Rotating Field Disc Clutch

Rotating Field Multiple Disc Clutch (RFDC)

RFDC Series(Must be used with PWM Controller)

Rotating Field Disc Clutch

Wet Static Torque – 12 to 795 lb-ft
Wet Starting Torque – 7 to 449 lb-ft
Dry Static Torque – 32 to 882 lb-ft
Dry Starting Torque – 10 to 673 lb-ft
Max Speed – 1750 to 4200 rpm
Nine standard frame sizes
Overall Dia. – 3.9″ to 9.2″
Overall Length – 1.7″ to 3.3″
Rotor Bore – .8″ to 2.8″

Available Downloads

SEPAC-Data-Sheet-RFDC-Clutch.pdf

Resources

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Performance / Mechanical Specifications	RFDC Series — Model Size
		RFDC - 395	RFDC - 435	RFDC - 475	RFDC - 520	RFDC - 580	RFDC - 640	RFDC - 720	RFDC - 795	RFDC - 925
STP File Model		Model: RFDC - 395 3D	Model: RFDC - 435 3D	Model: RFDC - 475 3D	Model: RFDC - 520 3D	Model: RFDC - 580 3D	Model: RFDC - 640 3D	Model: RFDC - 720 3D	Model: RFDC - 795 3D	Model: RFDC - 925 3D
Torque Static (Wet)	lb-ft	Model: RFDC - 395 12	Model: RFDC - 435 23	Model: RFDC - 475 46	Model: RFDC - 520 75	Model: RFDC - 580 117	Model: RFDC - 640 187	Model: RFDC - 720 300	Model: RFDC - 795 505	Model: RFDC - 925 795
	(Nm)	Model: RFDC - 395 (16.2)	Model: RFDC - 435 (31.2)	Model: RFDC - 475 (62.4)	Model: RFDC - 520 (101.7)	Model: RFDC - 580 (158.6)	Model: RFDC - 640 (253.5)	Model: RFDC - 720 (406.7)	Model: RFDC - 795 (684.7)	Model: RFDC - 925 (1077.9)
Torque Starting (Wet)	lb-ft	Model: RFDC - 395 7	Model: RFDC - 435 12	Model: RFDC - 475 25	Model: RFDC - 520 42	Model: RFDC - 580 65	Model: RFDC - 640 107	Model: RFDC - 720 168	Model: RFDC - 795 281	Model: RFDC - 925 449
	(Nm)	Model: RFDC - 395 (9.5)	Model: RFDC - 435 (16.2)	Model: RFDC - 475 (33.9)	Model: RFDC - 520 (56.9)	Model: RFDC - 580 (88.1)	Model: RFDC - 640 (145.1)	Model: RFDC - 720 (227.8)	Model: RFDC - 795 (381.0)	Model: RFDC - 925 (608.8)
Torque Static (Dry)	lb-ft	Model: RFDC - 395 13	Model: RFDC - 435 25	Model: RFDC - 475 52	Model: RFDC - 520 84	Model: RFDC - 580 130	Model: RFDC - 640 208	Model: RFDC - 720 332	Model: RFDC - 795 561	Model: RFDC - 925 882
	(Nm)	Model: RFDC - 395 (17.6)	Model: RFDC - 435 (33.9)	Model: RFDC - 475 (70.5)	Model: RFDC - 520 (113.9)	Model: RFDC - 580 (176.3)	Model: RFDC - 640 (282)	Model: RFDC - 720 (450.1)	Model: RFDC - 795 (760.6)	Model: RFDC - 925 (1195.8)
Torque Starting (Dry)	lb-ft	Model: RFDC - 395 10	Model: RFDC - 435 19	Model: RFDC - 475 39	Model: RFDC - 520 63	Model: RFDC - 580 98	Model: RFDC - 640 161	Model: RFDC - 720 253	Model: RFDC - 795 421	Model: RFDC - 925 673
	(Nm)	Model: RFDC - 395 (13.6)	Model: RFDC - 435 (25.8)	Model: RFDC - 475 (52.9)	Model: RFDC - 520 (85.4)	Model: RFDC - 580 (132.9)	Model: RFDC - 640 (218.3)	Model: RFDC - 720 (342)	Model: RFDC - 795 (570.8)	Model: RFDC - 925 (912.5)
Max Speed	rpm	Model: RFDC - 395 4200	Model: RFDC - 435 4000	Model: RFDC - 475 3500	Model: RFDC - 520 3200	Model: RFDC - 580 3000	Model: RFDC - 640 2500	Model: RFDC - 720 2200	Model: RFDC - 795 2000	Model: RFDC - 925 1750
Overall Length (ref)	in	Model: RFDC - 395 1.77	Model: RFDC - 435 1.88	Model: RFDC - 475 2.04	Model: RFDC - 520 2.16	Model: RFDC - 580 2.28	Model: RFDC - 640 2.44	Model: RFDC - 720 2.67	Model: RFDC - 795 2.99	Model: RFDC - 925 2.875
	(mm)	Model: RFDC - 395 (44.9)	Model: RFDC - 435 (44.9)	Model: RFDC - 475 (51.08)	Model: RFDC - 520 (54.9)	Model: RFDC - 580 (54.9)	Model: RFDC - 640 (62)	Model: RFDC - 720 (67.8)	Model: RFDC - 795 (75.9)	Model: RFDC - 925 (73)
Mag Body Bore (max.)	in	Model: RFDC - 395 0.875	Model: RFDC - 435 1.125	Model: RFDC - 475 1.25	Model: RFDC - 520 1.5	Model: RFDC - 580 1.687	Model: RFDC - 640 1.875	Model: RFDC - 720 2.188	Model: RFDC - 795 2.5	Model: RFDC - 925 2.875
	(mm)	Model: RFDC - 395 (22.2)	Model: RFDC - 435 (28.6)	Model: RFDC - 475 (31.7)	Model: RFDC - 520 (38.1)	Model: RFDC - 580 (42.8)	Model: RFDC - 640 (47.6)	Model: RFDC - 720 (55.6)	Model: RFDC - 795 (63.5)	Model: RFDC - 925 (73)

RFDC Operation

This SEPAC rotating field multiple disc clutch is designed to operate both dry and in oil. No bearings are used. Current is supplied to the magnet body coil by an electrical brush through a slip ring. (Grounding is accomplished internally through the magnet body to the machine shaft.) 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 magnet body face. This causes the outer disc to be squeezed between the inner discs and the torque is transmitted from the input (magnet body) to the output (spider).