Hello folks, (posted on general board plus here)
Can anyone provide the correct name or DIN classification of the two styles of collets commonly supplied with Thiel 158-s machines back in the day.*
The main one having a 31mm body diameter, 40 degree incl angle on the tapered nose and an acme 18tpi external draw thread on the tail end. Anti-rotation by way of a dogpoint key as in an R8 or 5C spindle nowadays.
A further reducing sleeve was supplied with the vertical head reducing to a smaller collet of similar overall appearance, albeit with a 24mm body diameter and (I assume) an internal drawbar thread like an R8. This assumption because the reducing sleeve itself was retained by the draw tube with its 18tpi acme thread.
The spindles themselves are both MT5. Whilst I have made new spindle adapters to accomodate 40 taper tooling for convenience, I am still curious if the original collets have a modern equivalent.
That aside, since acquiring the little 158, it has been a sturdy and useful addition to the shop, both for customer work and for my own playtime toolmaking activities and making machine and workholding accessories. Nice to add the Deckel-type mill to the big dial type Cinncinatti here.
Gerard
Can anyone provide the correct name or DIN classification of the two styles of collets commonly supplied with Thiel 158-s machines back in the day.*
The main one having a 31mm body diameter, 40 degree incl angle on the tapered nose and an acme 18tpi external draw thread on the tail end. Anti-rotation by way of a dogpoint key as in an R8 or 5C spindle nowadays.
A further reducing sleeve was supplied with the vertical head reducing to a smaller collet of similar overall appearance, albeit with a 24mm body diameter and (I assume) an internal drawbar thread like an R8. This assumption because the reducing sleeve itself was retained by the draw tube with its 18tpi acme thread.
The spindles themselves are both MT5. Whilst I have made new spindle adapters to accomodate 40 taper tooling for convenience, I am still curious if the original collets have a modern equivalent.
That aside, since acquiring the little 158, it has been a sturdy and useful addition to the shop, both for customer work and for my own playtime toolmaking activities and making machine and workholding accessories. Nice to add the Deckel-type mill to the big dial type Cinncinatti here.
Gerard