Product Description:

The MST530G-0006-FH-N0KR-NNNN is a direct-drive synchronous torque motor produced by Bosch Rexroth Indramat within the MST Synchronous Torque Motors series. Its frameless construction is intended for installation inside machine housings where low speed and very high torque are required. By coupling torque directly to the load, it removes belts or gear stages and simplifies mechanical layouts in rotary tables, plastic extruders, and print indexing stations. In industrial automation, it delivers stable motion and accurate positioning while maintaining full torque at very low speeds.

The motor reaches a maximum shaft speed of 120 rpm, while continuous operation is rated at 60 rpm. At that rated point, it produces 4200 Nm of torque and draws a phase current of 76.0 A. The resulting mechanical power output is 26.40 kW. Torque production is tied to a torque constant of 55.30 Nm/A, and the winding has a phase inductance of 12 mH that influences current rise during dynamic operation. A back-EMF slope of 4.400 V per min⁻¹ affects voltage demand during motion, and a phase resistance of 0.7 Ω contributes to I²R heating losses. The stator does not include an integral encoder, so external feedback is required, and the power conductors exit through a right-side terminal box with a reduced outside diameter. Liquid cooling removes losses directly from the copper and helps keep winding temperature within the intended range.

For transient motion, the drive can supply up to 9200 Nm by allowing a peak current of 240.0 A. Thermal storage is limited by a time constant of 8.3 min, so overload bursts must remain brief even though they can occur repeatedly within thermal limits. An aluminum jacket cast into a steel housing creates a rigid structure that protects the magnetic circuit and improves heat flow away from the windings. This arrangement supports high overload operation without requiring mechanical gear reduction.