Munkul
Jack of some trades, Master of none
- Messages
- 7,366
- Location
- Cumbria
I know what number the chuck is, it has the original Pratt number stamped in. Its a 250mm iron super precision 3jaw.Rotagrip are excellent in this regard. if you can tell them the tooth pitch (they will explain how to measure them) and the slot dimensions.
I am confident they will be able to workout what number the chuck is.