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Amazing, isn't it? OK, here's what went on: 1. Your chuck is running true, but that's the chuck body. Are the jaws holing the 6" long piece of 1/2" stock truly centered? Possibly, but not probably. 2.

Collets also come in hex and square.

Yes, they make hex collets. Vince. -- Michigan VHF Corp. http://www.nobucks.net/ http://www.CDupe.com/ http://www.foggymist.com The Foggy Mist Emporium

Collets are another possibility if you only want to turn cylindrical stock over a relatively small range of diameters ,they are very quick and accurate fo repeat work and small scale production. For

So you guys are saying that I'm pretty much within the tolerances of the machine? What I'm gunna have to do is re-run this experiment, but keep careful notes and post them here to get thoughts on if

Or consider using collets. Vince. -- Michigan VHF Corp. http://www.nobucks.net/ http://www.CDupe.com/ http://www.foggymist.com The Foggy Mist Emporium

Congrats Mike B you have just discovered the problem with most 3 jaw chucks, that of repeatability when re-chucking. There are a couple of things that you can do to minimise. If you can arrange all

Like John L I don't throw much either. The old plastic gears from my Sieg mini-mill (same basic bits as the mini-lathe) gives a module of about 2.2 also so I'd go for Module 2.25, the closest (they

Is the part spec'ed for use in one of the space telescopes? If not, accept a level of precision that will do the intended job, and move on. bert

I'm sorry I said they were Mod 1.5. But I think that's what John L told me some months back :) Andy

In annother forum, it was suggested the bit in question could be an ingraving bit for a pantograph, what do ya'll think? I'd think it would be too fragile for that. Chuck

you're using a scroll chuck and the first time you put it in you got lucky. -- Jerry Durand, Durand Interstellar, Inc. www.interstellar.com tel: +1 408 356-3886, USA toll free: 1 866 356-3886 Skype:

Ok, so here's an interesting 'something' that I'd like thoughts on... First of all, I went through and ensured that my lathe is spot on with alignment, shaft not bent, chuck is spinning true (well,

I stand corrected. Module = PCD (Metric) / # teeth? Managed to dig out my old broken plastic gears (never throw anything away) and? measured PDM (Pitch Circle Diameter). of both 21 tooth = 45.5 mm

Ralph, I used your Version 2, 1A style, more or less. Thank you much for sharing your plans, I’ve either built several or at least used some of the ideas. Great job!! <<Jim>> Sent: Thursday,

I made mine a wheel with removable crank, never considered only making one or the other. For anyone who hasn't seen it: http://interstellar.com/temp/Lathe/Hand_Wheel/ Made almost entirely on the

Gadgetbuilder has a nice wheel for turning the lathe be hand, see www.gadgetbuilder.com. Mike

You can find 3 different sets of Hand Crank Plans here: http://www.toolsandmods.com/library/ralph-patterson HTH

It might be an idea to make it as a wheel rather than a crank, Charlie. I have a crank, and unplug the lathe before using it, as a reminder to remove the crank before starting the motor later on. If I

I made 2, for 2 different 7X lathes, it was very easy. Used a length of 1/2” water pipe for the main part, turned down the one end for a couple of inches or so to be maybe .002” smaller than the