SE-LB3.055.060-10.015 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat SE-LB3.055.060-10.015 is a synchronous servo motor from the SE Synchronous Servo Motors series. It provides a nominal speed of 6000 rpm and a maximum torque of 16.2 Nm. The motor features a peak current of 76 Amps, a shaft size of 19 x 40 mm without keyway or feather key, and a winding inductance of 11 millihenry.
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Product Description:
The SE-LB3.055.060-10.015 is a synchronous servo motor built by Bosch Rexroth Indramat in the SE Synchronous Servo Motors series. Designed for closed-loop industrial automation, the unit converts controlled stator currents into mechanical rotation so drive controllers can position tooling, conveyors, or indexing mechanisms with high repeatability. By pairing with feedback devices on the machine axis, the motor delivers the precise torque and speed profiles required for modern assembly lines and packaging equipment.
In operation, the motor reaches a nominal speed of 6000 rpm, allowing fast traverse cycles without external gear reduction. Dynamic current demand peaks at 76 A, so the connected inverter must supply this burst during acceleration. Each ampere contributes approximately 0.52 Nm/A because of the winding torque constant, translating electrical input into usable shaft torque. The electrical time constant of 10.2 ms indicates how quickly current rises in the coils, while the small rotor inertia of 1.21 × 10⁻³ kg·m² minimizes lag between the command and motion. A ramp-up time of 53 ms allows the axis to change speed swiftly. A tacho electromotive force of 1.8 V/1000 rpm supports analog velocity feedback, and static torque of 6.5 Nm permits load holding at rest. The winding has an inductance of 11 mH and a resistance of 1.03 Ω. The shaft measures 19 mm in diameter and 40 mm in length, and it is produced without a keyway to accommodate clamp couplings.
For intermittent duty, the mechanism can deliver up to 16.2 Nm of torque, providing extra capacity for cutters or grippers that experience short overloads. When the shaft is stationary, the drive must manage a standstill current of 12.6 A, maintaining magnetic flux against static loads. Heat buildup is moderated by a thermal time constant of 28 min, so the housing reaches a steady temperature slowly during repetitive cycles. The back-EMF coefficient of 61 V/1000 rpm assists with drive sizing for regenerative energy paths and establishes the voltage threshold for sensorless speed estimation.
