SR-A3.0042.060-00.000 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat SR-A3.0042.060-00.000 is a synchronous servo motor from the SR Synchronous Servo Motors series. It features a resolver feedback type with 8192 increments per revolution and has a flange size of 116 mm. The motor delivers a locked-rotor torque of 3.9 Nm, has a shaft size of 19 by 40 mm, and its mass without brake is 7.0 kg.
Internal Product Review
The SR-A3.0042.060-00.000 is a Bosch Rexroth Indramat synchronous servo motor that stands out with 6000 min^-1 rated speed and 3.9 Nm locked-rotor torque. Resolver feedback with 8192 incr/rev supports accurate commutation and stable positioning in demanding motion applications. IP67 protection except output side makes this motor a strong choice for dependable servo service.
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Product Description:
The SR-A3.0042.060-00.000 is a synchronous servo motor produced by Bosch Rexroth Indramat within the SR Synchronous Servo Motors series. This model serves as a compact rotary actuator for automation axes that demand continuous closed-loop control of position, speed, and torque. By pairing with an Indramat digital drive, the motor converts electrical energy from the DC link into controlled mechanical rotation, making it suitable for indexing tables, pick-and-place heads, and compact packaging machines. This type of motor is also well suited to applications that require fast response to changing loads and repeatable motion over short production cycles.
The motor windings are designed for a DC bus of 670 V, so the connected drive must supply this level to reach nominal performance. Under that voltage, the rotor can reach a rated mechanical speed of 6000 rpm, allowing direct coupling to high-speed spindles without external gearing. That speed is useful in equipment where short cycle times depend on rapid motion and minimal mechanical reduction. A torque constant of 0.7 Nm/A links drive current to output torque, so each additional ampere raises shaft torque by that amount. When the shaft is blocked, the unit can develop a locked-rotor torque of 3.9 Nm while drawing 6.0 A. Position feedback is provided by a resolver with 8192 increments per revolution of interpolation, giving fine resolution for precise position control and low-jitter velocity loops.
A square flange of 116 mm and a 19 mm by 40 mm keyed shaft support straightforward machine integration with standard couplings. The housing length is 223 mm without a brake, which helps when axial space is limited. The motor has a mass of 7.0 kg, which keeps the unit manageable for moving gantries while still helping reduce minor vibration. Rotor inertia is 0.0007 kg·m², so acceleration remains responsive with moderate drive current. The housing has an IP67 except on the output side protection rating to help resist dust and water ingress. Two embedded NTC sensors allow the drive to monitor motor temperature and protect the windings during operation.
