Quick Change Toolposts

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Quick Change Toolposts

This topic has 9 replies, 5 voices, and was last updated 12 October 2009 at 12:40 by wheeltapper.

Viewing 10 posts - 1 through 10 (of 10 total)

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11 October 2009 at 14:08 #44108
Oddlegs
Participant
@oddlegs
Hi, I have a question about using indexable lathe tools in a QCT on a Myford lathe.

The spec for a standard toolholder shows a thickness of 7mm for the lower clamping surface. With a 3/8 sq shank the distance between the topslide and the tip ot the tool will be 16.5mm and this will increase to 17mm with a 10mm sq shank.

On my lathe the top slide to centre line distace is 16.25mm so does this mean it’s not worth buying a QCT or am I missing something.
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11 October 2009 at 14:08 #16502
Oddlegs
Participant
@oddlegs
11 October 2009 at 14:22 #44110
Rob Manley
Participant
@robmanley79788
oops, posting mistake

Edited By Rob Manley on 11/10/2009 14:27:57
11 October 2009 at 14:26 #44111
Rob Manley
Participant
@robmanley79788
Haha, i just re-read your post and edited to suit.

The shanks are tough but not hardened steel so aslong as you dont mind milling a 1/16th off the bottoms you will be fine. After building up a set from shows and exhibitions of 11+ holders i can say that they are all full of tools ready to use – saves ages in setting tools up.

Edited By Rob Manley on 11/10/2009 14:28:14
11 October 2009 at 14:39 #44112
Oddlegs
Participant
@oddlegs
Thanks Rob, I shall now order one.

Best wishes, John
11 October 2009 at 16:40 #44113
chris stephens
Participant
@chrisstephens63393
Hi Nemesis,

A note of warning, you may think three or four holders will be enough, don’t be fooled. I counted mine up and I have fifteen and still not enough. What is the point of having to change tools over, the QC holder should allow you to have ALL your tools ready for use. (All right I know we are living in the real world, but we can dream can’t we?)

chris stephens
11 October 2009 at 18:36 #44114
wheeltapper
Participant
@wheeltapper
Hi

I know I haven’t had my little Comet lathe for long but I’ve already got 12 and I got some bar last week to make some more.

you will find the main problem is finding somewhere to put them .

cheers

Roy
11 October 2009 at 18:57 #44115
David Clark 13
Participant
@davidclark13
Hi There

Although many quick change holders are useful, if you make all your brass cutting tools out of the same size tool steel, you can change them over without losing the height setting.

regards David
12 October 2009 at 11:05 #44120
chris stephens
Participant
@chrisstephens63393
Hi There Mr. Editor, Sir,

You bother with special tools for Brass? How strange.

chris stephens
12 October 2009 at 12:40 #44124
wheeltapper
Participant
@wheeltapper
It must be nice to be able to afford the dam’ stuff anyway, every time I turn any brass I look at the swarf and cry.

I could start a foundry I suppose……………………

cheers

the miserly side of Roy
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