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4th Jun 2019, 07:16 PM #1Intermediate Member
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Lathe Chucks Whats a good brand without breaking the bank??
I was wanting to get a 4 jaw self centering chuck and was wondering what suggestions for brand and quality. What are those Sanou ones like on Fleebay are they as crappy as the price suggests? Don't have heaps of dollars but don't want to waist what I do have either.
Any help would be appreciated.
Gaza
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4th Jun 2019, 08:41 PM #2Pink 10EE owner
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Before buying a 4 jaw self centering, ask yourself if you need one. You do not see them around much because of their very nature they are very poor work holders unless it is for some production work where the jaws are machined to hold the same part day after day.
Gold, the colour of choice for the discerning person.
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4th Jun 2019, 09:19 PM #3Intermediate Member
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I am restoring a pre 1880 Mortising machine that will require a fair few reproduction square head bolts made... after watching Keith Rucker’s video on the same it was obvious that a self centering chuck was going to make the chucking of square stock much more efficient.
Gaza
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4th Jun 2019, 10:01 PM #4Most Valued Member
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For this restoration have you any idea how concentric the head of your bolt needs to be to the thread.
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4th Jun 2019, 10:15 PM #5Most Valued Member
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What he said. It probably doesn't have to be that close (by machining stds)
If you set your square bar (is it bright or black?) up in your std 4 jaw as close as you need it to be, then mark 2 adjacent jaws, just loosen the same jaws every time to move your square bar out for the next bolt, I reckon with a bit of care it would be close enough.
peter
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4th Jun 2019, 11:37 PM #6Most Valued Member
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I second the previous opinions, I've used my centering 4 jaw once In a long ownership. Just use your regular 4 jaw and don't move two of the jaws.
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5th Jun 2019, 08:57 AM #7Pink 10EE owner
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But in answer to your question. I had a Sanou chuck I fitted to a Hercus 260. It seemed fine.
Gold, the colour of choice for the discerning person.
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5th Jun 2019, 10:14 AM #8Intermediate Member
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Thanks Everyone for your thoughts on the subject...It's very much appreciated... I will give the 4 jaw a go and see how it works out... it will save forking out cash for something that would get rarely used.
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5th Jun 2019, 02:38 PM #9Most Valued Member
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You could also make up a crude square "collet" to clamp in your 3-jaw.
Steve
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5th Jun 2019, 02:57 PM #10Most Valued Member
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5th Jun 2019, 04:52 PM #11Senior Member
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I suppose every ones needs are different. For small repeat work
I would be lost without my 100m self centring 4 jaw. The 10" is just to big.
4in Cushman 01.jpg
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5th Jun 2019, 06:19 PM #12Golden Member
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In the model engineering hobby, square stock is frequently held my making a cylindrical bush in the 3-jaw, ID the same as the square stock across the diagonal, OD a few mm larger (say 5 mm for ID 15 mm), then slit the bush lengthways (hacksaw OK).
To use, just put bush in 3-jaw with slit midway between jaws, slide stock in, draw down with the jaws.
Position a stock flat opposite the slit.
Got a few of these bushes made and stored with the lathe tooling.
John
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6th Jun 2019, 09:33 AM #13Intermediate Member
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Thanks John.... I wouldn't have thought that would hold..... a couple or Youtube videos later and I am sold on the Idea
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6th Jun 2019, 09:36 AM #14
What are the benefits of a SC 4 jaw chuck?
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6th Jun 2019, 05:14 PM #15Most Valued Member
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Good for holding square stock,octagonal or any divided by 4, if facing large diameter material it may provide more ridgidity to the work piece over a 3 jaw, it keeps manufacturers in a job.
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