SE-LB3.055.030-00.011 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat SE-LB3.055.030-00.011 is part of the SE Synchronous Servo Motors series and has a nominal speed of 3000 rpm with a static torque of 6.8 Nm. This motor features a mass of 10.6 kilograms, an electrical time constant of 8.4 milliseconds, and a shaft measuring 19 by 40 millimeters. It also has a thermal time constant of 29 minutes and operates with a winding resistance of 3.53 Ohms.
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Product Description:
The SE-LB3.055.030-00.011 is a synchronous servo motor manufactured by Bosch Rexroth Indramat and assigned to the SE Synchronous Servo Motors series. Designed for closed-loop positioning and velocity control in automated equipment, the unit uses a flange built to accuracy class R and is balanced to vibration severity grade R, permitting direct coupling to precision frames. Motion is transmitted through a keyed Ø19 × 40 mm shaft, and the 287 mm overall length keeps the motor compact for densely packed multi-axis assemblies. This layout suits transfer systems, indexing tables, and feed axes that need accurate starts and stops in limited mounting space.
The motor has a nominal speed of 3000 rpm, making it suitable for rapid duty cycles. It produces a static torque of 6.8 Nm at zero speed, and its torque constant of 1.02 Nm/A links phase current directly to output torque. A drive must supply a standstill current of 6.7 A to reach the rated holding force, which helps the axis maintain controlled position during dwell periods. Generated back EMF follows a voltage constant of 113 V/1000 rpm, which is used when matching the motor with a compatible servo amplifier and DC bus voltage. These electrical values support predictable torque production during acceleration, low-speed motion, and holding operation.
Dynamic response is shaped by an electrical time constant of 8.4 ms and a mechanical time constant of 3.8 ms, enabling prompt current rise and rapid speed settling for pick-and-place or indexing axes. Heat soak corresponds to a thermal time constant of 29 min, which indicates how long the windings can accept load transients before reaching a steady temperature. The 30 mH winding inductance and 3.53 Ω resistance influence current-loop behavior and continuous power loss during operation. Despite the embedded copper and iron, total mass is only 10.6 kg, which reduces the burden on moving machine members and helps limit added inertia on dynamic axes. This response profile is useful where the axis must reverse quickly without long settling delays.
