150x19x20mm Hex-Bore Buffing Wheel: Stocked Now, Other Sizes to Order

The 150 x 19 x 20 mm hexagon-bore buffing wheel is now held as a stocked size. It is a layered white cotton wheel with a 150 mm outside diameter, a 19 mm hexagon bore cut through a metal hub, and a 20 mm face width, packed one wheel per cardboard box.

Anything outside those three numbers is made to order: other outside diameters, other face widths, and other inner-hole shapes. That covers the older edgebanders still running in workshops where the original wheel is no longer listed by the machine maker.

Three numbers are enough to quote, and all three can be read off the worn wheel with a caliper:

• Outside diameter, measured across the full face of the cotton
• Bore, measured across the hole, noting whether it is six-sided or round
• Face width, measured across the cotton and not across the hub

A part number from another supplier is not needed, and often does not exist for a discontinued machine. The wheel on the spindle is the specification.

Standard lead time is 5-8 work days. Stocked sizes ship from Guangdong, China, one wheel per cardboard box, so a spare can sit on the shelf next to the machine until it is needed.

Made-to-order sizes follow the same packing, and the drawing is confirmed before the run starts, because a bore that is measured across the corners instead of the flats produces a wheel that will not seat.

Polishing spindles on many CNC edgebanders are hexagonal, and the drive is carried on the six flats. A round bore of the same 19 mm will slide on, and that is exactly why the mistake is easy to make. Under load it slips, the bore wears open, and the wheel stops running true.

When ordering, state the bore shape together with the size. It is the one dimension that is rarely written on the old wheel and the one that decides whether the part works.