- Joined
- Dec 14, 2015
- Messages
- 19
I recently salvaged this nicely boxed tool from a discard pile at work and wondered if anyone had any definitive answers about what it is and how it works.
It looks to me like a valve and valve seat cutting tool with 5 seat cutters ranging from 1-9/16" up to 2-9/16". All look to be 45 degree cutters and fit to the tee handle on a taper. An inside taper on the tee handle shaft accommodates a variety of spindle sizes to align the tool in the valve guide. These pins are removable with a tapered drift. It is not entirely clear how the red casting is used. It is clear that it holds the valve cutters which are prevented from rotating with a pair of flats. The 5 collars housed beside the cutters are tapered to fit inside the valve cutters to align on the valve stems. It looks like the lug on the casting is for clamping into a vice but it is not clear to me how the valve is rotated or which way round the valve cutter goes in the tool (or what the spring and the threaded adjustment is for). I think that perhaps the valve stem gets held in a lathe chuck or an electric drill and the spring applies load to the head of the valve to do the cutting. The cutters are marked "Made in England".
If it is for automotive valves then it dates from a time before multi-angle valve seats became standard practice for performance engine building. There is a chance that it was designed for some sort of industrial valve but I think that automotive is more likely. It won't be a lot of use for my current vintage project - the valves on an Austin 7 are too tiny for this to be useful.
If anyone knows more about this tool or has an instruction manual for it I'd love to know.
Merry Christmas
It looks to me like a valve and valve seat cutting tool with 5 seat cutters ranging from 1-9/16" up to 2-9/16". All look to be 45 degree cutters and fit to the tee handle on a taper. An inside taper on the tee handle shaft accommodates a variety of spindle sizes to align the tool in the valve guide. These pins are removable with a tapered drift. It is not entirely clear how the red casting is used. It is clear that it holds the valve cutters which are prevented from rotating with a pair of flats. The 5 collars housed beside the cutters are tapered to fit inside the valve cutters to align on the valve stems. It looks like the lug on the casting is for clamping into a vice but it is not clear to me how the valve is rotated or which way round the valve cutter goes in the tool (or what the spring and the threaded adjustment is for). I think that perhaps the valve stem gets held in a lathe chuck or an electric drill and the spring applies load to the head of the valve to do the cutting. The cutters are marked "Made in England".
If it is for automotive valves then it dates from a time before multi-angle valve seats became standard practice for performance engine building. There is a chance that it was designed for some sort of industrial valve but I think that automotive is more likely. It won't be a lot of use for my current vintage project - the valves on an Austin 7 are too tiny for this to be useful.
If anyone knows more about this tool or has an instruction manual for it I'd love to know.
Merry Christmas
actually a set of 5 different sizes...
