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Roller Pinion Racks

The Nexen Roller Pinion System (RPS) presents a fresh take on traditional rack and pinion systems, offering improved possibilities for linear and rotary motion control. By addressing the limitations of conventional drive systems, the RPS delivers enhanced performance in terms of accuracy and efficiency.

The RPS features a patented design that incorporates bearing-supported rollers within the pinion. These rollers engage with a unique tooth profile, ensuring there is zero backlash. As a result, the pinion rollers smoothly glide along a tangent path and operate with minimal friction, providing a quiet and efficient motion.

The installation process for the RPS is straightforward, thanks to a simple alignment tool that ensures positional accuracy across multiple rack sections. The system is designed for reliable and easy operation, maintaining constant positional accuracy regardless of the distance traveled.

Roller Pinion Racks


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 11 m/s [36 ft/s]
  • Unlimited Length Possible


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 ProblemsBall ScrewsTraditional Rack/Gear & Pinion SystemsBall DrivesChain Drives Linear Motors 
Direct Rotary Stages
Direct Drive Motors
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

Linear Motion Control 

Nexen’s Precision Linear Motion technology integrates high-precision drive systems and brakes, including the Roller Pinion System (RPS) and Linear Precision Brakes. This combination creates a complete, zero backlash drive and brake system. With a wide range of Rail Brakes and Rod Locks, Nexen offers unlimited options for holding or emergency stopping loads in linear applications.

Roller Pinion Racks

Roller Pinion Racks

Nexen’s Roller Pinion System (RPS) revolutionises linear and rotary motion control, surpassing traditional rack and pinion systems with increased accuracy and efficiency.

Profile Rail Brakes

Profile Rail Brakes

Nexen’s Linear Precision Brakes provide high clamping forces for secure holding with minimal air required for release.

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