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Thread: Extra Large Handwheel
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6th May 2007, 11:35 AM #1
Extra Large Handwheel
I had a 19" Sweetgum Bowl to finish the bottom on. The other Longworth Chuck I made was for the 16" side of the lathe.
I made this one from Baltic Birch 1/2" Plywood. It works like a charm on the outboard.
Pic 1 - Smallest bowl it will hold is 120mm dia.
Pic 2 - Largest bowl it will hold is 520mm dia.
Pic 3 - I put a faceplate on this one. I don't have an extra Spindle Adapter for the outboard spindle, and I'm too lazy to change it , so I used a 100mm faceplate that came with my lathe.
Pic 4 - I also made a small holder to mount on the end of my lathe, to save a few steps, and falling tools (kept rolling off the bed). Used a knob on the bottom, and it's pretty fast and easy to set up and tear down. Probably won't mount it when I have the tailstock on... just did this makin' it up.Al
Some minds are like concrete thoroughly mixed up and permanently set.
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6th May 2007, 12:41 PM #2
whoosh, whoosh?
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6th May 2007, 01:58 PM #3
Now that's what I call BIG. I'm very suprised that you don't have flex problems towards the rim, given how small the faceplate is relative to the chuck diameter.
What bolts and router bit combination did you use? I made a small one for my jet mini, and it didn't work because the bolts were too sloppy in the slots. Yet the next size up bolts, were too large. I just can't seem to find a suitable conbination.Chris
========================================
Life isn't always fair
....................but it's better than the alternative.
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6th May 2007, 04:13 PM #4
Impressive "handwheel!" (But wouldn't it have been easier to just replace the starting cap if you need to rollstart it? )
A while back I spent a few minutes and quickly knocked together something similar, but instead of fastening it upright to the bed like yours I made a "tab" on the back side of the top so I could "hook" it into the ways to sit flat. I also offset the tab to the left, so the tray could hang past the end of the lathe bed. From the pix you can see it's not the strongest assembly in the world, nor joinery to be proud of (just a quick tack-attack with a bradder ) but it's more than strong enough for a few tools.
'Tis easily moved around, but I think that if I make another I'll leave the backing plate open like yours... it's a bit of a sawdust collector as it is.
- Andy Mc
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6th May 2007, 05:15 PM #5
Al,
Nice one! Thats a fair decent size for a Longworth chuck.
Have yet to get around making mine, no doubt as the need dictates....sigh
Have stuffed around with several ideas for a tool holder. Another nuisance/annoyance driven project.Inspiration exists, but it has to find you working. — Pablo Picasso
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6th May 2007, 06:37 PM #6
don't worry Hughie, just remember things are darkest before they turn completely black and you will be...
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6th May 2007, 08:54 PM #7
G'Day Al
Great longworth, bet it keeps you cool in summer LOL
Cheers
Bernie
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7th May 2007, 05:30 AM #8
Chris: What bolts and router bit combination did you use?
I used 1/4" bolts, 3" long. I didn't use a router, I used a compass to draw the double arcs 1/4" apart, and sawed them out very carefully with a small saber saw. Then I filed the arcs fairly smooth.
The buttons are 1/4" i.d. tubing, slipped into 1/2" i.d. tubing. The 1/4" inside is 1/8" shorter than the outside, allowing the head of the bolt to be covered. I put a washer on the bottom of the button, that isn't bigger than the outside tubing (this makes the tubing swell outward when you tighten the wingnut. Then on the outside, I placed a fender washer and a wing nut. Wax the inside of the disks with paraffin, it's slicker than snot. And don't tighten the hub bolt too tight. If it catches when I try to open it up or close it down, I just slap it, and it frees it up... but it don't catch much.
Skew: a "tab" on the back side of the top so I could "hook" it into the ways to sit flat.
The tab is a good idea, Skew... may adapt mine to do the same. You wouldn't believe the first way I had mine set up...
Skew: I'm very suprised that you don't have flex problems towards the rim
Didn't have any flex that I noticed, but the bottoms of the bowls are always gonna be closer to the size of the faceplate... still, the wood is held by the buttons out at the edge... ????? Hmmmm.. I'll have to watch that next big bowl.
Hughie, when I come across a nuisance need, if I can take the time, I just stop what I'm doing and try to solve the problem... (that's why I'm so darn slow.)
Hmmm... wonder if blades added to the longworth would keep the sanding dust out of me eyes????Al
Some minds are like concrete thoroughly mixed up and permanently set.
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7th May 2007, 11:53 PM #9
After getting a couple of knuckles bumped by some nasty types of bolt heads on my Longworths, I changed to this arrangement with the 'connector' bolts as they're called here. Very low profile with no sharp edges to massage my knuckles, broad surface area so there's no need for a washer which also means the bolt and rubber 'stick' better so you don't need to hold them while you tighten/loosen the wing nuts - very handy when you're gripping from the inside of a piece. The feet are just standard rubber type feet you get from any hardware shop.
Edit - sorry about the dust and cobwebs - didn't notice them before!!!Last edited by TTIT; 7th May 2007 at 11:55 PM. Reason: had closer look at pics
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8th May 2007, 08:33 AM #10
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8th May 2007, 08:40 AM #11
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11th May 2007, 12:44 AM #12
OGYT
Congratulation and quite interesting.!
May I suggest you do a second disk but this time the way for your nuts should be just straight.
You put this disk behind yours and the two disks should rotate around the same axel.
What would be the advantage, you would say?
You just transformed yours in a self centering jig which speeds up the process of mounting your turnings on it.Last edited by La truciolara; 11th May 2007 at 12:45 AM. Reason: office mess
http://www.la-truciolara.com/
La Truciolara is the workshop where I do my shavings.
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11th May 2007, 08:56 AM #13
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11th May 2007, 09:22 AM #14
Impressive.... and so it the fridge... I wish I had a drink fridge like that in the shed.
Cliff.
If you find a post of mine that is missing a pic that you'd like to see, let me know & I'll see if I can find a copy.
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11th May 2007, 09:50 AM #15
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