Axial feed unit

[Dave ©]

Bit of a long shot but has anyone got a axial feed unit or something that can feed a rotating shaft?

I'm trying to make a line boring setup to do my crank bearing on a half size .

Thanks

[The Pirate]

What about using a cylinder boring machine - van norman or similar, used on I.C. engines?
I have such a thing if it's of any use.
It's presently on loan to someone, but easily fetched back if needs be.

[ShottendenAveling]

Dave,

Having looked at the commercial line boring equipment available from the US, a lot of them are based simply on mag-based drills, with an arbor with the single point cutter moved by action of the magdill handle. At least one of the companies reckons that a bungee cord provides a reasonable feed, its not exactly smooth/accurate control but probably good enough. Its the approach we plan to take when line boring out the third-shaft bearings on the Aveling.

pic here:

http://www.tractiontalkforum.com/sho...ht=line+boring


Dave

[Dave ©]

I have been looking online most of today to try to find a cylinder boring machine with no luck at a suitable price. Trystans offer could well be just the job!

A mag drill did through my mind which you have now confirmed; I don’t have a mag drill one could easily be purchased second hand from eBay.

The advantage of borrowing Trystans cylinder borer would be the inbuilt feed

This may be a stupid question but what sort of support bearings are normally used as the shaft has to rotate and move forwards?

Thanks for the help and ideas.

Dave