- 75 mm Diameter Hub
- Can Be Threaded to Fit Any Spindle Nose Thread Up to 2.5″
- 3/8″ Smooth Pilot Hole
- Can Be Used for Most 6″, 5″, or 4″ Lathe Chucks
- 6″ (160 mm) in Diameter and Has No Chuck Mounting Holes
Cast iron lathe chuck adapter has a 75 mm diameter hub and can be threaded to fit any spindle nose thread up to 2.5″. It has a 3/8″ smooth pilot hole.
This adapter can be used for most 6″, 5″ or 4″ lathe chuck.
This adapter is 6″ (160 mm) in diameter and has no chuck mounting holes. Use it for all 5″ and 6″ chucks.
*NOTE* These adapters require machining on the lathe on which they will be used.
Instructions are included for final turning of the registration diameter on your lathe to ensure perfect concentricity.
| Nominal Size | 6″ |
| Outside Diameter | Ø 6.3″ (160 mm) |
| Thread | 10 mm Smooth Bore |
| Bolt Holes | None |
| Hub Diameter | Ø 2.2″ (56 mm) |
| Hub Length | Ø 0.9″ (24 mm) |
| Flange Thickness | Ø 0.6″ (16 mm) |
| Registration Boss | Ø 0.2″ (4 mm) |
| Registration Diameter | Ø 5.1″ (130 mm) |
![PROFRAME HELMET MATTE [BLK] L](https://www.bestfixhardwareus.com/wp-content/uploads/2026/09/proframe-helmet-matte-blk-l.webp)
