Lathe Chuck Threaded Adapter Dimensions
This page provides the dimensions of the threaded lathe chuck backplate adapters that we sell. In most cases the registration boss needs to be turned down to the diameter shown. This ensures concentricity on your lathe, but pretty much precludes the use of these adapters on wood lathes.
| PN | Nominal Size |
Outside Diameter |
Thread | Bolt Holes |
Bolt Size |
Bolt Circle |
Hub Diameter |
Hub Length |
Flange Thickness |
Registration Boss |
Registration Diameter |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2022 | 3" | 80mm | 0.5"-20 | 3 | M6 | 66mm | 50mm | 19mm | 16mm | 3mm | 57mm |
| 1920 | 3" | 80mm | 0.75"-16 | 6 | M6 | 66mm | None | None | 12mm | 3mm | 55mm |
| 1916 | 4" | 100mm | 1"-8 | 3 | M8 | 84mm | 56mm | 10mm | 16mm | 3mm | 72mm |
| 1790 | 4" | 100mm | 1"-8 | None | 56mm | 10mm | 16mm | 3mm | 72mm | ||
| 1917 | 4" | 100mm | 1"-10 | 3 | M8 | 84mm | 56mm | 10mm | 16mm | 3mm | 72mm |
| 1791 | 4" | 100mm | 1"-10 | None | 56mm | 10mm | 16mm | 3mm | 72mm | ||
| 1918 | 4" | 100mm | 1.5"-8 | 3 | M8 | 84mm | 56mm | 14mm | 16mm | 3mm | 72mm |
| 1792 | 4" | 100mm | 1.5"-8 | None | 56mm | 14mm | 16mm | 3mm | 72mm | ||
| 1921 | 4" | 100mm | M39x4 | None | 56mm | 24mm | 16mm | 3mm | 72mm | ||
| 2335 | 4" | 100mm | 10mm smooth bore |
None | 56mm | 24mm | 16mm | 3mm | 72mm | ||
| 2331 | 5" | 125mm | 1"-8 | None | 56mm | 10mm | 16mm | 4mm | 100mm | ||
| 2333 | 5" | 125mm | 1"-10 | None | 56mm | 10mm | 16mm | 4mm | 100mm | ||
| 2332 | 6" | 160mm | 1"-8 | None | 56mm | 10mm | 16mm | 4mm | 130mm | ||
| 2334 | 6" | 160mm | 1"-10 | None | 56mm | 10mm | 16mm | 4mm | 130mm | ||
| 1919 | 6" | 160mm | 1.5"-8 | None | 56mm | 14mm | 16mm | 4mm | 130mm | ||
| 5126 | 6" | 160mm | 1.75"-8 | None | 56mm | 24mm | 16mm | 4mm | 130mm | ||
| 1923 | 6" | 160mm | 2.25"-8 | None | 75mm | 16mm | 16mm | 4mm | 130mm | ||
| 1922 | 6" | 160mm | M39x4 | None | 56mm | 24mm | 16mm | 4mm | 130mm | ||
| 2336 | 6" | 160mm | 10mm smooth bore |
None | 56mm | 24mm | 16mm | 4mm | 130mm |