Multiple Disc Brake

MDB Series(Must be used with PWM Controller)

Multiple Disc Brake

Wet Static Torque – 12 to 759 lb-ft
Wet Starting Torque – 7 to 449 lb-ft
Dry Static Torque – 13 to 882 lb-ft
Dry Starting Torque – 10 to 673 lb-ft
Max Speed- 1750 to 4200 rpm
Nine standard frame sizes
Overall Length – 1.7″ to 3.9″
Bushing Bore – .9″ to 2.9″

Available Downloads

SEPAC-Data-Sheet-MDB-Brake.pdf

Resources

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Performance / Mechanical Specifications	MDB Series — Model Size
		395	435	475	520	580	640	720	795	925
STP File Model		Model: 395 3D	Model: 435 3D	Model: 475 3D	Model: 520 3D	Model: 580 3D	Model: 640 3D	Model: 720 3D	Model: 795 3D	Model: 925 3D
Torque Rating (Static-Wet)	lb-ft	Model: 395 12	Model: 435 23	Model: 475 46	Model: 520 75	Model: 580 117	Model: 640 187	Model: 720 300	Model: 795 505	Model: 925 795
	(Nm)	Model: 395 (16.2)	Model: 435 (31.2)	Model: 475 (62.4)	Model: 520 (101.7)	Model: 580 (158.6)	Model: 640 (253.5)	Model: 720 (406.7)	Model: 795 (684.7)	Model: 925 (1077.9)
Torque Starting (Wet)	lb-ft	Model: 395 7	Model: 435 12	Model: 475 25	Model: 520 42	Model: 580 65	Model: 640 107	Model: 720 168	Model: 795 281	Model: 925 449
	(Nm)	Model: 395 (9.5)	Model: 435 (16.2)	Model: 475 (33.9)	Model: 520 (56.9)	Model: 580 (88.1)	Model: 640 (145.1)	Model: 720 (227.8)	Model: 795 (381.0)	Model: 925 (608.8)
Torque Rating (Static-Dry)	lb-ft	Model: 395 13	Model: 435 25	Model: 475 52	Model: 520 84	Model: 580 130	Model: 640 208	Model: 720 332	Model: 795 561	Model: 925 882
	(Nm)	Model: 395 (17.6)	Model: 435 (33.9)	Model: 475 (70.5)	Model: 520 (113.9)	Model: 580 (176.3)	Model: 640 (282)	Model: 720 (450.1)	Model: 795 (760.6)	Model: 925 (1195.8)
Torque Starting (Dry)	lb-ft	Model: 395 10	Model: 435 19	Model: 475 39	Model: 520 63	Model: 580 98	Model: 640 161	Model: 720 253	Model: 795 421	Model: 925 673
	(Nm)	Model: 395 (13.6)	Model: 435 (25.8)	Model: 475 (52.9)	Model: 520 (85.4)	Model: 580 (132.9)	Model: 640 (218.3)	Model: 720 (342)	Model: 795 (570.8)	Model: 925 (912.5)
Max Speed	rpm	Model: 395 4200	Model: 435 4000	Model: 475 3500	Model: 520 3200	Model: 580 3000	Model: 640 2500	Model: 720 2200	Model: 795 2000	Model: 925 1750
Overall Length (ref)	in	Model: 395 1.77	Model: 435 1.88	Model: 475 2.04	Model: 520 2.16	Model: 580 2.28	Model: 640 2.44	Model: 720 2.67	Model: 795 2.99	Model: 925 3.38
	(mm)	Model: 395 (44.9)	Model: 435 (47.7)	Model: 475 (51.8)	Model: 520 (54.8)	Model: 580 (57.9)	Model: 640 (62)	Model: 720 (67.8)	Model: 795 (75.9)	Model: 925 (85.8)
Spider Bore (max.)	in	Model: 395 2.75	Model: 435 2.95	Model: 475 3.34	Model: 520 3.54	Model: 580 4.13	Model: 640 4.52	Model: 720 5.31	Model: 795 5.9	Model: 925 6.88
	(mm)	Model: 395 (69.8)	Model: 435 (74.9)	Model: 475 (84.8)	Model: 520 (89.9)	Model: 580 (104.9)	Model: 640 (114.8)	Model: 720 (134.9)	Model: 795 (149.9)	Model: 925 (174.7)
Bushing Bore	in	Model: 395 0.906	Model: 435 1.156	Model: 475 1.281	Model: 520 1.469	Model: 580 1.719	Model: 640 1.906	Model: 720 2.219	Model: 795 2.513	Model: 925 2.906
	(mm)	Model: 395 (23)	Model: 435 (29.4)	Model: 475 (32.5)	Model: 520 (37.3)	Model: 580 (43.7)	Model: 640 (48.4)	Model: 720 (56.4)	Model: 795 (63.8)	Model: 925 (73.8)
Pilot Diameter (max.)	in	Model: 395 1.375	Model: 435 1.625	Model: 475 1.875	Model: 520 2.00	Model: 580 2.5	Model: 640 2.625	Model: 720 2.875	Model: 795 3.25	Model: 925 3.625
	(mm)	Model: 395 (34.9)	Model: 435 (41.3)	Model: 475 (47.6)	Model: 520 (50.8)	Model: 580 (63.5)	Model: 640 (66.7)	Model: 720 (73.1)	Model: 795 (82.6)	Model: 925 (92.1)

MDB Operation

This SEPAC multiple disc brake is designed to operate both dry and in oil. The magnet body is secured to a wall or can be shaft mounted with torque arm. 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 discs to be squeezed between the inner discs and the drag created stops the load.