Bolt on Lathe Chuck Adapter and Backplate 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.
Bolt on Adapters
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| PN |
Outside Diameter D |
Through Hole Diameter E |
Thickness F |
Spindle Side Bolt Circle G |
Chuck Side Bolt Circle G' |
Chuck Mounting Holes |
Thread H |
Chuck Mounting Holes Counter Bore Depth |
Registration Recess | Registration Boss | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Diameter J |
Depth K |
Diameter M |
Extension P |
|||||||||
| 1692 | 100mm | 25mm | 20mm | 66mm | 84mm | 3 & 4 Bolt Patterns | M6 | 8.0mm | 55mm | 3.5mm | 72mm | 3.5mm |
| 2426 | 102mm | 25mm | 20mm | 66mm | 84mm | 3 | M6 | 8.0mm | 55mm | 4.0mm | 70mm | 3.5mm |
| 2347 | 125mm | 30mm | 20mm | 66mm | 108mm | 6 | M6 | 8.8mm | 55mm | 4.0mm | 95mm | 3.5mm |
| 2358 | 125mm | 30mm | 20mm | 66mm | 108mm | 6 | M6 | 8.0mm | 55mm | 3.5mm | 92mm | 3.0mm |
| 2961 | 125mm | 30mm | 20mm | 84mm | 108mm | 6 | M8 | 8.0mm | 72mm | 3.5mm | 95mm | 3.0mm |
| 3151 | 125mm | 30mm | 20mm | 84mm | 108mm | 6 | M8 | 8.0mm | 72mm | 3.5mm | 95mm | 3.0mm |
| 4912 | 165mm | 50mm | 20mm | 84mm | 142mm | 3 | M8 | 8.0mm | 72mm | 3.5mm | 130mm | 3.0mm |
| 6806 | 52mm | 108mm | None | None | 95mm | |||||||
| 6741 | 125mm | 52mm | 22mm | 75mm | 108mm | 3 | M10 | None | None | None | 95mm | 3.2mm |
| 6727 | 160mm | 52mm | 18mm | 75mm | 142mm | 6 | M10 | 9.0mm | None | None | 130mm | 3.0mm |
Generic Backplate Adapters
| LMS P/N |
Outside Diameter D |
Through Hole Diameter E |
Thickness F |
Bolt Circle G |
Thread H |
Registration Recess | Registration Boss | ||
|---|---|---|---|---|---|---|---|---|---|
| Diameter J |
Depth K |
Diameter M |
Extension P |
||||||
| 4769 | 100mm | 25mm | 20mm | 66mm | M6 | 55mm | 3.40mm | 73.5mm | 3.9mm |
| 4770 | 125mm | 32mm | 20mm | 66mm | M6 | 55mm | 3.40mm | 96.5mm | 3.9mm |
| 4771 | 125mm | 32mm | 20mm | 84mm | M8 | 72mm | 3.40mm | 96.5mm | 3.9mm |
| 4772 | 160mm | 45mm | 20mm | 84mm | M8 | 72mm | 3.40mm | 131.5mm | 3.9mm |