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R911247001 (1MR310D-A125)

1MB High-Speed Asynchronous Motors

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The R911247001 (1MR310D-A125) is a rotor engineered for Bosch 1MB motors of frame size 310 and frame length D, featuring a step interference fit. Designed for use in direct-drive spindle motors typically found in machine tools such as milling and grinding machines, this rotor supports liquid-cooled stators for high power density applications. It weighs approximately 80 kg and is suitable for operation in temperatures from 0 to 40°C, with a storage range of -20 to 80°C. The unit is suitable for both horizontal and vertical storage and falls under IP00 protection. It enables motor output of 340 Nm torque, 28.5 kW at 800 RPM, a maximum speed of 3200 RPM, and a rated power loss of 3.8 kW. Electrical parameters include an 81 A operating current, 299 V voltage, 1.85 mH winding inductivity, and a required coolant flow rate of 5.4 L/min. Vibration protection is essential during storage.

Technical Specifications

Product Compatibility
Bosch 1MB Motors

Motor Frame Size
310

Motor Frame Length
D

Rotor Fit Type
Step Interference Fit

Inside Diameter
125 millimeters

Approximate Weight
80 kilograms

Ambient Temperature Limits
0 to 40 degrees Celsius

Storage Temperature Limits
-20 to 80 degrees Celsius

Storage Conditions
Protected from Dangerous Vibrations

Storage Position
Horizontal or Vertical

Protection Category
IP00

Motor Rated Torque
340 Nm

Motor Rated Speed
800 RPM

Motor Rated Output
28.5 kilowatts

Motor Rated Current
81 Amps

Motor Rated Voltage
299 Volts

Maximum Motor Speed
3200 RPM

Motor Winding Inductivity
1.85 millihenry

Motor Pole Pairs
Three

Rated Operating Power Loss
3.8 kilowatts

Required Coolant Flow Rate
5.4 liters per minute

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Available

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1620 Old Apex Road
Cary, NC 27513, USA

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Indramat USA
1620 Old Apex Road
Cary, NC 27513
USA

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Toll Free: 1-888-551-3082
International: 1-919-443-0207

Indramat USA sells factory new and pre-owned surplus products and maintains channels to procure supply. Indramat USA is not affiliated with nor an authorized distributor or representative of any manufacturers, brands or products listed. Designated trademarks, brand names, and brands appearing herein are the property of their respective owners.