SEPAC, Inc.
Elmira, NY 14903
May 19, 2006 Measuring 5 in. long, 30-Degree Arc Brake supplies 90 lb-ft torque, is spring applied, and electrically released. It has 4 stationary inner disks with friction pucks and 5 rotating outer disks. Steel magnet body and spring loaded armature plate attach to stationary surface. Energized coil compresses spring and attracts armature plate, allowing disks to rotate. Brake is also available as bi-stable, pulse operated brake or power-on brake.

Force Control Industries, Inc.
Fairfield, OH 45014
Aug 20, 2004 Available in Quick-Mount versions, MagnaShear brakes come filled with oil and ready to mount, with no disassembly required. Brake's fan acts as quill clamping device, while pilotless design allows slide-on shaft mounting and brake self-centering. Brakes avoid heat and wear by operating friction surfaces in constantly circulating oil. Units are available in 9 spring-set torque ratings from 6–86 lb-ft and have max KE ranges from 7,967–26,500 lb-ft.

Stearns Div., Rexnord Corp.
Milwaukee, WI 53202 6002
Jan 15, 2003 Series 321 includes 6 armature-actuated, electric, disc brakes with enclosures that reduce noise and protect against hostile environments. Brakes decelerate or hold inertial loads when voltage to brake coil is disconnected. They feature asbestos-free friction discs and require no adjustments. Low-voltage design operates in applications that are susceptible to weak battery or brownout. Static torque ratings are 3, 5, 7, 15, 35, and 50 lb-in.

Warner Electric
South Beloit, IL 61080
Oct 07, 2002 Electrically released Series WR brakes engage when power is turned off or interrupted. Models WR-213, WR-198, and WR-180 feature torque capacities of 53, 35, and 4.43 lb-in., respectively. Brakes offer optional manual release and limit switch to disconnect power or arm warning circuit. Applications include conveyors, machine tools, robotics, hand held power tools, and personal mobility devices.

Rexnord Corp.
Milwaukee, WI 53201
Aug 22, 2002 Stearns® 87,300 Series solenoid-actuated, hazardous location disc brake is offered in 7 sizes with torque ratings from 10–105 lb-ft. Motor- and foot-mounted versions are available with NEMA 4, 7, and 9 enclosure protection. Cast-iron enclosure features O-ring seals between housing and endplate, as well as endplate and motor. Class H coil insulation and built-in thermal protector prevent brake surface temperature from exceeding specified limits for hazardous locations.

Rexnord Corp.
Milwaukee, WI 53201
Jul 24, 2002 Series 320 dyamic disc brakes come in 3 sizes. Size 1.2 has static torque rating of 3 lbs-in. and is available with mounting bolt circle of 2.5 or 2.62 in. Size 1.8 has static torque of 7 or 15 lb-in, and comes with 2.125 in. bolt circle as well as 3.5 in. bolt circle, with or without 2.5 in. register for 42C frame motors. Size 2.8, with 35 lb-in. static torque, is available with 3.5 in. bolt circle. Armature-actuated brake design is direct-acting, with 2 moving parts.

Rexnord Corp.
Milwaukee, WI 53201
Feb 12, 2002 Stearns 321 Series consists of 6 totally-enclosed, non-ventilated, armature-actuated electric disc brakes. They are available with static torque ratings of 3, 5, 7, 15, 35 and 50 lb-in. Brakes are designed for service in dirty or contaminated environments to decelerate or hold inertial loads when voltage to brake coil is disconnected. They are available in versions that will operate on 12, 24, 48, 90 and 180 VDC as well as 230 VAC.

Electroid Co., Div. Of Valcor Engineering Corp.
Springfield, NJ 07081
Jan 29, 2002 Model RFEB power-off brake mounts on front end of standard NEMA 23 and NEMA 34 stepper or servo motors to prevent machine from operating or for holding load in place when power fails. It has spring-set design, ball bearing supported output shaft, and operates at speeds to 8,000 rpm. Brake is available in 24 and 90 Vdc versions. Applications include factory automation, material handling, robotics, CNC tools and systems, and packaging machinery.