I'm guessing you mean something that will act to limit the movement of stock back into the spindle hole so that you can have a repeatable amount of stock sticking out of the chuck or collet?
Here's an idea:
- An expanding mandrel. Six major pieces to the concept. The mandrel itself is two parts. The outer piece is a square cylinder fit to the ID size of the spindle and slit about three-quarters of its' length at several (six or eight) equally-spaced locations. The ID of this piece is bored at a slight taper to match the OD of another piece that is threaded to a long hollow (more on that later) rod that will extend out the left end of the spindle and be centered in the left end of the spindle. It would fix to the end of the spindle with three setscrews tapped through the unthreaded end of the spindle. Alternatively, this left-end piece could be counter-bored (trepanned or made of two pieces) to fit both into and over the left end of the spindle and the piece fitted with three tapped holes for setscrews that would bear on the OD left end of the spindle.
Now through the hollow rod goes another threaded rod that fits threads in both ends of the hollow rod. This is your "stop" rod. Final adjustment can be made and secured with locking nuts on the left end.
Oh, you will need a loose thin-walled spacer that fits over the OD of the hollow rod and serves to secure the axial location of the outer expanding mandrel sleeve while you tighten it up.
To minimize the left-end "over-hang" and potential whipping, you can make up several stop rods of varying lengths to accomodate the range of lengths you might need.
Some of these parts can be made of aluminum.
This would be a nice little project but it's enough work that I would have to have a fair amount of work needing it before I'd spend the time on it.
OK, Monday morning ruminations. Anybody want to shoot holes in it or got a better way for a permanent solution?
Ed in Florida
--- In firstname.lastname@example.org, Shang Hyd <shanghyd@...> wrote:
> Hi all,
> I have a southbend heavy 10. I need a spindle stop. Does anyone have a print of one that I can make? Any suggestions about how to fix the stop in the spindle.
> At the moment I am using a PVC pipe and electrical tape on the end. The tape is wound on thin at the begining and then thicker so it forms a taper. It presses in the spindle and worked very well for the job I was doing. I want a permanent solution though. Something that I can tighten up and it will expand and grip the inside of the spindle.
> Hotmail: Trusted email with powerful SPAM protection.