SR-A3.0042.030-00.000 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat SR-A3.0042.030-00.000 is part of the SR Synchronous Servo Motors series and has a 116 mm flange size with a motor length of 223 mm. The servo motor features a resolver feedback type with a resolution of 8192 increments per revolution, and a feedback accuracy of ±10 angular minutes. It offers a rated speed of 3000 min^-1, a torque constant of 1.6 Nm per ampere, and a mass of 7 kilograms.
Internal Product Review
The SR-A3.0042.030-00.000 is a Bosch Rexroth Indramat synchronous servo motor that stands out for smooth 3000 min^-1 rated speed and dependable resolver feedback. Feedback performance is especially strong, with 8192 incr./rev. resolution and ±10 angular min accuracy, making this motor a very capable choice for precise motion applications.
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Product Description:
The SR-A3.0042.030-00.000 is a synchronous servo motor produced by Bosch Rexroth Indramat within the SR Synchronous Servo Motors series. The unit converts electrical energy from a matched drive into precise rotary motion for positioning tasks in automated machinery. Its mechanical interface follows IEC sizing, so it can be installed directly on gearboxes, ball screws, or timing pulleys used in industrial motion axes.
At the mounting end, the motor has a 116 mm square flange that establishes the bolt pattern and center height. Under continuous operation, it reaches a rated speed of 3000 rpm, allowing direct coupling to medium-speed loads without additional reduction gearing. A torque constant of 1.6 Nm/A indicates the proportional relationship between drive current and shaft torque, simplifying current-loop tuning. When the shaft is blocked, the motor can withstand a stall torque of 3.7 Nm, which can be used when selecting mechanical locks and couplings. Position feedback is generated by a resolver that delivers 8192 increments per revolution through interpolation, supplying the drive with fine resolution for velocity and position loops. The motor also has a DIN 332-DS M6 center hole and a pilot diameter of 110 j6 for accurate concentric alignment during mounting.
The motor has a mass of 7 kg, helping support high acceleration rates when it is paired with small payloads. Rotor dynamics are characterized by a moment of inertia of 7 × 10⁻⁴ kg·m², enabling fast reversals with limited drive-current overshoot. During startup, the drive may deliver up to 2.3 A of locked-rotor current, so cable gauges and protective devices must accommodate that value. Power is transferred through a 19 × 40 mm shaft with a keyway and a DIN center hole. The motor has an overall body length of 223 mm, allowing installation where axial space is limited. Feedback accuracy remains within ±10 angular minutes, supporting tight positional tolerances in pick-and-place assemblies and other automated motion applications.
