Robust will also make you one special order, ask for offset tool rest, I turn big bowls with mine up to 24 inches in diameter. He will quote a price, it was priced right to. I am very happy with mine.
Robust will also make you one special order, ask for offset tool rest, I turn big bowls with mine up to 24 inches in diameter. He will quote a price, it was priced right to. I am very happy with mine.
Chris,
The design of the J-bar I made is a Chris Ramsey inspired design. Chris is the person that pointed out the need for the stop at the end.
By 'Captured System' I am referring something along the lines of a Jameson, Sinner, or Elbow type system. Something that prevents the handle end of the tool from being lifted by the downward force of the cutting action.
I have hollowed end grain vessels up to 20" deep with hand held tooling using a hook tool. But, the overall length of the tool was nearly six feet and the bar was 1-3/8" diameter. Even with that much length there was a lot of abuse delivered to my shoulder. Been there, done that, will use a Steve Sinner type system next time.
Back to the subject of deep bowls; A 10" deep bowl with average proportions would be about 20" to 30" in diameter. Those proportions would allow the use of long J-bar rests and long handled bottom grind gouges. But the chance of a mishap that deep into a bowl makes their use at least borderline unsafe. A stout captured system reduces the chance of a mishap and injury. The largest bowls I have ever turned were in the 18" to 20" diameter range about 6" deep.
Its 2x2x28. Mild steel. The post is 1.5" with gussets for stability. Its pretty solid. And heavy, ~ 30 lbs.
The holes are for pins, similar to metal spinning. You can see one at the right
Once I'm far enough inside a bowl / hollow form, I don't want my hand in there. And at 8+" over the tool rest, your hand has very little ability to control the tip accurately.
So pegs go in the holes and I work off the peg, in increments. With a long handle (i.e 48" pipe), I get extremely precise control over the tip. The pegs are NOT for leverage.
My last couple of pieces were 32" platters with lots of voids. By hand, there's no way to keep the chisel tip steady.
Last edited by Olaf Vogel; 09-24-2017 at 9:52 AM.
Do you have his contact info? I would like to order a couple also. Thanks<lynn
Lynn, I'm glad to help!
zepeda.thomas@gmail.com
The problem with very large pieces of wood is that you can’t rotate it fast or it will fly apart, I don’t remember the exact speeds used, started with 33 RPM and maybe got up to 200 rpm as the fastest speed, which would be more than 50 MPH on the outside surface, too fast for anything as weak as this really, so maybe it was 150 RPM.
Have fun and take care
It is a 15 inch overall tool rest, the post is set at 6 inch, leaving 9 inches to go into the bowl, not 7.5 inches. Has min vibration, and stays away from my banjo. I have an American Beauty. I ready love this tool rest, use it all the time. I have one on both lathes.
I just wanted to let you guys know that I took action on this. I replaced the stock banjo on my 3520b with a Oneway banjo, bought a Oneway 11-1/2" curved interior tool rest, and Tom Zepeda's 2 largest offset tool rests. I'll let you guys know what I think of Tom's tool rests.
Roger,
I just want to thank you for mentioning Tom's offset tool rests to me. I ordered the two that have the furthest reach. One has a 6-inch rest, the other has an 8-inch rest. My thought was that I want the furthest reaching one for sure, as it will stretch my horizons and offer possibilities that the others wouldn't. Still, there will probably be times when the 8-inch rest is too wide to fit into the space that I want it to, so I'd better get the long reaching one with the 6" rest as well. I figured the tool rests I already have work just fine for anything shallower than as far as those two extend.
Last edited by Chris Gunsolley; 09-28-2017 at 9:37 PM.
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