Rack & Pinion Drive

Rack & Pinion Drive

Rack & Pinion Drive – KRP+ the ‘KIT’ concept


KRP+ planetary reducers are the SingleDRIVE components in a family of reducers dedicated to Rack & Pinion and Rotary Table drive applications. They can be used alone as a single drive or combined with a second unit to create a ZERO-BACKLASH Rack & Pinion Axis.

As A SingleDRIVE, the KRP+ features an integral output pinion and planetary gear train that have been optimized for minimum backlash (1 – 3 arc minutes) and maximum STIFFNESS ON RACK. In-Line and right angle versions are available.

DualDRIVE kit combines two KRP+ reducers in a patented, mechanically preloaded ZERO-BACKLASH system. The two units are torsionally preloaded against the rack in this closed loop mechanical system. Only one motor is required to drive the axis.

Two KRP+ reducers can also be combined together in an electrically preloaded TwinDRIVE kit. Backlash is eliminated using two motors, one to drive the axis and one to preload the axis.


  • 6 Sizes
  • Reduction ratios : 5 to 91
  • Acceleration up to : 1000 in/s^2 (25 m/s2)
  • Nominal tangential load up to: 30,000 Lbs.(135,000N)
  • Max axis weight up to: 200,000 Lbs. (90,000 Kg.)
  • Max linear speed up to: 3000 in/min (78 M/min)