Electric Oil Shear Brakes

The Electro Shear® 8700 Series Oil Shear Motor Brakes are AC electric released, spring applied, three phase AC electric, multiple disc, oil shear motor brakes that deliver precise control, repeatable stopping power and quick response time in the harshest manufacturing environments. High thermal capacity eliminates machine downtime and decreases overall maintenance and repair costs.

AC Brake Coil Technology For Precise Response and Repeatability

The Electro Shear® is the only oil shear brake with a totally encapsulated electromagnetic AC coil for superior response and accurate repeatability. The patented AC coil is extremely efficient, has low inertia and provides fast response time, typically 10 milliseconds. Electro Shear® delivers precise, smooth stopping power consistently over the life of the brake.
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Superior Heat Dissipation

A well designed, cast aluminum housing and a continuous oil flow through the brake disc stack cools and lubricates discs allowing the heat build up from engagement to dissipate through the housing. Electro Shear® brakes keep performing where other electric brakes fail, reducing the need for frequent, costly repairs. Electro Shear® will eliminate brake downtime and reduce operating costs year after year, cycle after cycle.
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Simple Installation, One Piece Assembly

Electro Shear® brakes are delivered from the factory fully assembled and are easily installed on the rear C-flange of a NEMA standard motor. The brake is installed as one, integral piece - no loose pieces, no assembly required. Foot mounted, thru shaft and custom bores are available.
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Features

• 8 Standard Sizes - Torque Range Up to 1750 Lb-ft
• Electric AC Power - 230 VAC, 460 VAC, 575 VAC
• NEMA & IEC Frames 56 - 449
• Spring set brake, fail safe
• Self adjusting - No adjustment needed
• Totally Enclosed Sealed Housing - Eliminates contaminants
• Oil Shear - Operates in a bath of automatic transmission fluid
• Horizontal or Vertical Mounting
• Manual Release

Brake Configurations & Options  Learn more

• Custom & Standard Bores Available
• Thru Shaft, Metric Bores, Tapered Shafts, Stepped Shafts, Splined Shafts
• Encoder Mounting - External For Easy Access
• Proximity Switch - For Brake Release Feed Back
• Foot Mounted Designs
• Double C Face Designs
• Gear Box Mounted Designs

Model Number	Mounting Bore Circle	Min Bore (Inches)	Max Bore (Inches)	All- owable Shaft Length	Static Torque Lb-ft	Dynamic Engage- ment Ft-Lbs	Max Ke Per Engage- ment Ft-Lbs	Inertia Lbs2	Weight Lbs	Input Voltage (VAC)	Coil Resistance @ 23o C (OHMS)	Holding Current Amps
8722	5.875	0.625	1.375	2.500	25	21	19,920 25,255*	0.018	15	230 460 575	31 +/- 20% 125 +/- 20% 194 +/- 20%	0.36 0.18 0.14
8724	7.250	0.875	1.875	2.75	67	56	41,261	0.036	38	230 460 575	12 +/- 20% 59 +/- 20% 92 +/- 20%	0.60 0.30 0.24
8725	7.250 9.000	1.125	1.875	3.750	126*	105	42,791	0.049	60	230 460 575	6 +/- 20% 29.5 +/- 20% 46 +/- 20%"	1.20 0.60 0.48
8727	7.250 9.000 11.000	1.125	1.875	4.630	239	200	59,452	0.061	92	230 460 575	2.4 +/- 20% 9.7 +/- 20% 15 +/- 20%	1.40 0.70 0.56
8228	11.000	1.375	2.625	6.000	464	386	116,681	0.410	120	230 460 575	2.4 +/- 20% 9.7 +/- 20% 15 +/- 20%	1.40 0.70 0.56
8729	11.000	1.625	3.625	6.250	586	489	123,784	1.029	120	230 460 575	2.4 +/- 20% 9.7 +/- 20% 15 +/- 20%	1.40 0.70 0.56
8739	11.000 14.000	1.625	3.625	6.875	885	738	175,771	2.210	175	230 460 575	2.4 +/- 20% 9.7 +/- 20% 15 +/- 20%	1.40 0.70 0.56
8749	14.000 14.500	1.625	4.250	8.688	1708	1424	422,575	12.044	200	230 460 575	2.4 +/- 20% 9.7 +/- 20% 15 +/- 20%	1.40 0.70 0.56