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SFDC Product Line

SFDC Series

SFDC Product Line

  • Wet Static Torque – 11 to 722 lb-ft
  • Wet Starting Torque – 6 to 408 lb-ft
  • Dry Static Torque – 12 to 802 lb-ft
  • Dry Starting Torque – 9 to 612 lb-ft
  • Max Speed – 1750 to 4200 rpm
  • Nine standard frame sizes
  • Overall Length – 2.6″ to 5.4″
  • Overall Dia. – 3.9″ to 9.2″
  • Rotor Bore – .8″ to 2.8″
Performance / Mechanical SpecificationsSFDC Series — Model Size
SFDC - 395SFDC - 435SFDC - 475SFDC - 520SFDC - 580SFDC - 640SFDC - 720SFDC - 795SFDC - 925
Torque Static (Wet)lb-ft11214268106170272459722
Torque Starting (Wet)lb-ft61123385997153255408
Torque Static (Dry)lb-ft12234776118189302510802
Torque Starting (Dry)lb-ft917355789146230383612
Max Speedrpm420040003500320030002500220020001750
Overall Diameterin3.934.334.725.195.786.377.167.959.25
Overall Length (ref)in2.562.753.063.373.563.754.164.755.44
Rotor Bore (max.)in0.8751.1251.251.51.6871.87522.252.875

SFDC Operation

This SEPAC stationary field multiple disc clutch is designed to operate both dry and in oil. Bearings used are sealed and permanently lubricated, and do not require a grease fitting like some competitive clutches. Many options are available.

When current is applied to the coil in the magnet body, a magnetic field is created which attracts the armature toward the rotor face. This causes the outer disc to be squeezed between the inner discs and the torque is transmitted from the input (rotor) to the output (spider). The magnet body is held stationary by means of an anti-rotation hole as specified by the customer.

Stationary Field Multiple Friction Disc Clutch (SFDC) 2D Drawing

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