Precision Motion Control User Manual Precision Ring Drive

In accordance with Nexen's established policy of constant product improvement, the specifications contained in this manual are subject to change without notice. Technical data listed in this manual are based on the latest information available at the time of printing and are also subject to change without notice. This document is the original, non-translated, version. Conformity Declaration: In accordance with Appendix II B of CE Machinery Directive (2006/42/EC): A Declaration of Incorporation of Partly Completed Machinery evaluation for the applicable EU directives was carried out for this product...

General Safety Precautions ---------------------------------------------------------------------------------------------------- 4 System Design Overview ------------------------------------------------------------------------------------------------------- 5 Mounting Surface Details ------------------------------------------------------------------------------------------------------- 6 Installation Instructions ---------------------------------------------------------------------------------------------------------- 7 Lubrication ---------------------------------------------------------------------------------------------------------------------------...

General System Requirements • The dial plate must be included in all loading calculations. • The dial plate must be designed such that it will rigidly mount to the ring drive using all provided fasteners, take caution to ensure the dial plate has adequate clearance over the ring drive components (i.e. the guard, pinion, etc). • Make sure the machine design is rigid enough to avoid deflection that could affect the ring drive system. • The Precision Ring Drive (PRD) requires periodic lubrication and should use the grease offered on Nexen’s website as an accessory to the RPS/RPG products...

MOUNTING SURFACE DETAILS The surface used to mount the PRD should be machined to a flatness of .050mm as shown to ensure proper alignment. See Figure 1. All provided provisions for fasteners should be utilized. Make sure there is proper clearance around the gearbox as seen in Figure 1. Clearance Required

Ring Drive Mounting Nexen recommends removing the guards before installation. The mounting holes are accessible thru the guard, but removing the guard will make the process easier. 1. First remove the pinion guard by removing the six M6 fasteners. See Figure 2. 2. To remove the gear guard, the multiple M6 fasteners are accessible around and between the gear teeth from the top. See Figure 2. Take extreme caution near the gear teeth as they may be damaged by contacting them with a tool. 3. Position the ring drive on the customer supplied mounting surface. The size 400 can be lifted using the threaded...

LUBRICATION Pinion The pinion needle bearings are sealed and lubricated for life and cannot be serviced. Gear Nexen recommends lubricating the gear teeth every 2 million pinion revolutions or 6 months, but it may need to be lubricated more frequently based on the application conditions, and observable tooth or roller wear. When lubricating the PRD system inspect the pinion rollers and gear teeth for any abnormal wear patterns and ensure the pinion rollers are not seized or have excessive play. Wear on the edges of the gear teeth (not uniform across the tooth face) or rings on the rollers indicate...

The PRD is delivered with proper preload from the factory. If adjusting the preload is required, a tool can be purchased from Nexen to aid in this process. The Nexen preloader is configured as shown below in Figure 4. To ensure optimal meshing of the roller pins with the gear teeth, the shaft must be preloaded to 0.010 - 0.015 mm [0.0004 - 0.0006 in] beyond full roller/ tooth root engagement. NOTE: Do not apply excessive preload. Preloading beyond 0.015 mm [0.0006 in] will decrease product life, increase noise, and cause vibration. When the PRD system is properly preloaded, there will be no tangential...

WARRANTY Warranties Nexen warrants that the Products will (a) be free from any defects in material or workmanship for a period of 12 months from the date of shipment, and (b) will meet and perform in accordance with the specifications in any engineering drawing specifically for the Product that is in Nexen’s current product catalogue, or that is accessible at the Nexen website, or that is attached to this Quotation and that specifically refers to this Quotation by its number, subject in all cases to any limitations and exclusions set out in the drawing. NEXEN MAKES NO OTHER WARRANTY, EXPRESS...