Product Description:

The MRT360D-3N-0260-NNNN is a torque motor stator-rotor kit delivered by Bosch Rexroth Indramat within the MRT Synchronous IndraDyn T Motors series. As an open kit motor, it is supplied as separate rotor and stator components that integrate directly into machine frames, eliminating housings and bearings. In motion-control systems, this frameless design allows direct drive of rotary tables and indexers, providing high torque at low speed without gear reduction.

Because the kit must be built into a protected enclosure, its degree of protection is rated at IP00, which means no intrinsic sealing is provided against dust or liquids and external shielding must be supplied by the machine. The stator outer ring measures 301.5 mm in diameter, while the rotor internal bore is 260 mm; these dimensions affect how large a through-hole can be routed for cables, media lines, or tooling. A maximum mechanical speed of 1700 rpm is the upper limit for continuous rotation before centrifugal forces exceed design margins. Dynamic behavior is influenced by the rotor moment of inertia of 0.27000 kg·m², which affects acceleration time constants and drive sizing. Fixing threads of M6 cut to 14 mm depth allow the kit sections to be secured to precision mounting surfaces.

The mounting interface follows a 16 × 22.5° fastening pattern, giving evenly spaced bolt positions for balanced clamping. Screws are used for rotor attachment, and the radial air gap must be maintained at 0.25 mm to avoid magnetic contact while minimizing flux leakage. Under nominal excitation, the motor can exert a radial magnetic pull of 800 N on surrounding ferromagnetic structures, and that load must be absorbed by the host bearing system. The bare rotor weighs 13.5 kg, which provides a mass reference for handling fixtures and for calculating shaft loads during acceleration. The kit uses a standard open motor design without integrated sealing or cooling channels.