LAPPING TECHNIQUE

[INTERPOLATE]

Greetings group.
I need to take a few tenths off of a radius groove on a hardened steel shaft. What is the best way? I figured lapping. Would I turn a rod of brass to the diameter of the groove and use lapping compound, work in held in lathe running slow, brass rod held in groove?
Is there some sort of strip of material that is used with lapping compounds that is like plumbers sand paper for preping pipes for soldering.
Thanks folks!

[Ragarsed Raglan]

How about a diamond hone rat tail laid in the base of the groove? Run the lathe in reverse (safty issue - it will pull the hone away from you should it 'dig' in), and regularly clean the hone with an eraser.

RR

[This message has been edited by Ragarsed Raglan (edited 03-13-2003).]

[Rotate]

Your idea with the brass rod and lapping compound will work.

Another solution is to use rubberized abrasive point (Cratex). You have very good control over how much material is removed and it leaves a very shiny surface. I love this stuff.

Albert

[jfsmith]

I use large cotter keys and sand paper to do my inside lapping. I use my drill press and keep the speed down.

For doing large diameters, I have a brake hone, that works will, just chuck it up and let it go slow.

Jerry