Product Description:

The SR-B5.0460.020-04.015 is a precision motor produced by Bosch Rexroth Indramat within the SR Synchronous Servo Motors series. It serves as the rotary actuator in closed-loop axes, supplying controlled torque and speed for automated assembly cells, gantry drives, and similar equipment. Matched with Indramat digital drives, it delivers repeatable motion profiles and dynamic positioning for manufacturing processes across automotive, food, and electronics plants.

At its nominal operating point, the rotor reaches a rated speed of 2000 rpm, giving a balance between throughput and servo bandwidth. The motor has a torque constant of 2.2 Nm/A, so drive current can be estimated directly from the commanded load. When the shaft is energized but blocked, the motor can supply 56 Nm of holding torque to maintain position without external clamps. If power is abruptly applied to a stationary load, the locked-rotor condition produces 46 Nm of startup torque while drawing 21 A from the inverter. A rotor inertia of 166 × 10⁻⁴ kg·m² moderates acceleration peaks, and the separate brake adds 30 × 10⁻⁴ kg·m² of inertia, values that must be entered in the servo loop to prevent overshoot. Copper conductors inside the stator connect to the drive through a 4 × 4.0 mm² motor cable, supporting the required continuous current density.

Mechanical integration is straightforward because the housing carries a 190 mm flange that mates with standard IEC adapters. Output torque is transmitted through a 32 mm diameter shaft that extends 58 mm beyond the bearing journal. Position feedback is provided by a resolver with 8192 increments per revolution resolution, giving fine angular data to the drive controller. The holding brake is powered from 24 VDC and engages when control power is lost. During activation, it draws 1.33 A through a 2 × 1.5 mm² brake cable.