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Thread: Cam lock chucks
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30th Apr 2007, 09:26 PM #1Diamond Member
- Join Date
- Sep 2006
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- Australind , WA
- Age
- 58
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- 1,277
Cam lock chucks
Hi Guys,
I had to fit my 4 Jaw chuck to my AL-335 lathe today and had a hell of a time getting the cam locks undone to get the 3 Jaw off. I had to use 2 ring spanners as extensions for the chuck key to get all 3 of them loose. Are they supposed to be that tight? I thought maybe H&F had done them up super tight to stop people nicking chucks in their showroom. Anyway, I just gently snugged up the cams up, when I fitted the 4 Jaw and it hasn't flung off yet, so I guess they are ok.
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1st May 2007, 01:36 AM #2Golden Member
- Join Date
- May 2003
- Location
- Perth WA
- Posts
- 526
Hi Steve,
They have a habit of suddenly letting go when you undo them so watch your knuckles. No mine are not put on as tight as that and I have never lost a chuck. Perhaps somebody put them on with a mallet.Cheers,
Rod
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1st May 2007, 09:34 PM #3Prairie Joints
- Join Date
- Mar 2007
- Location
- Millicent, S.A.
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- 65
- Posts
- 28
G'day Sterob.
The engineering company I worked for a few years back had cam lock chucks on their lathes. All Taiwanese 4' and 6' bed types. No problems with changing them, never had one come loose. I had a piece of tube which I used on the Chuck lock key for some "torque multiplication."
Rodm is right though,watch your fingers 'cause they do let go !. Make sure you use your bit of timber under the chuck, otherwise you can damage the bed. They were probably tight from the assembly grease and being new and all.
One thing I would do if you haven't already done it is centre punch a mark on the chuck and chuck mounting so that you can refit the 3 jaw chuck in the same orientation evertime.
My lathe at home is an old Brunswick which uses the traditional screw on type so I have no choice here. You have to make sure everything is clean before nipping that up.
Cheers............Barry.Quote "What one man can do another man can do" UnQuote: Anthony Hopkins in the movie "The Edge". "A problem is just a solution in disguise", author unknown.
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1st May 2007, 10:41 PM #4Diamond Member
- Join Date
- Sep 2006
- Location
- Australind , WA
- Age
- 58
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- 1,277
Ok, maybe it was just some ham fisted employee swung off the chuck key as it was certainly very tight. Makes me wonder how they did it...oh well...
I remembered to use a bit of wood to protect the bed, a that was one of the first things drummed into me when I first used a lathe.
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2nd May 2007, 03:10 PM #5Intermediate Member
- Join Date
- Mar 2005
- Location
- Jindabyne
- Age
- 74
- Posts
- 40
Camlock Chucks
Hello People,
At rhe risk of slightly hijacking the thread. I had a machinist mate round recently and we had a discussion around my AL330G while I showed him my new toy. The Lathe. Eventually I asked how to remove the chuck.
We loosened the thinges for want of a better word using the key but could not get the chuck to budge. There are allen screws in the Chuck also but he seemed sure they were not part of the equation.
Was he wrong and what else should we have done to sucessfully remove the chuck? I didn't need to remove it at the time but may want to in the future.
Help would be greatly appreciated.
Rod I really haven't done anything productive with the CNC Router but have watched your escapedes with awe.
CheersBrian
Creator of Fine Firewood
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2nd May 2007, 04:33 PM #6Golden Member
- Join Date
- May 2003
- Location
- Perth WA
- Posts
- 526
Hi Brian
The keys only turn roughly about 90 degrees to unlock but it can vary a little depending on how the studs are adjusted. They have a ball bearing stop in there so you can hear it click when you have it in the right position. You will see all this once you get it undone but have a look at the studs on your 4 jaw. I am fairly sure you undo them in a clockwise direction but if I am wrong can you correct me Steve or others.
You have either over turned the key and re-engaged the lock or the factory grease is holding it there so a gentle but sharp tap with a rubber mallet will release it - support the chuck with one hand and protect the ways of course. Not the ideal thing to do but it is the only way I know and it worked for me.
The CNC machine building has been fun and thanks for your help and encouragement when I started. The little mill I just finished is proving to be the best toy I have got. The rigidity of the mill has helped with accuracy and it is machining all the mounting for mates doing their builds. It is hard to digest that by doing a 30mm diam hole 14mm deep on screen that it actually will be the exact finished article. The bearing just pushes in with no play and somehow it doesn't seem right to be able to make the part so easily.
Good to hear you have got a new lathe - a nice choice too.
And you thought you were hijacking the thread.
Sorry Steve.Cheers,
Rod
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2nd May 2007, 11:47 PM #7'What the mind of man can conceive, the hand of a toolmaker can achieve.'
Owning a GPX250 and wanting a ZX10 is the single worst experience possible. -Aside from riding a BMW, I guess.
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3rd May 2007, 02:37 PM #8Intermediate Member
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- Mar 2005
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- Jindabyne
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- 74
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- 40
Camlock Chuck Removal.
Thanks Article99 and Rod.
I'm in Melbourne at the moment so I can't try it but I will.
CheersBrian
Creator of Fine Firewood
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3rd May 2007, 11:21 PM #9