Servo & Electric Drives
Direct-Drive Torque Motors
Gearless high-torque motors, as frameless kits or housed units.
Permanent-magnet torque motors deliver high torque at low speed straight to the load, removing gearboxes and belts. Frameless versions are supplied as a separate stator and hollow rotor ring for building into rotary tables, swivel heads and other axes; housed liquid-cooled versions with flange and shaft are also available, including low-speed motors used as gearless screw drives. Sizes run from about 85 mm to 1.7 m stator diameter.
Typical specifications
- Torque
- 6 – 95,700 N·m rated; peak up to 155,900 N·m
- Rated power
- 0.5 – 902 kW
- Speed
- Rated 2.8 – 11,000 r/min; max. up to 35,000 r/min on the smallest sizes
- Stator outer diameter
- 85 – 1,700 mm (frameless series)
- Cooling
- Natural convection, water or oil cooling
- Housed low-speed versions
- 2,000 – 9,600 N·m (S1), 60 – 500 r/min, liquid-cooled, hollow shaft optional
Ranges across the product family. Exact figures depend on the model.
Options
- Frameless kit: stator plus hollow rotor ring for integration into the machine
- Water-cooled frameless motors with cooling-jacket stator for high torque density
- Naturally cooled frameless motors
- Oil-cooled versions
- Housed liquid-cooled low-speed high-torque motors with flange and solid, splined or hollow shaft
- Small-diameter high-speed versions
Applications
- Five-axis machine tools: direct-drive cradle rotary tables and swivel heads
- Industrial robots
- Oil and gas drilling equipment
- Telescopes and aerospace equipment
- Cable cars and air compressors
- Rubber and plastics machinery, including gearless injection-screw drives
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