Roller Pinion System

Rack and Roller Pinion System


RPS25 Pinion w/Rack

A patented rack and pinion system with bearing supported rollers engaging two rack teeth simultaneously to achieve the following specifications:

  • Zero Backlash
  • Lube Free Operation
  • No Cumulative Error
  • High Corrosion Resistance
  • 99% Efficient
  • Accuracy of ±30µm [ .001 in]
  • Rated Life of up to 30 million contacts
  • Speeds of up to 11 m/s [36 ft/s]
  • Unlimited Length Possible
Rollers in Opposition

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RPS Racks

For Details Select Rack Type

Premium Rack Standard Rack Endurance Rack Universal Rack Universal Rack
Stainless Steel
Thrust Force 250 - 14000 N 1000 - 14000 N 1000 - 14000 N 7500 - 10500 N 7500 - 10500 N
Max Speed 4 - 11 m/s 4 - 11 m/s 4 - 11 m/s 4 - 11 m/s 4 - 11 m/s
Accuracy 30 ±µm 50 ±µm 80 ±µm 50 ±µm 50 ±µm
Repeatability 5 ±µm 10 ±µm 20 ±µm 10 ±µm 10 ±µm
Backlash 0 0 0 0 0
Corrosion Resistance Hard Chrome Uncoated Steel Nitrided Uncoated Steel Stainless Steel
Lubrication Free Speed 0.5 m/s N/A 0.5 m/s N/A N/A
Noise Level 75 dB 75 dB 75 dB 75 dB 75 dB
Average Lead Time 1-2 weeks 1-2 weeks 1-2 weeks 1-2 weeks 1-6 weeks
Price compared to Premium 100% 90% 80% 50% Call (size dependent)
Premium Rack Standard Rack Endurance Rack Universal Rack Stainless Rack

RPS Pinions

  • RPS Pinions mount to ISO gearbox flanges or smooth output shafts.
  • The rollers are bearing supported for very low friction and long life.
  • Available in coated or stainless steel.

RPS Accessories

  • RPS Preloaders precisely move the pinion into the rack and establish a small preload.
  • RPS Flange Adapters allow flange mount pinions to mount to one reducer frame size larger than they would directly bolt to.




Rack and Roller Pinion System Videos