SR-A4.0172.060-00.000 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat SR-A4.0172.060-00.000 is part of the SR Synchronous Servo Motors series and offers a locked-rotor torque of 17 Nm with a locked-rotor current of 26 Amps. This servo motor features a flange size of 142 mm and a shaft size of 24 by 50 mm, with a mass of 19 kilograms. It is designed with a resolver feedback system providing 8192 increments per revolution and operates at a rated speed of 6000 revolutions per minute.
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Product Description:
The SR-A4.0172.060-00.000 is a synchronous servo motor built by Bosch Rexroth Indramat for the SR Synchronous Servo Motors series. This rotor-stator unit couples directly to precision machinery that requires closed-loop motion and high spindle speeds. The motor converts controlled electrical power into mechanical rotation for automated production lines, pick-and-place heads, and packaging axes. A compatible servo drive regulates current and uses feedback from the motor to maintain the commanded position, torque, and velocity as operating loads change.
The power section is designed for a DC bus voltage of 670 V, allowing a compatible IndraDrive unit to supply controlled power to the stator windings without an onboard motor rectifier. Position information comes from a resolver that provides 8,192 increments per revolution, allowing fine interpolation and smooth velocity control. Mechanical attachment follows the IM B5 construction type and uses a mounting flange with a 142 mm locating pilot. During startup or a stall, the winding can draw a locked-rotor current of 26 A and produce a locked-rotor torque of 17 Nm. These values assist with the selection of suitable protection devices and mechanical couplings. During continuous operation, the rotor can reach a rated speed of 6,000 rpm to support high-throughput motion cycles. The connected drive dissipates braking energy through an external 3.3-ohm resistor that requires a minimum energy capacity of 785 Ws to prevent DC-bus overvoltage trips.
Dynamic response is influenced by a rotor inertia of 40 × 10⁻⁴ kg·m², which allows rapid axis acceleration while helping to smooth load disturbances. A torque constant of 0.65 Nm/A enables the controller to calculate electromagnetic torque from the instantaneous phase current and apply feed-forward compensation at high speeds. The motor assembly weighs 19 kg and measures 309 mm from the mounting flange to the rear cover. Installation must provide adequate structural support and sufficient clearance for cable routing and bend radii. Torque is transmitted to a gearbox, pulley, or coupling through a keyed shaft measuring 24 mm in diameter and 50 mm in usable length.
