • Engaged fully by induced magnetic flux

Customization

  • Full range of tooth configurations for your indexing needs
  • Available as single or multiple position registration for timed applications
  • Available as spring set/electrically released for positioning and holding or electric actuation
  • Custom designs and alterations available

Downloads

product-paper-tech-paper-ringfeder-locking-assemblies-en-11-2022

JEB Brake Specification Sheet
tech-paper-ringfeder-locking-assemblies-rfn-7006-en-11-2021

Upload a CAD for a custom electromagnetic brake design.

Further downloads including certificates, instruction manuals and product images are available to you in our Download Center:

Downloads