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Cartridge DDR®

Our exclusive Cartridge DDR® servo motors combine the performance advantages of a frameless motor with the ease of installation of a full-frame motor. They feature an integrated, factory-aligned high resolution feedback device and a unique bearingless design that couples directly to the load, using the machine’s own bearings to support the rotor. Most models can be installed in under five minutes.

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  • 5 frame sizes, multiple lengths
  • 230 / 400 / 480 VAC windings available (high and low)
  • 4.5 to 510 N-m (3.3 lb-ft to 376 lb-ft) continuous torque accommodates a wide range of high-power application requirements
  • Speeds up to 2,500 rpm meet most medium speed and high torque application requirements
  • Power ratings from 775 to 11,700 watts meet high power demands for most applications
  • Integral sine encoder feedback provides resolution of over 134 million counts per revolution
  • Built-in thermistor provides over-temperature protection
  • UL Listed for global acceptance



  • Provides the space-saving and performance advantages of a frameless DDR motor with the ease of installation of a full-frame motor
  • Integrated compression coupling and shipping hardware: eliminates parts and labor for a faster, lower-cost machine build
  • Installs in 5 minutes
  • Up to 50% more torque density than comparably sized conventional servomotors
  • Direct load connection eliminates backlash, compliance and maintenance of gearboxes, belts or pulleys
  • Low cogging for smooth low-speed rotation
  • Zero backlash and compliance provides more responsive system performance
  • Pre-configured amplifiers and feedback devices simplify installation and startup



C04x, C05x, C06x

C09x, C13x

Coupling Technology

Single bolt split hub, access front motor

Multi-bolt compression, access from rear of motor

Mounting Requirements Shaft TIR

0.13 mm

0.038 mm

Perpendicularity of Machine Mounting Face

0.10 mm

0.051 mm

Concentricity of Machine Pilot to Shaft

0.10 mm

0.051 mm

Shipping Hardware

Alignment bolt and cap screw

4 set screws and 4 shipping bolts

Mounting Procedure

Procedure # M-RT-S19-0

Procedure # M-RT-019-07



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