Product Description:

KEB's P1 Encoders and Brakes series supplies compact electromagnetic brakes for servo axes and conveyors. The 09.P1.220-0087 is a permanent-magnet holding brake that attaches at the motor shaft end to keep a stopped axis from drifting when drive power is removed. In automated machinery, the unit provides static position security and emergency stop torque without consuming energy during standstill, making it suited for vertical Z-axes, indexing tables, or packaging spindles that must resist back-driving during idle periods.

The brake operates continuously at 100% duty time, so its electromagnetic circuit tolerates sustained energization without thermal derating. Inside, a permanent magnet field supplies baseline holding force, and current through the coil counteracts that field to release the shaft. The square flange interface mates directly to common IEC or NEMA motor end bells, and the internal hub slides onto keyed shafts for backlash-free torque transfer. When engaged, it produces a minimum static torque of 65 Nm even at 120 °C, assuring holding capacity at the upper limit of motor winding temperature. The nominal torque capability is 96 Nm, and the 40 W coil keeps release response times short. Overall mass is 3.1 kg, and a factory-set minimum air gap of 0.40 mm prevents frictional drag while maintaining swift pull-in.

Installation accuracy determines residual torque and release repeatability. The permissible air gap may grow to 1.00 mm before re-shimming is required; beyond that distance, flux density falls and release times lengthen. Radial misalignment limits are tight: the magnet may offset from the armature by only 0.20 mm, and shaft concentricity must stay within a 0.10 mm runout band. Additionally, lateral shaft-to-magnet displacement cannot exceed 0.10 mm, which helps keep the friction surfaces parallel and limits uneven wear during repeated engagement.