Zero backlash gearing catalog

Product catalog summary

Features & Benefits
Nexen's Geared Bearing utilizes Roller Pinion technology to deliver zero backlash, high indexing precision, and substantial output load capacity. It supports speeds up to 632 RPM, making it suitable for applications in robotics and medical products.

Selection Process
The selection process involves assessing application requirements, choosing the appropriate geared bearing, calculating bearing drag torque, verifying total gear torque, determining bearing load capacity, and confirming system life. This ensures optimal product selection tailored to specific application needs.

Selection Tables
These tables provide detailed specifications for various RPS sizes, including dynamic max gear torque, gear OD size, accuracy, gear ratio, and number of teeth, aiding in the selection of the right product based on application requirements.

Dimensions & Specifications
Specifications include static and dynamic torque, maximum speed, angular accuracy, and load capacities. Information on the moment of inertia for different product numbers is also provided.

Reaction Loading
Details on how the geared bearing manages reaction loads, ensuring stability and performance under various conditions.

Bearing Load Capacity
Specifications and calculations for determining the bearing's load capacity to ensure it meets application demands.

Bearing Drag Torque
Information on calculating the drag torque of the bearing, crucial for understanding system efficiency and performance.

System Life
Guidelines for calculating the life expectancy of the RPS pinion and bearing, ensuring the system meets longevity expectations.

Specifications
The document provides detailed specifications for calculating total required gear torque, bearing drag torque, and pinion roller contacts, including tables with maximum torque values and life contacts for various RPS sizes.

Procedures
1. Gather Application Data: Collect key measurements such as average pinion torque, pinion revolutions per cycle, and average pinion speed.
2. Calculate Total Number of Pinion Contacts: Use the gathered data to determine the expected life of the geared bearing and pinion.
3. Calculate Total Number of Tooth Contacts: Perform calculations using application data and provided tables to determine gear tooth contacts.
4. Convert Roller Contacts to Hours, Meters, or Revolutions: Use exact calculations for precise results.

Norms and Standards
The document references ISO 9001 certification and emphasizes adherence to Nexen's policy of constant product improvement.

Recommendations
For applications with temperatures exceeding the normal service temperature of 80°C, it is recommended to contact Nexen for guidance.

Data Interpretation
Tables and graphs provide insights into the life expectancy of pinion and gear systems under various loads and conditions, including life graphs for different RPS systems.

Critical Information
- Maximum torque and life values for different RPS sizes.
- Calculations for bearing race life in revolutions and hours.
- Importance of using exact calculations for determining service life.

Contact Information
Nexen Group, Inc. provides contact details for technical support and further information.

Catalog excerpts

ZERO BACKLASH GEARING Based on Nexen’s innovative Roller Pinion technology, the Geared Bearing comes complete with a gear and a precision grade, high capacity bearing. With a wide range of sizes and ratios, all with zero backlash, a Geared Bearing can fit in any application.

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Zero Backlash Gearing Advantage 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. 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. • High Indexing Precision With an indexing precision as low as ± 30 ArcSec and repeatability as low as ± 5.0 ArcSec, Nexen’s Geared Bearing offers unmatched mechanical system capabilities....

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AT THE CORE OF A ROTARY SYSTEM Large Open Center The Geared Bearing has a large open center that allows users to easily mount equipment and cabling in the center of the rotating output. Mounting Options Threaded and thru hole mounting and piloting options ensure a Nexen Geared Bearing can be incorporated into any application. High Capacity Bearing The Geared Bearing has a High Capacity Cross Roller Bearing capable of supporting significant loads at multiple mounting configurations. Drive Flexibility Pinions are available from Nexen that are compatible with many manufacturer's gearboxes. High...

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Geared Bearing Selection Process The Nexen Geared Bearing product line offers many solutions to ensure there is an option that optimizes your needs. Because there is a unique interaction between the gear, bearing, applied load and applied torque, optimizing your selection is a multiple step process. Below Nexen has created steps to assist in ensuring all application aspects are considered to end up with the best solution for the application. STEP 1: DETERMINE APPLICATION REQUIREMENTS: Application Requirements for Geared Bearing Selection Customer Data (record your values below) Maximum Static...

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STEP 3: CALCULATE BEARING DRAG TORQUE Bearing Drag Torque With a Geared Bearing selected, refer to Specifications section to find the bearing number associated with it. Calculate the chosen product's Bearing Drag Torque (TBD) using calculations provided on Pages 20 & 21 Total Required Gear Torque STEP 4: CALCULATE TOTAL GEAR TORQUE REQUIRED Using the application torque and bearing drag torque, calculate the chosen product's Total Gear Torque using calculations provided on Page 21. STEP 5: VERIFY TOTAL GEAR TORQUE Verify the Total Required Gear Torque calculated in STEP 4 is less than the Max...

