Stationary Field Disc Clutch

SFDC Series(Must be used with PWM Controller)

Stationary Field Disc Clutch

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″

Available Downloads

SEPAC-Data-Sheet-SFDC-Clutch.pdf

Resources

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Performance / Mechanical Specifications	SFDC Series — Model Size
		SFDC - 395	SFDC - 435	SFDC - 475	SFDC - 520	SFDC - 580	SFDC - 640	SFDC - 720	SFDC - 795	SFDC - 925
		Model: SFDC - 395	Model: SFDC - 435	Model: SFDC - 475	Model: SFDC - 520	Model: SFDC - 580	Model: SFDC - 640	Model: SFDC - 720	Model: SFDC - 795	Model: SFDC - 925
Torque Static (Wet)	lb-ft	Model: SFDC - 395 11	Model: SFDC - 435 21	Model: SFDC - 475 42	Model: SFDC - 520 68	Model: SFDC - 580 106	Model: SFDC - 640 170	Model: SFDC - 720 272	Model: SFDC - 795 459	Model: SFDC - 925 722
	(Nm)	Model: SFDC - 395 (14.9)	Model: SFDC - 435 (28.5)	Model: SFDC - 475 (56.9)	Model: SFDC - 520 (92.2)	Model: SFDC - 580 (143.7)	Model: SFDC - 640 (230.5)	Model: SFDC - 720 (368.8)	Model: SFDC - 795 (622.3)	Model: SFDC - 925 (978.9)
Torque Starting (Wet)	lb-ft	Model: SFDC - 395 6	Model: SFDC - 435 11	Model: SFDC - 475 23	Model: SFDC - 520 38	Model: SFDC - 580 59	Model: SFDC - 640 97	Model: SFDC - 720 153	Model: SFDC - 795 255	Model: SFDC - 925 408
	(Nm)	Model: SFDC - 395 (8.1)	Model: SFDC - 435 (14.9)	Model: SFDC - 475 (31.2)	Model: SFDC - 520 (51.5)	Model: SFDC - 580 (80.0)	Model: SFDC - 640 (131.5)	Model: SFDC - 720 (207.4)	Model: SFDC - 795 (345.7)	Model: SFDC - 925 (533.2)
Torque Static (Dry)	lb-ft	Model: SFDC - 395 12	Model: SFDC - 435 23	Model: SFDC - 475 47	Model: SFDC - 520 76	Model: SFDC - 580 118	Model: SFDC - 640 189	Model: SFDC - 720 302	Model: SFDC - 795 510	Model: SFDC - 925 802
	(Nm)	Model: SFDC - 395 (16.2)	Model: SFDC - 435 (31.2)	Model: SFDC - 475 (63.7)	Model: SFDC - 520 (103)	Model: SFDC - 580 (160)	Model: SFDC - 640 (256.2)	Model: SFDC - 720 (409.5)	Model: SFDC - 795 (691.5)	Model: SFDC - 925 (1087.4)
Torque Starting (Dry)	lb-ft	Model: SFDC - 395 9	Model: SFDC - 435 17	Model: SFDC - 475 35	Model: SFDC - 520 57	Model: SFDC - 580 89	Model: SFDC - 640 146	Model: SFDC - 720 230	Model: SFDC - 795 383	Model: SFDC - 925 612
	(Nm)	Model: SFDC - 395 (12.2)	Model: SFDC - 435 (23)	Model: SFDC - 475 (47.4)	Model: SFDC - 520 (77.3)	Model: SFDC - 580 (120.7)	Model: SFDC - 640 (198)	Model: SFDC - 720 (311.8)	Model: SFDC - 795 (519.3)	Model: SFDC - 925 (829.8)
Max Speed	rpm	Model: SFDC - 395 4200	Model: SFDC - 435 4000	Model: SFDC - 475 3500	Model: SFDC - 520 3200	Model: SFDC - 580 3000	Model: SFDC - 640 2500	Model: SFDC - 720 2200	Model: SFDC - 795 2000	Model: SFDC - 925 1750
Overall Diameter	in	Model: SFDC - 395 3.93	Model: SFDC - 435 4.33	Model: SFDC - 475 4.72	Model: SFDC - 520 5.19	Model: SFDC - 580 5.78	Model: SFDC - 640 6.37	Model: SFDC - 720 7.16	Model: SFDC - 795 7.95	Model: SFDC - 925 9.25
	(mm)	Model: SFDC - 395 (99.8)	Model: SFDC - 435 (110)	Model: SFDC - 475 (119.9)	Model: SFDC - 520 (131.8)	Model: SFDC - 580 (146.8)	Model: SFDC - 640 (161.8)	Model: SFDC - 720 (181.9)	Model: SFDC - 795 (201.9)	Model: SFDC - 925 (234.9)
Overall Length (ref)	in	Model: SFDC - 395 2.56	Model: SFDC - 435 2.75	Model: SFDC - 475 3.06	Model: SFDC - 520 3.37	Model: SFDC - 580 3.56	Model: SFDC - 640 3.75	Model: SFDC - 720 4.16	Model: SFDC - 795 4.75	Model: SFDC - 925 5.44
	(mm)	Model: SFDC - 395 (65)	Model: SFDC - 435 (70)	Model: SFDC - 475 (77.7)	Model: SFDC - 520 (85.6)	Model: SFDC - 580 (90.4)	Model: SFDC - 640 (95.3)	Model: SFDC - 720 (105.7)	Model: SFDC - 795 (120.6)	Model: SFDC - 925 (138.2)
Rotor Bore (max.)	in	Model: SFDC - 395 0.875	Model: SFDC - 435 1.125	Model: SFDC - 475 1.25	Model: SFDC - 520 1.5	Model: SFDC - 580 1.687	Model: SFDC - 640 1.875	Model: SFDC - 720 2	Model: SFDC - 795 2.25	Model: SFDC - 925 2.875
	(mm)	Model: SFDC - 395 (22.2)	Model: SFDC - 435 (28.6)	Model: SFDC - 475 (31.7)	Model: SFDC - 520 (38.1)	Model: SFDC - 580 (42.8)	Model: SFDC - 640 (47.6)	Model: SFDC - 720 (50.8)	Model: SFDC - 795 (57.2)	Model: SFDC - 925 (73)

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.