I friend of mine has a knock of of my 1236 from Harbor freight. His head when tightened down, if you put wood in it the head and tighten the tail stock the head will lean back about 1/8 inch. I was glad I had my Jet 1236.
I went home and mine does the same thing only not quite as bad I took the head off and really couldn’t see any thing wrong with it
But as far as design I feel this is weak point .The head is held in two places buy two cast Iron u clamps with a rod running thur the head where the other clamp is installed.
It in turn pinches ( when tightened ) a round cast circle that is tapered on the bottom. The problem is in the front of the head that is not being support buy any clamp.
This allows it to bend backwards when you tight the wood with the tail stock. I ground the clams a little to on the top allowing them to move inward slightly and this helped some. But I was embarrassed when when my came over and saw I had the same problem that is cheapo had.
My question is what is the fix for this?
Replies
How much force are you applying with the tailstock?
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Men will never be free until the last king is strangled with the entrails of the last priest.
~ Denis Diderot
On his just the necessary amount to hold the stock in place.
I actually tool a crow bar and put it chuck and gently applied pressure. You could see a gap open up at the front of the head.
Was it ever a problem before you discovered it was there? If it worked to your satisfaction before why fix it now?
I guess it was a problem before. I would get some vibration on some pieces.Also the star bit or what ever you call it would strip the wood pretty easy. I like my machinery to be dead on, I do machine work as well. I asked this question so I might generate some easy fixes if it's common ,problem so I don't have work it out ( actually I have a fix in mine.) If it works so what with problem, it seems it's got to work better without it right? Why worry about it doesn't cut it with me :). I want it the it should be, not almost be, been that way all my life.
Okay, since you had issues that might be from the headstock I can see the desire to fix it. If there weren't, then I prescribe to the "If it ain't broke, don't fix it." club. Sometimes we expend much effort trying to get perfection were it isn't necessarily needed or practical. Sharpening for example. ;)
Are you removing the drive spur and setting it into the workpiece with a mallet or are you using just the pressure from the tailstock?
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Men will never be free until the last king is strangled with the entrails of the last priest.~ Denis Diderot
Yup I driver deep. I expect a spin every now then with bark. It just has a vibration, caused tool to catch sometimes and I never catch tools (Oh Bill you lair) sorry.Bill
I drive it home but, I don't quite understand what that has to do with the head tilting back. I should be able to really crank the tail stock and the Head should stay still.Thanks Bill
Why would you wish to do so? It should be just tight enough to be secure, more than that and you are putting unnecessary stress on the bearings.
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Men will never be free until the last king is strangled with the entrails of the last priest.~ Denis Diderot
I Think your misunderstood something. I pound the star drive with a hammer into the wood, but the tail stock I just snug up. I found the moving of the head not even using the tail stock I lifted up on the head shaft with a piece of wood and saw the head tilting back.. Anyway I fixed it by milling a slight amount off the two the hold down clamps allowing them to clamp the circle plate tighter. I did the same to my friends machine and alls well.Thanks for your input all of you.
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