SR-A4.0230.030-04.000 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat SR-A4.0230.030-04.000 is part of the SR Synchronous Servo Motors series and features a flange size of 142 mm with a motor length of 388 mm. It has a rated speed of 3000 rpm, a locked-rotor torque of 22 Nm, and uses a resolver encoder type with 8192 increments per revolution. The brake operates at 24 VDC with a holding torque of 18 Nm.
Internal Product Review
SR-A4.0230.030-04.000 is a Bosch Rexroth Indramat synchronous servo motor with a rated speed of 3000 rpm. Resolver feedback with 8192 incr./rev. resolution supports precise motion control and dependable position tracking. A 24 VDC brake delivering 18 Nm holding torque makes the motor a strong choice for controlled stopping and secure axis holding.
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Product Description:
Bosch Rexroth Indramat manufactures the SR-A4.0230.030-04.000, a member of the SR Synchronous Servo Motors series. The unit is a permanent-magnet AC servo motor designed to provide tightly regulated torque and speed for positioning tables, gantries, and packaging axes. When paired with a compatible drive, it supplies continuous rotary motion while the integrated resolver feeds back shaft angle and velocity so the controller can close its loop without external sensors. This arrangement improves accuracy and shortens cycle times in automated machinery.
Mechanical dimensions and electromagnetic constants define how the motor integrates with a machine frame. A square flange measuring 142 mm sets the mounting interface, and the total body length is 388 mm. The shaft is Ø24 × 50 mm for rigid coupling to gearboxes or pulleys. At its rated speed of 3000 rpm the stator produces torque in proportion to current, following the torque constant of 1.57 Nm/A. During stops the holding brake is energized with 24 VDC and draws 0.7 A. Rotor inertia is 54 × 10⁻⁴ kg·m², giving predictable acceleration profiles. The resolver delivers 8192 increments per revolution and maintains ±10 angular min of accuracy.
Standstill and safety behaviors are equally documented. When power is removed, a spring-applied brake generates a holding torque of 18 Nm to secure vertical loads. The rotating elements inside the brake add only 3.1 × 10⁻⁴ kg·m² of inertia, so engagement does not noticeably lengthen deceleration time. For commissioning tests the motor can be locked, and under blocked-shaft conditions it develops 22 Nm while phase current may reach 14 A. These figures help engineers size drives, fuses, and mechanical couplings for worst-case loading without overspecifying other components.
