Don't know a lot about machining, but here's what I want:


Parts A & B make from 1" dia. SS or aluminum rod (rust resistant);
& must be uniform in dia. +/- .002" or better and very straight.

With spec as above, I would need:

Part A - 1.000 x 6-7" long with a 1/8" hole center drilled* in one end and 1/2" deep; end with hole faced off square & no edge chamfer.

Part B - 1.000 x 1" long with a 1/8" hole center drilled* completely thru; both ends faced off square & no chamfer.

Part C - 1/8" x approx 3-4" rod - fits exactly (sliding fit) in 1/8" holes in A & B. Drill rod maybe? Something stock, "off the shelf" for cheap cheap cost!

*Center drilled holes in both parts A & B should perfectly align when A & B placed end to end in V block.

Quote for one set (prototype) for approval - later I'd buy six sets (one each A, B, & C) at a time; possibly more later. Sorry, no drawing; ask if any ??

Tell ya what - forget part C - I will furnish C since I can buy drill rod for next to nothing. Just quote for A & B - 1 each and 6 each.

You may wnat to check here for the type of sliding fit you are looking for.
http://www.me.metu.edu.tr/me114/TOLERANCING.htm

For the 1/8" shaft you may want to use centerless ground shaft.
You can get it from MSC or McMaster Carr in different lengths and with known diameters and tolerances.

I suggest using drill rod or the centerless ground shaft for the 1.000 diameters also. I doubt you'll get the 'perfect' results using cheaper 1" diameter round stock. You can also use larger stock and turn the 1.000 diameter to size.

For the 1/8" diameter hole, you can try reaming...you might get luckey and have it turn on the 'perfect' center. But I'd not waste time trying and I'd bore the hole to size.

I'm not quoting this job, but if I were I'd get you clarify the sliding fit you want. Or, explain what you are trying to do with the pieces.
The term 'perfect' may keep many from quoting, but it's possible...expect to get bids that seem very high for what seems very simple.

pix

Yeah, not being familiar with machining and machining terms, tolerances, finishes, etc. probably best I just get somebody locally to help me cobble something up to test out my idea and only when I'm really ready, come back here if needed.

Luck me wish...did i right say that?