Product Description:

The SF-A3.0093.060-04.050 is a synchronous servo motor manufactured by Bosch Rexroth Indramat within the SF Servo Motors series. It supplies fast, closed-loop rotary motion for automated handling, indexing, and packaging stations. Its synchronous design supports smooth response during repeated starts, stops, and direction changes on compact machine axes. An integrated holding brake secures the shaft when power is off, allowing the motor to maintain vertical or safety-related loads without external locking devices.

The motor reaches a rated speed of 6000 rpm, supporting short machine cycles common in pick-and-place tables. Its holding brake delivers 10.0 Nm of static torque to resist load back-drive at standstill. With a torque constant of 0.67 Nm/A, the controller can estimate mechanical output from phase current and keep response predictable as load changes. The windings connect to a DC link of 670 V, which supports high-voltage operation and helps reduce conductor losses. During stall or initial acceleration, the stator can draw 13.5 A; this surge corresponds to a 9.1 Nm locked-rotor torque that can place the highest mechanical demand on couplings and belts. This operating behavior is useful where quick starts and short settling times are required.

Permissible axial shaft load is limited to 133 N, so thrust from couplings or belts must stay below this value. Dynamic stopping energy is routed through a resistor of 3.3 Ω, preventing excessive bus voltage during regenerative braking. The electromagnetic brake closes within 20 ms after power loss and reopens in 29 ms when excitation returns, allowing the motion sequence to transition cleanly between braking and release. Brake release consumes only 0.66 A, so a low-power safety supply can energize the coil when needed. Because the mechanical delay precedes torque transfer, a short dwell may be used to ensure full clamping before the axis is left at rest. Standard wiring uses a 2 × 1.5 mm² brake pair and a 4 × 2.5 mm² motor cable terminated on connector size 1. Separate brake and motor conductors also help keep power delivery and brake actuation organized within the cable set.