Description Compatible with 4″ 3-Jaw Lathe Chuck on Mini Lathes Use with Chucks with a 70 mm Registration Recess Diameter Works on Spindles with Only 3 Holes Fits Bison 4″ 3-Jaw chucks This adapter lets you mount a 4″ 3-jaw lathe chuck on your mini lathe. Use this adapter with chucks that have a 70 mm registration recess diameter such as Bison 4″ 3-Jaw chucks. The adapter mounts to the 3-hole pattern on the spindle so it works on spindles with only three holes. Specifications Outside Diameter Ø 3.9″ (100 mm) Center Hole Ø 1.0″ (25 mm) Spindle Side Registration Recess Ø 2.2″ (55 mm) Spindle Side Bold Circle Ø 2.6″ (66 mm) Chuck Side Registration Boss Ø 2.8″ (70 mm) Chuck Side Bolt Circle Ø 3.3″ (83 mm) Chuck Mounting Holes 6
