Nexen’s Roller Pinion Gear System (RPG) is based on an innovative pinion consisting of bearing-supported rollers and a unique tooth profile. Options, including gears, gear segments, and geared bearings, can be configured to meet the required specification.

This unique drive system provides high positional accuracy, zero backlash, no cumulative error, low-velocity ripple, high speeds, rigidity, low noise, low maintenance, corrosion resistance, and long life. 

Zero Backlash Geared Bearings

Based on Nexen’s innovative Roller Pinion technology, the Roller Pinion System Geared Bearing (RPS-GB) comes complete with a precision zero backlash gear mounted and dialed in on a precision grade high capacity bearing.

Unlike some cam-driven systems, the Precision Ring Drive Systems can start and stop at any incremental position, allowing for maximum acceleration or deceleration at any point without the risk of damage. 

With many possible sizes and gear ratios, all with zero backlash, the Nexen Geared Bearing can be incorporated into any precision rotary motion control application.

Features

High Precision RPS Gears

• Zero backlash
• One-Way Positional Accuracy as accurate as ±13 ArcSec.
• One-Way Repeatability as accurate as ±1.6 ArcSec
• Lubrication free operation

Large Open Center

• Mount equipment and cabling through the center opening

High Output Torque  

• Maximum acceleration torque of up to 4,313 Nm [3,181 ftlb]
• Nominal torque of up to 2,625 Nm [1,936 ftlb]

Mounting Options 

• Threaded hole mounting
• Through-hole mounting
• Piloting options

High Speed

• Nexen Geared Bearings can handle speeds up to 632 RPM

High Capacity Cross Roller Bearing

• Supports dynamic moment load up to 55 kNm [40,566 ftlb]
• Drive Flexibility
• Pinions compatible with common gearboxes

Applications

• Cutting Systems
• Medical Products
• Robotics
• Aerospace
• Machine Tool
• Semiconductor
• Material Handling

Gears

Nexen’s Roller Pinion Gear System (RPG) includes a patented pinion consisting of bearing-supported rollers and a proprietary tooth profile.

Potential configurations include gears and gear segments with either external or internal teeth, which can be configured to meet the application. Gears pre-installed on heavy-duty bearings are also available.

Nexen’s design opens new machine design possibilities and enables much higher performance, and provides the following:

• High Positional Accuracy
• Zero Backlash
• No Cumulative Error
• Low-Velocity Ripple
• High Speed
• Rigidity
• Low Noise
• Low Maintenance
• Corrosion Resistance
• Long Life

Features

High Indexing Precision 
Nexen’s Roller Pinion Gear Systems offer unmatched mechanical system capabilities with an indexing precision of up to ± 1.7 ArcSec and repeatability of up to ± 0.3 ArcSec. 

Zero Backlash 
Unlike other mechanical drive systems, Nexen’s Gears offer zero backlash. 

High Speed 
Nexen’s Roller Pinion Gear Systems can handle speeds up to 607 RPM, and unlike traditional cam-driven systems, they can handle peak torque inputs at any time. This allows for faster indexing times than other options. 

Solutions, including gears and gear segments with either external or internal teeth, can be configured to meet your specification. Pre-installed gears on heavy-duty bearings are also available.

Applications

Nexen’s Gears and gear segments allow precise movement and positioning in your application. A few applications that Nexen’s gears have been used in are:

• Cutting Systems
• Gantry Systems
• Medical Products
• Robotics
• Aerospace
• Machine Tool
• Semiconductor
• Material Handling

Gearheads

Revolutionize Your Design with Nexen’s Compact and Precise Harmonic Gearhead