SE-B5.320.020-04.015 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat SE-B5.320.020-04.015 is a synchronous servo motor from the SE Synchronous Servo Motors series with a rated speed of 2000 rpm and a standstill torque of 39 Nm. This motor features IP67 A-flange protection, a 24 A standstill current, and a brake voltage of 24 V DC providing a brake torque of 56 Nm at 120°C. Its shaft size is 32 by 58 mm and it has a rotor inertia of 13.6 x10^-3 kgm2.
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Product Description:
The SE-B5.320.020-04.015 is a servo motor produced by Bosch Rexroth Indramat within the SE Synchronous Servo Motors series. This frame size supports closed-loop rotary motion for positioning tables, packaging drives, and other industrial automation axes where speed stability and repeatable torque are important. A permanent-magnet rotor supports responsive torque production, and the integrated holding brake helps the axis remain in place when power is removed. The A-flange pattern also allows direct mounting to gearboxes or machine plates without added adapter hardware.
The motor reaches a rated speed of 2000 rpm, so transmission sizing can be based on that continuous operating velocity. At standstill, it can deliver 39 Nm of electromagnetic torque with a corresponding current draw of 24 A. Torque rises in proportion to current by 1.6 Nm/A, which helps relate drive output to motor force during acceleration and steady holding. Copper losses are influenced by a phase resistance of 0.47 ohms, which affects heat generation during sustained loading. A rotor inertia of 13.6 × 10⁻³ kg·m² moderates speed changes, and the voltage constant of 173 V/1000 rpm indicates the back EMF returned to the inverter. The steel shaft measures 32 mm by 58 mm, permitting rigid coupling to pulleys or keyed hubs without additional sleeves.
The holding brake provides up to 56 Nm of torque and uses a rated supply of 24 V DC. Its coil current is 1.5 A, and the brake assembly adds 5.2 kg to the overall mass while contributing 4.5 × 10⁻³ kg·m² of inertia. An IP67 A-flange supports use in washdown areas, while the electrical circuit responds to torque commands within 18 ms. The motor reaches thermal equilibrium after 40 min, so repeated high-load cycles should account for the heat buildup that develops over time. These electrical and thermal values can be used with the winding resistance and standstill data when matching the motor to a suitable drive and protection components.
