Friction brakes have a stationary pad (friction facing) and a rotating wear surface. Common configurations include drum brakes, caliper disc brake and shaft mounted brakes with an integral disc and rotor. Friction brakes provide controlled deceleration, stopping, holding, and tension control. Air and spring engaged versions are available in all brake configurations.
Air or spring engaged, shaft mounted friction brakes come with tapered bores to accept QD bushings or straight, bored and keyed to size disc-hubs. Bushings are available to reduce the size of the standard, straight bore models. Air engaged brakes are used for stopping, holding, controlled deceleration and tension control. Spring engaged brakes are excellent stopping and holding devices. Six sizes provide torque up to 10,000 in-lbs.
Seven caliper brake designs include air actuated/spring released, spring engaged/air released and spring engaged/hydraulic released models. Several disc diameters up to 24-inches are offered to provide torque up to 50,000 in-lbs. Multiple calipers are used on a single disc to increase torque. These brakes can accommodate a variety of disc thicknesses. Caliper brakes are used in controlled deceleration, cyclic stopping, holding, emergency stops and tension control applications.
Seven air engaged models fit four brake drum diameters. Drum brakes are actuated with a diaphragm sealed actuator that forces a brake shoe on a drum surface to provide the braking torque. Brake drums are bored and keyed to fit standard shafts. The brake shoes are clamped on the outside of the drum to provide brake torque up to 3750 in-lbs. Hinge top models offer a convenient feature to change rolls when the brake is used in tension control applications.
Double flange brakes, often called coupler brakes, for NEMA and ISO, B5 frame motors up to 20 horsepower or 7.5 kW. All brakes in this series are spring engaged/air released and are used for holding and/or emergency stopping. Four NEMA motor brake models are nickel plated and sealed for wash-down applications needing IP54 water protection.
Nexen Group, Inc. 560 Oak Grove Parkway Vadnais Heights MN 55127 800-843-7445 651-484-5900