SE-LB3.055.030-04.015 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat SE-LB3.055.030-04.015 is part of the SE Synchronous Servo Motors series and has a nominal speed of 3000 rpm with a maximum torque of 16.2 Nm. It features a peak current of 40 A, a holding torque of 8.0 Nm, and weighs 11.3 kg with brake. The motor uses a 24 V DC brake supply voltage and has a winding resistance of 3.53 Ohm.
Internal Product Review
The SE-LB3.055.030-04.015 is a Bosch Rexroth Indramat synchronous servo motor rated for 16.2 Nm maximum torque and 3000 rpm nominal speed. Brake performance is well suited for secure positioning, with 8.0 Nm holding torque and a 24 V DC ±10% brake supply. A 1.02 Nm/A torque constant supports efficient servo response, making the motor a strong choice for dynamic motion applications.
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Product Description:
The SE-LB3.055.030-04.015 is a synchronous servo motor manufactured by Bosch Rexroth Indramat and placed within the SE Synchronous Servo Motors series. Designed for closed-loop positioning and velocity control, the unit converts regulated drive current into precise torque for automated axes in packaging, assembly, and material-handling equipment. Its synchronous operating principle supports accurate starts, stops, and speed changes where consistent motion is required throughout repeated machine cycles.
It reaches a nominal speed of 3000 rpm, allowing linear actuators or gearheads to maintain cycle times without excessive lag. At standstill, the motor can deliver 6.8 Nm of static torque while drawing a steady 6.7 A from the drive, and transient demands are met with a peak current of 40 A. The current-to-torque relationship is given by a constant of 1.02 Nm/A, which helps the controller match commanded current to expected output torque. Phase resistance is 3.53 ohms and inductance is 30 mH, which affect current response and heat generation during continuous operation. The shaft measures Ø19 × 40 mm for direct coupling to pulleys or planetary gear stages, and the integral holding brake operates on 24 V DC ±10% with a nominal draw of 0.8 A.
The motor can produce a maximum torque of 16.2 Nm, which supports rapid acceleration during indexing and short-term load changes. When power is removed, the built-in brake secures the shaft with a holding capacity of 8.0 Nm, helping prevent drift on vertical axes. Dynamic response is supported by a rotor inertia of 1.21 × 10⁻³ kg·m², which helps the servo follow speed commands with limited overshoot. The complete assembly, including the brake, weighs 11.3 kg and has an overall length of 295 mm, which helps conserve space in multi-axis installations. During operation, the voltage constant is 113 V/1000 rpm, indicating the back EMF returned to the drive during field-oriented regulation.
