SR-A3.0068.060-10.000 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat SR-A3.0068.060-10.000 is part of the SR Synchronous Servo Motors series and features a resolver feedback device. This servo motor has a flange size of 116 mm, a mass of 9.0 kg, and a rated speed of 6000 min^-1. It operates at a DC link voltage of 670 V and delivers a locked-rotor torque of 6.6 Nm.
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Product Description:
The SR-A3.0068.060-10.000 is a synchronous servo motor built by Bosch Rexroth Indramat for motion axes that require high rotational velocity and compact mounting. It belongs to the SR Synchronous Servo Motors series and serves as a direct-coupled prime mover in automated tooling, pick-and-place modules, and packaging machinery where precise speed regulation is required. The motor delivers continuous torque without an internal brake, so applications that require a stationary holding force must use an external holding mechanism or drive-controlled torque. Its compact design also supports installation in machinery where available space around the motion axis is limited.
The stator is energized from a DC link rated at 670 V, allowing a connected drive to generate phase currents across a broad operating range. Rotor position is returned through a resolver, an analog sensor that withstands electrical noise while providing sinusoidal feedback for closed-loop control. Under nominal conditions, the rotor reaches 6000 rpm, supporting fast cycles in light- to medium-load applications. Torque production scales with current at a ratio of 0.77 Nm/A, allowing commanded current to be translated directly into expected torque. The motor uses an IEC square-frame layout with a 116 mm flange, so it can be attached to compatible gearheads or adapter plates. The housing has an axial length of 255 mm, and the smooth output shaft has a diameter of 19 mm with an extension length of 40 mm for press-fit couplings.
During startup, the winding can draw 8.5 A to generate a stall torque of 6.6 Nm, allowing the axis to overcome static friction or seating loads. Dynamic response is supported by a rotor inertia of 11 × 10⁻⁴ kg·m², which balances acceleration performance with speed stability during rapid motion changes. The motor weighs 9.0 kg, helping limit the mechanical load added to gantries, robot arms, and other moving assemblies. A mating power connector is not included with the motor, so a compatible connector must be provided separately for the electrical installation. Proper connector selection is necessary to maintain secure power delivery and reliable operation throughout repeated motion cycles.
