paul
Member
Posts: 8
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Post by paul on Nov 30, 2006 22:08:39 GMT
Newbie Alert!
What is the best way to protect work from being marked by the jaws of the chuck?
I wanted to give my 4 jaw chuck it's first outing tonight but it came with hex socket bolts rather than having threaded studs so it's physically impossible to mount it! Is it ok for me to just bung in some studs?
I have a 'Clarke CL300' mini-lathe.
Thanks muchly...
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Post by baggo on Nov 30, 2006 22:23:55 GMT
Hi Paul,
Forgive me if this is a daft question but did you get the threaded backplate to go with the chuck i.e. the plate that screws onto the lathe spindle and the chuck then bolts to?
To prevent marking work held in the chuck put some brass shim or similar between the jaws and the work. At a pinch thick paper will do.
John
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paul
Member
Posts: 8
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Post by paul on Nov 30, 2006 22:33:54 GMT
Thanks John
Yes, the three jaw chuck was in situ when shipped. I undid the three nuts and took it off, opened the box containing the 4-jaw only to find that it has no studs/nuts it has 3 bolts instead! I guess I can just hack the heads off the bolts stick them in the chuck then find some nuts.
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Post by baggo on Dec 1, 2006 1:12:32 GMT
Hi Paul,
Sorry, I was under the impression that the chucks have a seperate backplate that screws onto the lathe spindle. My brother and I went over to Arc Euro today and he bought the equivalent to the CL300. Looking at the bearing conversion that they do for their version I see that the spindle actually has an integral flange on the end that the chuck bolts on to. I can see now why the chuck needs to have studs fitted and nuts to fasten it to the flange. As you suggest, you can just cut the heads off the hex bolts supplied and use those with matching nuts. Mind you, that may be easier said than done as the bolts may be hardened!
John
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paul
Member
Posts: 8
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Post by paul on Dec 1, 2006 7:50:00 GMT
Cheers John, it did occur to me that the bolts supplied might be a bit of a bu44er to cut, ah well!
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Post by ron on Dec 1, 2006 9:57:05 GMT
Paul
Both my chucks are held onto a flange on the mandrel with 3 allen screws from the back and the machine [Warco] came supplied with a modified allen key to change chucks, it's a clumsy system due to the tight clearance between the lathe gearbox and the chuck flange but it works well enough, before you go cutting anything check if you can bolt the chuck on from the back of the flange.
Ron
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paul
Member
Posts: 8
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Post by paul on Dec 1, 2006 10:41:25 GMT
Tried it Ron but there's no way to get the bolts through - they're probably inch and a half bolts with maybe ony 3/4" clearance.
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Post by ron on Dec 1, 2006 11:02:34 GMT
Paul
Looks like you'll need to cut them, at least that way you'll have a consistent chuck mounting system, if they're hard use an angle grinder with a cutting disc and tidy them up with a bench grinder.
Ron
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Post by baggo on Dec 1, 2006 11:10:28 GMT
Paul,
Arc Euro do a separate chuck backplate for their C3 mini lathe (which is made in the same factory as the Machine Mart CL300 and is basically the same lathe). I presume this goes between the lathe spindle fixing and the chuck so that other 3 and 4 jaw chucks can be fitted easily. Might be worth giving them a ring about it.
John
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Post by havoc on Dec 1, 2006 18:16:01 GMT
Are you sure you cannot pass the bolts through the plate on the spindle? On my lathe, there is a separate plate that can turn a bit with keyhole slots in it. So you can put on the head with the bolts in place, then turn the moveable plate so that the head is secure while you take the spanner to tighten it.
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paul
Member
Posts: 8
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Post by paul on Dec 1, 2006 20:00:48 GMT
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