Collets also come in hex and square.
On Thu, 6 Dec 2012, gerry waclawiak wrote:
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 the average hobbyist however I think a 4 jaw independent takes a lot of bearing for versatility in the range of sizes and sections that can be gripped and you can also turn eccentrically. Not as quick as collets but just as accurate and pretty fast with proper technique.
Gerry W
Leeds UK
To: 7x12minilathe@...
From: vev@...
Date: Thu, 6 Dec 2012 14:10:27 -0500
Subject: RE: [7x12minilathe] Re: Question about turning down and runout
On Thu, 6 Dec 2012, gerry waclawiak wrote:
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 machining operations without re-chucking then your parts will be pretty much spot-on. This is often possible with a little thought about the sequence you use for the necessary operations
If you absolutely must re-chuck then mark a jaw and the part with a felt tip pen or similar and re-chuck matching the marks - that should reduce your run-out considerably.
If you can get 0.005" with the stock 3 jaw with re-chucking that is pretty respectable, if you want better you need to invest in a 4 jaw independent to go with your dial indicator
Or consider using collets.
Vince.
--
Michigan VHF Corp.
The Foggy Mist Emporium
Vince.
--
Michigan VHF Corp.
The Foggy Mist Emporium
