Pro-Line Rub Collar, 4-1/8″ OD

The 4-1/8″ outside diameter sits one increment above the 4″ collar, offering fine-grained depth adjustment at the large-profile end of the Pro-Line range. In passage door and raised panel production, where panel height and reveal proportions are visible in the finished piece, stepping depth in 1/8″ increments at the 4″ range means getting the design right rather than settling for close enough. Sealed ball-bearing construction handles large Pro-Line cutter loads at shaper speed without maintenance. Freeborn’s close bore machining ensures the transition from the 4″ to the 4-1/8″ collar changes only the OD — spindle fit and runout remain consistent. Stock this size alongside the 4″ collar in shops running large-format raised panels to fine-tune panel height without adjusting the fence.