Radially Assembled, External E, Metric Perhaps the most popular and widely used radial retaining ring is the “E” (so named because it is shaped like the letter “E”). Three prongs make contact with the bottom of the groove and provide a shoulder for effective retention of assemblies. Clearance Diameter Installed In Groove Ring Measurements Shaft Diameter & Groove Dimensions Maximum Corner Radius & Chamfer Edge Margin (Y) The radius “R” on the load side must not exceed 0.1T. Installation tools can be found at rotorclip.com/pliers_tools_applicators_kits For the most up-to-date specifications, online ordering, quotations & sample orders, visit www.roto