ZERO BACKLASH GEARING
30Pages

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.

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...

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....

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: Geared Bearing Selected STEP 2: SELECT GEARED BEARING Enter application requirements: Starting with...

STEP 3: CALCULATE 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 Nm (TBd) using calculations provided on Pages 20 & 21 Bearing Drag 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. I_ Total Required Gear Torque STEP 5: VERIFY TOTAL GEAR TORQUE Verify the Total Required Gear Torque calculated in STEP 4 is less than...

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

(1) Load types are mutually exclusive for comparison purposes. For combined loads & high loads, see Bearing Load Section. 8

Geared Bearing Dimensions & Specifications by Product Number

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...

Geared Bearing Specifications by Product Number (1) Load types are mutually exclusive for comparison purposes. For combined loads & high loads, see Bearing Load Section.

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. Common Attributes for All Gears

System Reaction Forces Under Maximum Torque Condition Radial Force Separation (Resultant) Force Tangential Thrust Force Pressure Angle r iw Calculating RPS Geared Bearing Reaction Loading The calculations in the following section will allow you to calculate the Reaction Loading of the Geared Bearing & Pinion. These calculations will be nessesary to calculate the System Life on the following pages. Due to the unique rolling technology in the RPS system the pressure angle changes throughout the motion. Therefore, Nexen has provided both the average and maximum separation force and radial load...

STEP 1: GATHER APPLICATION DATA Before you begin calculations, there are several key measurements that you will need from your application in order to calculate static safety factor. Collect the data and record it in the space provided. Sample: fS = 2.49 ^ Sufficient safety factor for impact loads.

STEP 1: GATHER APPLICATION DATA Before you begin calculations, there are several key measurements that you will need from your application in order to calculate drag torque. Collect the data and record it in the space provided. Measurements for Bearing Calculations Table 3 Bearing Race Specific Data MAXIMUM DYNAMIC EQUIVALENT RADIAL LOAD Maximum Dynamic Equivalent Radial Load Loading Distribution

Bearing Drag Torque Calculations STEP 3: DETERMINE BEARING DRAG TORQUE The bearing drag torque can be estimated based on the dynamic equivalent radial load. Use the following charts to determine your approximate bearing dragRadial Load vs. bearing drag torque to the application required gear torque to Dynamic Equivalent torque. Add Drag Torque determine the total torque requirement. Verify your chosen geared bearing is still capable for the application. 250 Bearing Drag Torque (Nm) Bearing Drag Torque (Nm) MAXIMUM DYNAMIC EQUIVALENT RADIAL LOAD DragDRAG TORQUE Dynamic Equivalent Radial Load...