Product Description:

The SF-B4.0091.060-04.050 is a permanent-magnet servo motor built by Bosch Rexroth Indramat within the SF Servo Motors series. It is intended for closed-loop positioning and speed regulation in industrial automation, where rapid response and repeatability are required for axes on packaging, handling, or machining equipment. The motor integrates a holding brake and is delivered with power and feedback connectors sized to match the drive controller family used in the same platform.

The motor has a rated speed of 6000 rpm, allowing high spindle or conveyor velocities without gearbox multiplication. During standstill, the brake can retain up to 18 Nm of torque so loads remain fixed when power is removed. Electromagnetic torque generation is proportional to current, and the torque constant is 0.65 Nm/A, so each ampere produces a predictable increase in shaft torque. The brake circuit is energized from a supply of 24 VDC. At this voltage, the coil draws 0.7 A. These values indicate the electrical demand of the brake circuit and support selection of the dedicated 2 × 1.5 mm² brake cable.

The drive inverter links to the motor’s stator windings through a 670 V DC link, providing enough voltage to support the commanded speed range before field weakening is required. Dynamic behavior is influenced by the rotor’s mass distribution, and a moment of inertia of 0.0021 kg·m² balances acceleration capability against speed stability for mid-sized payloads. Mechanically, the housing follows the flange-mount pattern designated IM B5, so alignment is achieved by a pilot bore instead of foot mounting. Electrical power is routed through a single circular connector identified as size 1 (6-pin). Separate motor and brake conductors use 4 × 2.5 mm² and 2 × 1.5 mm² cables, respectively, which allows straightforward field wiring while minimizing voltage drop.