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Geared Bearing Selection Gear Ratio Accuracy (±ArcSec) Dynamic Max Gear Torque (Nm) Product Number Accuracy (±ArcSec) Dynamic Max Gear Torque (Nm) Product Number Accuracy (±ArcSec) Dynamic Max Gear Torque (Nm) Product Number Accuracy (±ArcSec) Dynamic Max Gear Torque (Nm) Product Number

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Geared Bearing Selection Gear Ratio Accuracy (±ArcSec) Dynamic Max Gear Torque (Nm) Product Number Gear Ratio Accuracy (±ArcSec) Dynamic Max Gear Torque (Nm) Product Number Gear Ratio Accuracy (±ArcSec) Dynamic Max Gear Torque (Nm) Product Number Gear Ratio Accuracy (±ArcSec) Dynamic Max Gear Torque (Nm) Product Number

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Geared Bearing Specifications by Product Number RPS 10 Dynamic Torque at MIN Life (Nm) Dynamic Torque at MAX Life (Nm) Moment of Inertia INNER (kg/m2) Moment of Inertia OUTER (kg/m2) Module of Gear Teeth (mm) Max Lube-Free Speed (RPM) Angular Accuracy (±ArcSec) One-Way Repeatability (±ArcSec) Angular Backlash (±ArcSec) Max Dynamic Moment Load @ Max Life & (1) Avg Torque (kNm) Max Dynamic Radial Load@ Max Life & (1) Avg Torque (kN) Max Dynamic Axial Load @ Max Life & (1) Avg Torque (kN) Bearing Number Gear Ratio Gear Torque Product Number General Specs Load types are mutually exclusive for comparison...

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Geared Bearing Dimensions & Specifications by Product Number RPS 10 OVERALL HEIGHT GREASE FITTINGS 2 AT 180° SECTION A-A Dimensions shown in mm unless otherwise noted. Basic gear dimensions shown for selection purposes only and subject to change. Go to www.nexengroup.com for detailed drawings and CAD models. If none of the products below meet your needs, contact Nexen and one can be designed to your specifications. Please contact Nexen for lead times. System Reaction Forces Under Maximum Torque Condition Radial Force (Resultant) Separation Force Tangential Thrust Force Pressure Angle Common Attributes...

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Geared Bearing Specifications by Product Number RPS 12 Static Torque (Nm) Dynamic Torque at MIN Life (Nm) Dynamic Torque at MAX Life (Nm) Moment of Inertia INNER (kg/m2) Module of Gear Teeth (mm) Max Lube-Free Speed (RPM) Angular Accuracy (±ArcSec) One-Way Repeatability (±ArcSec) Angular Backlash (±ArcSec) Max Dynamic Moment Load @ Max Life & (1) Avg Torque (kNm) Max Dynamic Radial Load@ Max Life & Avg Torque (kN) (1) Max Dynamic Axial Load @ Max Life & (1) Avg Torque (kN) Moment of Inertia OUTER (kg/m2) Bearing Number Gear Ratio Gear Torque Product Number General Specs Load types are mutually...

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Geared Bearing Dimensions & Specifications by Product Number RPS 12 OVERALL HEIGHT GREASE FITTINGS 2 AT 180° SECTION A-A Dimensions shown in mm unless otherwise noted. Basic gear dimensions shown for selection purposes only and subject to change. Go to www.nexengroup.com for detailed drawings and CAD models. If none of the products below meet your needs, contact Nexen and one can be designed to your specifications. Please contact Nexen for lead times. System Reaction Forces Under Maximum Torque Condition Radial Force (Resultant) Separation Force Tangential Thrust Force Pressure Angle Common Attributes...

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Geared Bearing Specifications by Product Number RPS 16 Dynamic Torque at MIN Life (Nm) Dynamic Torque at MAX Life (Nm) Moment of Inertia INNER (kg/m2) Moment of Inertia OUTER (kg/m2) Module of Gear Teeth (mm) Max Lube-Free Speed (RPM) Angular Accuracy (±ArcSec) One-Way Repeatability (±ArcSec) Angular Backlash (±ArcSec) Max Dynamic Moment Load @ Max Life & (1) Avg Torque (kNm) Max Dynamic Radial Load@ Max Life & (1) Avg Torque (kN) Max Dynamic Axial Load @ Max Life & (1) Avg Torque (kN) Bearing Number Gear Ratio Gear Torque Product Number General Specs Load types are mutually exclusive for comparison...

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