SE-LB3.075.030-00.000 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat SE-LB3.075.030-00.000 is part of the SE Synchronous Servo Motors series and has a nominal speed of 3000 rpm with a static torque of 9.3 Nm. This motor has a peak current of 57 A, a moment of inertia of 1.66 x10^-3 kgm^2, and a mass of 12.8 kg. It features a centering diameter of 95 mm and a shaft size of 19 x 40 mm.
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Product Description:
The SE-LB3.075.030-00.000 synchronous servo motor is produced by Bosch Rexroth Indramat in the SE Synchronous Servo Motors series. It serves as the primary rotary actuator within closed-loop motion axes, translating drive current into accurate shaft rotation for pick-and-place units, feeders, and machining fixtures. Its compact housing lets it fit into tight equipment bays while the internal windings pair with Rexroth digital controllers for deterministic speed and torque control.
At installation, a centering diameter of 95 mm registers the front flange to the machine frame, and the 19 × 40 mm shaft transmits load without excessive deflection. Under continuous excitation, the motor produces a static torque of 9.3 Nm, enough for small indexing tables and press feeders. The electromagnetic conversion efficiency is set by a torque constant of 0.98 Nm/A, meaning nearly one newton-meter is generated per ampere of phase current. During operation, the rotor can reach a nominal speed of 3000 rpm; its acceleration is influenced by the rotor’s 1.66 × 10⁻³ kg·m² moment of inertia, which balances fast response with mechanical stability. A 319 mm overall length and 12.8 kg mass ease mounting on linear slides while keeping load overhang low. The windings show 21 mH inductance and 2.1 Ω resistance, values that shape current rise times and power loss.
For transient peaks, the drive may deliver a peak current of 57 A, giving short bursts of torque above the continuous rating, while normal holding demands are met with a standstill current of 9.5 A. The electromagnetic system responds to current commands with a mechanical time constant of 10.2 ms, and thermal equilibrium is reached over a thermal time constant of 32 minutes, allowing intermittent overload without immediate overheating. A permissible axial force of 145 N protects the bearings when belt tensioners or helical couplings are used. The 113 V/1000 rpm voltage constant informs back-EMF calculations for the drive electronics, ensuring correct field-oriented control during regeneration.
