What chuck would you guys recommend for turning bowls 8" - 12" in diameter?
And the hex key system for tightening the jaws cannot be matched by geared chuck keys.
Odie, sometimes when gripping a roughed, dried bowl on the inside (in a spot quickly cut with the bowl gripped by the original tenon, then reversed) in expansion mode, so as to finish the outside profile, and maybe the foot too depending, the chuck is almost entirely inside the bowl, and the regular key has no straight shot for access.
When this happens with my hex keyed vicmarc I can just use a regular allen wrench to reach in there and snug it up.
With a geared key my sense is I would be unable to do that, though I've never used one so it's a guess on my part.
There's other ways to get it done, of course, but that's my strategy often and with bigger, deeper bowls I have to reach further into the bowl to find a spot where my jaws (usually step jaws for this) will get a grip, and by then most of the chuck body is pretty much inside the bowl.
Odie did you ever strip 1 of your keys? I never used a oneway chuck but I'm in the market for a big chuck and that is a factor I have stripped drill chuck keys in the past but I don't know how similar the key on a chuck is.
Odie did you ever strip 1 of your keys? I never used a oneway chuck but I'm in the market for a big chuck and that is a factor I have stripped drill chuck keys in the past but I don't know how similar the key on a chuck is.
Odie said;
"I wonder how common it is for the average turner to have a need for putting the chuck far enough into the bowl interior to prevent adjusting the jaws."
Odie, that made me chuckle, trying to figure out what an "average " turner might look like.
Maybe we're all average. Or maybe none of us are, who knows?
It's not that I need to do it that way, as I said there's other ways to go, but I choose that strategy for speed and convenience for production runs.
About thirty seconds or so to true the rim and turn the recess for the expanding jaws, gripping the tenon in compression mode with the closest diameter on the step jaws. Then reverse to grip the inside of the bowl so I can get at the outside profile. No tailstock involved, so access is unlimited, and I can turn the profile and then the foot to fit whichever compression step in the jaws seems best.
Sand and finish the profile and the foot, reverse one more time to finish the rim and inside and it's done. For production runs this works well for me, no changing chucks or jaws, and no tailstock to work around.
A 10-12 inch bowl goes from dry rough turned to finished in about 20 minutes, including sanding and an oil and beeswax finish.
On a good day.
Other days, ..... well, you know how it is.
Odie I like the hex key better for several reasons. The main one being if you lose it, misplace it, or forget to bring it with you when you travel, you can simply go to the hardware and buy another. It's just a 10mm allen. You can't do that with any of the geared chuck keys.
I've also seen geared chuck keys break a tooth and some of them are a little finicky to get onto the slot and engage a tooth. I've never had that problem with the hex key.
I use jumbo jaws or even homemade jaws on my chucks from time to time. The key that comes with the chuck is too short for these. There are two very quick and easy solutions for this. One is to buy a Ball end allen wrench. These can adjust the key at really odd angles which makes it really easy to reach in. the other method is to simply weld a short piece of 10mm allen to a longer rod with a T handle and make your own longer wrench, which is what I did.
That's why I like the Vicmarc chucks so much. That and they are excellent quality.
...... For gripping a tenon, the jaws have ribbed serrations for extra holding ability. It's normal for these serrations to crush the wood grain slightly, and this is all part of the intended procedure. If you really wanted to crank hard, I'm sure you could really crush the grain of the wood far more than is necessary for a good grip......
Awhile back I started buying bodies without jaws and went to dovetail jaws for this reason. No serrations. It makes it easier to re-chuck a piece. But the holding power is probably related more to the profile of the tenon matching the profile of the jaws and having a load bearing surface to ride flat against the jaw face probably than the serrations crushing the wood (and not bottoming out on the chuck body, bad, bad bad!) .
Why would it not become like a "chainsaw" thread?
Regarding re-chucking, I've had slightly better results by marking the workpieces to identify jaw numbers. It won't compensate for subsequent warping, but anything helps to preserve the original engagement. Ditto even for spur drives, to accommodate minute tolerances in manufacture of the tools.
Why would it not become like a "chainsaw" thread?
Regarding re-chucking, I've had slightly better results by marking the workpieces to identify jaw numbers. It won't compensate for subsequent warping, but anything helps to preserve the original engagement. Ditto even for spur drives, to accommodate minute tolerances in manufacture of the tools.
...
btw: What's a "chainsaw thread"?
ooc
Drivel in the form of "mine's better than yours." Or, more generally, I am the center of my universe, and ignore overlaps with other folks' universes. Seen in roadway traffic every day, sometimes twice on Sunday.![]()