Product Description

The Bosch Rexroth SD-B5.250.015-10.000 is a reliable permanent-field servomotor intended for inverter operation with electronic commutation. The device has permanent magnets made of ferrite material. The unit has a brushless tacho and a commutation sensor for velocity feedback and rotor position detection. The product is designed for all types of mechanical engineering related applications. There is a type label with technical details attached to the unit’s housing. The device has ball bearings at the flange end. The minimum service life of these bearings is 20,000 operating hours.

The shaft extension of the SD motor should not be knocked or hammered because this might damage the ball bearings and the rotor. It should be noted that the user must always disconnect the power supply to the motor before performing any connection or installation work. Due to permanent magnet excitation, the device and tacho terminals tend to be live when its rotor is driven. The unit has a mechanical time constant of 5.9 ms at 20°C. The current rating of the product is 12.9 A. The brushless design of the tacho and motor contributes to its maintenance-free operation.

The SD motor sports high resistance against demagnetization as its admissible peak torque is thrice its rated torque. The device uses an NTC thermostat to monitor the temperature. The motor’s terminal block can be located in the upper right corner. The unit should be connected only using the cables supplied by the manufacturer. The motor features a standard design and has no customization. Based on the current rating, the unit can be matched with an inverter. There are two ways for heat dissipation: thermal radiation and natural convection.