Product Description:

The SF-B5.0250.020-04.000 is a servo motor manufactured by Bosch Rexroth Indramat for the SF Servo Motors series. It converts electrical energy into controlled torque and speed so axes in packaging machines, handling units, or machining centers can follow precise motion profiles in real time. As part of a closed-loop drive system, the unit pairs with compatible Indramat controllers and returns position data through a high-resolution encoder. In automated systems, this type of motor is used where smooth acceleration, repeatable stopping, and stable speed regulation are required under varying load conditions.

The motor mounts on a square flange that measures 190 mm, and its output shaft is machined to Ø32 × 58 mm so standard couplings can transfer torque without additional adapters. The square flange supports direct face mounting, while the shaft dimensions allow rigid or flexible couplings to be fitted according to the driven mechanism. At its rated operating point, the rotor sustains 2000 rpm, and the torque constant of 2.3 Nm/A indicates the relationship between current and produced torque during continuous operation. The integrated magnetic encoder delivers 8,000,000 increments per revolution with an accuracy of ±20 arcseconds, providing fine position data for servo loops. Dynamic response is influenced by the combined rotor and encoder inertia of 83 × 10⁻⁴ kg·m², while the motor provides a holding torque of 56 Nm at standstill. Power conductors are routed through a dedicated motor cable that uses 4 × 1.5 mm² cores to match the phase current requirements.

The electromechanical holding brake is supplied with 24 VDC and draws 1.33 A when energized, and wiring is carried on a separate 2 × 1.5 mm² brake cable to isolate control circuits from motor power. Separating the brake wiring from the motor power leads helps reduce electrical interference in the control circuit and simplifies cable routing inside the machine. The brake adds 3.8 kg to the assembly and introduces a polar inertia of 30 × 10⁻⁴ kg·m² that should be considered during acceleration analysis. For emergency stops or initial machine alignment, the rotor can withstand a locked-rotor torque of 23 Nm, while the drive may briefly deliver up to 10 A without exceeding thermal limits.