Shopmade Vacuum Chucks
Oneway Mfg. sells Taper-Lock adaptors (available in numerous spindle-thread sizes) that screw onto the headstock to hold Oneway chucks. This adaptor is also useful as the base for a shopmade vacuum chuck.
The three vacuum chucks in the photo are all simple-turned wooden cylinders of differing diameters—I use them to support smaller pieces while I finish the bases. (The Oneway 3" [76 mm] aluminum drum chuck is shown for comparison.) The wooden cylinder fits snugly over the sleeve of the metal adaptor and is glued on with CA glue. Oneway sells a sticky-backed neoprene ring that is cut to size to fit the top end of the vacuum chuck where it contacts the piece. Their largest neoprene ring is 12" diameter and is 1¾" (44 mm) wide (Part 3662).
The accompanying photo shows one of these chucks being used to support a small vase form prior to turning away the tenon and finishing the base.
If you do not have a vacuum set-up, these shopmade chucks are useful as mandrels to support small pieces held at the tailstock end by a small residual stub, which is removed later with a carving tool.
~ Malcolm Zander