Oneway Talon Spigot Jaws Wobble

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Walldepartment
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Oneway Talon Spigot Jaws Wobble

Post by Walldepartment »

Material wobbles in my spigot jaws. At first, if I kept loosening and retightening the stock in the jaws, it would magically be fine and spin perfectly. Over time, it got worse. Now, 99% of the time, the stock wobbles off center. I can't drill a piece of delrin on center and it's really annoying. How to fix this?
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KurtHuhn
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Re: Oneway Talon Spigot Jaws Wobble

Post by KurtHuhn »

There's a couple things at play here.

The first is that you're using a 4-jaw chuck. While this can work, and does work in some cases, it's not the same as using a 3-jaw chuck. 4-jaw scroll chucks just don't center as well as 3-jaw chucks, and will always position the material slightly off-center.

Second, the spigot jaws are made of a pretty soft steel, and they will bend - making it difficult to get a good grip, let alone a precision grip, on rod stock. If even one of your jaws gets bent outward, your stock will wobble.

For a long time I used a oneway chuck with spigot jaws for rod stock work. I don't anymore, for both reasons above. I suspect that, if it used to hold securely, and now it doesn't, you've got a bent jaw or two.

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Walldepartment
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Re: Oneway Talon Spigot Jaws Wobble

Post by Walldepartment »

Well, that sucks. Thanks for the info.
scotties22
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Re: Oneway Talon Spigot Jaws Wobble

Post by scotties22 »

I had that problem with my 4 jaw chuck I use for stems..........two of my jaws were loose :lol: tightened em up and haven't had a problem since :wink:

I use this chuck exclusively for rodstock and always have, maybe that helps?
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kkendall
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Re: Oneway Talon Spigot Jaws Wobble

Post by kkendall »

You didn't mention the kind of lathe, I'm guessing a mini/midi wood lathe?

There is a thick, flat washer/spacer that goes over the spindle, behind the chuck. Not using that spacer can cause the condition you describe.
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