Description
The AC108 is a ball bearing rub collar — 2-3/16-inch outer diameter, 3/4-inch bore, 7/16-inch thick — for 3/4-inch bore shaper spindles. The 2-3/16-inch OD is a medium size in the 3/4-inch bore rub collar series, suited to shaper cutter setups where the cutter stack diameter is in the mid-range and the rub collar needs to match a specific template or fence offset. The precision ball bearing design keeps the collar stationary against the guide surface while the cutter rotates above. Mounts on 3/4-inch spindles (Schmidt Mini-Pro series and compatible machines). For smaller OD in the 3/4-inch bore series, see AC106 and AC107. For larger OD, see AC109 (2-15/16 inch) and AC109A (3-1/8 inch).

