Roller Pinion Racks

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About our Roller Pinion Racks

The Nexen Roller Pinion System (RPS) revolutionizes linear and rotary motion control possibilities. Giving a fresh face to traditional rack and pinion systems, the RPS overcomes the limitations of conventional drive systems and offers unmatched performance from increased accuracy and efficiency. 

The performance of the patented RPS starts with a pinion consisting of bearing-supported rollers that engage a unique tooth profile. Two or more rollers engage the teeth in opposition at all times to eliminate backlash. The pinion rollers glide effortlessly along a tangent path and roll smoothly down the tooth face for quiet, low-friction operation.

Even installation is worry-free, with a simple alignment tool to ensure positional accuracy over multiple rack sections, and is designed for reliable and easy operation, delivering constant positional accuracy regardless of the distance traveled.

Fully customizable, including the finish, the RPS can be designed to meet the specific needs of any application.

Key features include:

  • 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 8 m/s [26 ft/s]
  • Unlimited Length Possible

Resources

Roller Pinon System Technical Data

Roller Pinon System Video(s)

Roller Pinion System Demo

Roller Pinion System

Preloading an Roller Pinon System System

Design World: What is a Rack and Roller Pinion System?

Roller Pinion System Overveiw

Roller Pinon System Rack Installation

Compare Nexen's Racks

 

Premium Rack

Premium Rack

Standard Rack

Standard Rack

Endurance Rack
Endurance Rack

Endurance Rack	  Universal Rack

Universal Rack

Universal Rack Stainless Steel

Universal Rack Stainless Steel

Thrust Force 250 - 26000 N 1000 - 26000 N 1000 - 12000 N 750 - 4500 N 750 - 4500 N
Max Speed 4 - 8 m/s 4 - 8 m/s 4 - 8 m/s 4 - 8 m/s 4 - 8 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 – 1 m/s (size dependent) 0.5 – 1 m/s (size dependent) 0.5 – 1 m/s (size dependent) 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)

Required Components and Accessories for our Roller Pinion Racks

Listed below are some of the Required Components and Accessories for Roller Pinion Racks. Use the filters above to find the complete list of Required Components and Accessories on the product page.

Required Components

  • Roller Pinions
  • Racks

Accessories

  • RPS Pinion Preloader 
  • ISO Pinion Adapter Flanges
  • Harmonic Gearhead with Integral Roller Pinion
  • Grease
  • Rack Alignment Tool

Applications

Nexen's Rack and Pinion System offers an infinite number of design possibilities in applications like:

  • Alternative to ball screws and rack & pinion
  • Cartesian robots
  • Dirty and corrosive environments
  • Custom drilling and angular cutting machines
  • Food Processing
  • Gantry Router
  • Non-destructive testing 
  • Medical imaging
  • Measurement systems
  • Multi-head on a common axis
  • Stainless steel requirements
  • Plasma and laser cutting
  • Vacuum environments
  • Welding and Woodworking
Industry Problems Ball Screws Traditional Rack/Gear & Pinion Systems Ball Drives Chain Drives  Linear Motors 
Direct Rotary Stages
Direct Drive Motors
Nexen 
Roller Pinion Systems
Low Accuracy      X  X    High Position Accuracy 
Backlash / Vibrations  X  X  X  X    Near-Zero Backlash
High Cost  X  X      X  Economical, Efficient Components
Dirty Operation  X  X  X  X    No Dust Emissions 
High Maintenance  X  X    X  X  Little to No Maintenance
Low Load Capacity      X    X  High Load Capacity
Noisy  X  X  X  X    Quiet: pinion rollers glide smoothly along teeth
Low Speed  X  X        Hi Speeds (up to 11 m/sec)
Magnetic Field            No magnetic field
Hi Wear / Low Life  X  X  X  X    Long Life (up to 36 million meters)
Limited System Length/Size  X    X  X  X  Custom Rack Sizes & Modular Components

More Information

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Note: The technical data on this website is subject to change without notice. Please contact Nexen for help with your application, appropriate sizing, and configuration.