Product Description:

The SE-LB3.055.060-00.015 is a synchronous servo motor developed by Bosch Rexroth Indramat for the SE Synchronous Servo Motors series. As a rotary actuator, it provides controlled torque and speed for positioning axes, feeders, and similar automation modules. The motor converts drive current into precise mechanical motion for closed-loop industrial machinery.

The motor has an electrical time constant of 3.8 ms and a mechanical time constant of 8.4 ms, so current buildup and rotor acceleration follow command changes within a few milliseconds. Under rated operation, the shaft rotates at 3000 rpm and delivers a static torque of 6.8 Nm while drawing a standstill current of 6.7 A. Short-duration load peaks can be supported because the windings tolerate up to 40 A of peak current without saturation. A torque constant of 1.02 Nm/A relates drive current to output torque. The voltage constant of 113 V per 1000 rpm indicates the back electromotive force that the drive must overcome during acceleration. These electrical parameters affect amplifier sizing and servo loop gain.

An A6×6×32 key fits the stepped shaft, and its keyway transmits torque without slippage. The motor weighs 10.6 kg and has an overall housing length of 287 mm, allowing installation in medium-frame machinery. Its 19 mm shaft has a protruding length of 40 mm and supports direct coupling to gearboxes or pulleys. The thermal time constant is 29 min, so the winding temperature rises gradually during cyclic operation. The phase inductance of 30 mH smooths current ripple, while a resistance of 3.53 Ω limits steady-state current and contributes to the motor’s electrical losses. These values should be considered when matching the motor to a load, selecting the drive settings, and planning operating cycles.