Nexen PRD750 966901 - Manual (Page 5)

5 FORM NO. L-21265-B-0312
SYSTEM DESIGN OVERVIEW
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• 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 or equivalent lubrication described in the lubrication
section.
• Large Temperature swings can affect performance of the PRD; ideal temperature range is –5 to 40 C.
• The PRD gear and pinion are surface treated with Raydent®, Armaloy®, or Nickel Plating (with the exception
of the pinion rollers that consist of bearing grade steel), and will have moderate corrosion resistance. Pinion
roller corrosion will lead to pinion needle bearing damage and then system failure. Always protect the pinion
from adverse conditions. If the PRD system comes with other coatings, consult the product specifications
for performance. Review surface treatment product specifications for corrosion resistance performance,
and determine whether the PRD system is suitable for your application based on your familiarity with the
corrosion resistant surface treatment or thorough testing. Nexen makes no claims for PRD corrosion
resistance in any application.