SR-B4.0125.060-14.000 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat SR-B4.0125.060-14.000 is part of the SR Synchronous Servo Motors series and features a flange size of 142 mm with a shaft size of 24 by 50 mm. This motor has a holding torque of 18 Nm and a rated speed of 6000 min^-1, with a mass of 17.7 kg. It uses a resolver feedback type offering a resolution of 8192 increments per revolution and supports a brake voltage of 24 VDC at 0.7 A.
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Product Description:
The SR-B4.0125.060-14.000 synchronous servo motor is produced by Bosch Rexroth Indramat within the SR Synchronous Servo Motors series. Designed for dynamic positioning and velocity control, it combines permanent-magnet excitation with resolver feedback to deliver precise torque in automated production lines. The motor can operate pick-and-place axes, feeders, compact spindles, and other machinery that requires controlled rotary motion. Mechanical mounting uses an IEC square pattern with a flange measuring 142 mm across, supporting installation on compatible machine frames without additional mounting plates.
The motor reaches a rated speed of 6000 rpm, enabling fast traverse moves while closed-loop regulation maintains motion accuracy. A torque constant of 0.71 Nm/A provides a direct relationship between drive current and shaft torque, simplifying controller calculations for load sharing and acceleration ramps. When power is removed, the integrated brake applies a holding torque of 18 Nm to secure vertical or suspended loads. The brake operates from 24 VDC and draws 0.7 A when energized. A shaft measuring 24 mm in diameter and 50 mm in length accommodates rigid couplings or gearheads. The 324 mm housing length provides sufficient space for the windings needed to sustain continuous motor output during extended operating cycles.
The motor accommodates acceleration bursts with a locked-rotor current of 17 A, producing 12 Nm of starting torque for breakaway conditions. Position feedback comes from a resolver with an internal resolution of 8192 increments per revolution and an accuracy of ±10 arc-minutes, giving motion controllers precise feedback for small positioning movements. A rotor inertia of 30 × 10⁻⁴ kg·m² balances rapid response with mechanical stability during changes in speed and direction. The motor has a total mass of 17.7 kg, which must be considered when sizing linear guides or rotary bearings for moving axes. Its resolver supplies position information to the drive throughout operation, allowing the control loop to correct deviations caused by changing loads. The available starting torque also helps the shaft overcome static resistance when machinery begins moving from rest.
