Product Description:

The SR-A2.0020.030-14.000 is a synchronous servo motor produced by Bosch Rexroth Indramat as part of the SR Synchronous Servo Motors series. It provides controlled rotary torque and speed in automation cells where accurate positioning is required, such as pick-and-place gantries, feed drives, and light conveyors. By combining a permanent-magnet rotor, resolver feedback, and a spring-applied holding brake in one unit, the motor lets the drive controller start, stop, and hold the axis without external clamping hardware. This layout helps reduce the number of separate components around the machine axis and supports compact installation. It is suited to applications that need repeatable motion over short cycles and controlled holding at standstill.

During continuous operation, the motor reaches a rated mechanical speed of 3000 rpm, at which the electromagnetic design balances torque output and heat rise. The torque constant of 1.5 Nm/A means each ampere of phase current produces that amount of steady torque. When the shaft is blocked, the unit can deliver a locked-rotor torque of 2.0 Nm while drawing 1.3 A of current, which helps the drive respond predictably during short high-load events. A spring-applied brake supplies 3.2 Nm of holding torque, consumes 0.56 A when energized, adds 0.35 kg of mass, and contributes 0.4 × 10⁻⁴ kg·m² of inertia. These brake characteristics affect how quickly the axis can start and stop and how much stationary load it can hold.

The brake releases when supplied with 24 V DC ±10 % at up to 5% ripple, which prevents residual drag during motion. Axis position is measured by a resolver offering 8192 increments per revolution of interpolation with ±10 angular minutes of precision for closed-loop control. Resolver-based feedback is also resistant to electrical noise, which helps maintain stable position information in industrial equipment. The rotating assembly’s inertia of 3 × 10⁻⁴ kg·m² supports rapid acceleration without excessive current demand. Mechanical attachment uses a 100 mm square flange, and power is transferred through a smooth 14 mm by 30 mm shaft that supports straightforward coupling alignment.