MRS312B-1N-0170-NNNN Bosch Rexroth Indramat
Wake Industrial LLC is not an authorized distributor of this product.
The Bosch Rexroth Indramat MRS312B-1N-0170-NNNN belongs to the MRS Synchronous IndraDyn H Motors series and is designed as a standard rotor with a smooth rotor drilling. It features a frame size of 312, an internal diameter of 170 mm, and a total length of 344 mm. This rotor has insulation class F, is rated for ambient temperatures from 0 to 40°C, and holds a protection rating of IP00.
Internal Product Review
The MRS312B-1N-0170-NNNN is an IndraDyn H synchronous spindle rotor engineered for precise motor assemblies. Class F insulation and IP00 protection support dependable use in controlled machine environments. Standard construction and plain drilling mounting make this rotor a strong choice for accurate spindle applications.
To contact sales for pricing and lead time:
Payment Methods
Shipping Methods
Our Credentials
Product Description:
The MRS312B-1N-0170-NNNN is a rotor built by Bosch Rexroth Indramat for the MRS Synchronous IndraDyn H Motors series. As a dedicated rotor for synchronous spindle motors, it forms the rotating magnetic core that couples with the stator windings to generate torque in high-speed machine-tool spindles and other precision axes used throughout industrial automation. Its magnetic balance remains within the tolerance required for high-speed operation, helping limit vibration as the spindle accelerates through its operating range.
The allowable ambient temperature range is 0–40 °C, supporting operation in temperature-controlled production areas. The unit belongs to the large 312 frame size, which determines compatibility with the corresponding stator and motor housing. Inside that housing, the rotor has a bore diameter of 170 mm, providing clearance for the spindle shaft and associated cooling channels. Torque capacity is supported by an iron stack length of 300 mm, which provides the active magnetic depth needed for the motor assembly. In the assembled motor, insulation class F permits winding temperatures up to 155 °C without degrading the insulation varnish. The rotor has an IP00 protection rating, so the completed motor housing must protect it from direct exposure to dust, debris, and fluids.
The mechanical outline follows the series’ standard design and uses a B frame-length code for its axial configuration within the IndraDyn H motor range. The mounting interface features plain drilling, allowing bolts or dowels to secure the rotor without threaded inserts or an integrated keyway. Its overall axial length is 344 mm from one end face to the other, providing the required space for the air gap, bearing arrangement, and stator winding position. The smooth rotor bore supports accurate alignment during press-fit installation on the spindle shaft, while the plain mounting holes provide a straightforward mechanical connection.
