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Fail-Safe Spring Set
Electromagnetic Clutches (FEA) Specifications

Advantages

  • Highly repetitive, spring-set clutch
  • Unique end-plate design allows easy wear adjustment
  • Stationary field eliminates need for brushes and rings
  • Highest torque in the smallest space within the industry
  • Completely assembled, ready to install
  • No levers, cams or highly stressed parts

Operation

  • Torque range 12 lb. ft. - 750 lb. ft.
  • Positive engagement / disengagement possible at any speed
  • Exclusive long-life floating discs pack for low heat, low neutral drag and consistent release
  • Runs in both rotational directions,
    wet or dry
  • Spring applied, electrically released
Electromagnetic Clutch DIagram

Specifications / Dimensions

Model Dyn. Torque (lb. ft.) St. Torque (lb. ft.)
A
B
C		 Min. Axial Position
D		 Bores Keyway Watts
FEA-0375 6 12 3.797 2.563 4.063 .375 3/4 or 7/8 3/16 x 3/32 40
FEA-0425 12 25 4.359 2.750 4.625 .313 1 or 1 1/8 3/16 or 3/32 40
FEA-0475 25 50 4.282 3.063 5.188 .438 1 1/4 or 1 3/8 1/4 or 1/8 50
FEA-0625 50 100 6.359 3.625 6.750 .500 1 3/4 or 1 7/8 3/8 or 3/16 50
FEA-0800 120 240 8.094 4.063 8.500 .500 2 or 2 1/4 7/16 x 7/32 80

All models offer 100 or 24 D.C. volts. All Fail-Safe Coils will operate at rated voltage ± 10%.
Old part designation was FEMA. Dyn = Dynamic. St = Static.

Electromagnetic Clutch Flanges
Internal Flange
Drive Cup # A B (b.c.) Screw Size Holes C D E F Slots
EMA-0375-106-30 4.250 - 4.248 3.067 - 3.057 1/4 3 2.017 - 2.015 4.188 1.188 .188 8
EMA-0425-106-30 4.750 - 4.748 3.630 - 3.620 1/4 3 2.517 - 2.515 4.688 1.250 .188 8
EMA-0475-106-30 5.250 - 5.248 3.942 - 3.932 5/16 3 2.517 - 2.515 5.188 1.375 .250 8
EMA-0625-106-30 6.812 - 6.810 5.317 - 5.307 3/8 4 3.767 - 3.765 6.750 1.656 .313 8
EMA-0800-106-30 8.562 - 8.560 6.255 - 6.245 1/2 4 4.517 - 4.515 8.500 1.703 .313 12
EMA-0950-106-30 10.062 - 10.060 8.067 - 8.057 1/2 4 5.517 - 5.515 10.00 1.781 .313 12
EMA-1150-106-30 11.812 - 11.809 9.817 - 9.807 1/2 6 8.017 - 8.015 11.75 2 .313 12

Standard hardened Electric Clutch Cups are designed especially for use with Electric / electromagnetic clutch and brake units. Available with internal or external flanges and provided with mounting bolt holes, these cups can be quickly adapted to various types of driven or driving members. We offer these cups as an economical and simple way of adapting our clutches and brakes to your conditions.

External Flange
Drive Cup # A B (b.c.) Screw Size Holes C D E F Slots
EMA-0375-106-20 5.625 - 5.623 4.880 - 4.870 1/4 3 3.814 - 3.812 4.188 1.188 .250 8
EMA-0425-106-20 6.125 - 6.123 5.380 - 5.370 1/4 4 4.314 - 4.312 4.688 1.250 .250 8
EMA-0475-106-20 6.875 - 6.873 6.005 - 5.995 5/16 4 4.814 - 4.812 5.188 1.375 .250 8
EMA-0625-106-20 8.500 - 8.498 7.692 - 7.982 3/8 4 6.377 - 6.375 6.750 1.656 .313 8
EMA-0800-106-20 10.625 - 10.623 9.630 - 9.620 1/2 4 8.095 - 8.093 8.500 1.781 .313 12
EMA-0950-106-20 12.250 - 12.248 11.130 - 11.120 1/2 4 9.533 - 9.531 10.00 1.781 .313 12
EMA-1150-106-20 14.248 - 14.247 13.005 - 12.995 1/2 6 11.253 - 11.250 11.75 2 .375 12

External Flange Cup for Model FEA 0265 available upon request.

In addition to our standard Fail-Safe Spring Set Electromagnetic Clutches (FEA), 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.


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