SF-A4.0172.030-14.030 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat SF-A4.0172.030-14.030 is part of the SF Servo Motors series and has a mass of 20.7 kilograms with a flange size of 142 millimeters. This motor delivers a rated speed of 3000 min^-1, a holding brake torque of 18 Nm, and features feedback resolution of eight million increments per revolution. It operates with a brake supply voltage of 24 V DC and a shaft diameter of 24 millimeters.
Internal Product Review
The SF-A4.0172.030-14.030 is a Bosch Rexroth Indramat SF servo motor with a rated speed of 3000 min^-1 and a torque constant of 1.38 Nm/A. High-resolution feedback at 8,000,000 incr/rev and ±20 arcsec accuracy support precise positioning in demanding motion systems. A 24 V DC holding brake with 18 Nm torque adds dependable axis retention, making the unit a strong choice for accurate servo applications.
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Product Description:
The SF-A4.0172.030-14.030 belongs to the SF Servo Motors series produced by Bosch Rexroth Indramat. This synchronous servo motor delivers programmable rotary motion for indexing tables, gantry axes, and similar automation applications. It works with compatible drive electronics to maintain precise velocity and position control under varying loads. The motor’s mechanical interface and wiring arrangement follow the conventions of the series, allowing it to integrate into compatible Rexroth machinery with minimal adaptation.
The motor has a rated shaft speed of 3000 rpm, enabling direct coupling to moderate-speed gearboxes and belt drives. Its electromagnetic design provides a torque constant of 1.38 Nm/A, supporting predictable torque control in response to phase current. Position feedback is supplied by a high-density encoder that provides 8,000,000 increments per revolution and maintains an accuracy of ±20 arcseconds, allowing tight servo control in multi-axis machines. A rotor inertia of 40 × 10⁻⁴ kg·m² balances responsive acceleration with load damping. The mechanical interface includes a 142 mm flange, a 24 mm shaft diameter, and a 50 mm shaft length. The housing has an overall length of 356 mm, providing space for the stator stack and encoder while maintaining a practical installation profile.
The holding brake secures stationary loads with a clamping torque of 18 Nm. It operates from a 24 V DC supply and draws 0.7 A during normal operation. When power is removed, the brake engages to help prevent unintended shaft movement, while its inertia of 3.1 × 10⁻⁴ kg·m² contributes to the rotating assembly’s dynamic response. During startup, the motor can draw a locked-rotor current of 13 A and produce a stall torque of 18 Nm until the rotor begins to turn. The complete assembly weighs 20.7 kg, which should be considered when selecting mounting brackets, support structures, or linear guides. Secure mounting is important because the motor’s mass and startup torque can place substantial loads on the machine frame during acceleration and braking.
