4910 Series Aluminum Clamping Collar (8mm REX ID x 20mm OD, 9mm Length)

Competition eligibility

Legal for FIRST Tech Challenge (FTC) and FIRST Robotics Competition (FRC). Eligibility is set by each season's game manual — check the current rules before you compete.

This 8mm REX Bore Clamping Collar has a profile-matched bore in order to maximize holding force on the 8mm REX Shaft. The 11mm diameter, 0.25mm protrusion on one side of the collar negates the need for a shim or shaft spacer between the collar and a bearing. The protrusion will rest against the inner-race of the bearing, creating a little necessary space between the collar and the outer-race. The M4 pinch bolt uses the same tool as you’ll use with 4800 Series Socket Head Screws that we use throughout the build system.

Technical drawing