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24th November 2013, 09:39 PM #1
6ft deep hollowing bar demo at the Gold Coast Woodturners Club open day.
I have attempted to get a WIP photo story of this deep hollowing tool being used to turn a deep hollow vase using green/wet Jacaranda.
During the process, there were at least 3 of us working on this piece in shifts.
First up, the log is mounted between centres & roughed out to round & then the end is cleaned up square for mounting on a large faceplate with good long roof screws.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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24th November 2013, 09:46 PM #2
Next, the outside & the top are roughed out & a hole is drilled down the centre with a forstner bit on an extension bar.
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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24th November 2013, 09:51 PM #3
Now the piece is transferred to the long bed lathe that has the deep hollowing tool set up on it.
The tip gets a quick touch up on the grinder & is set at the right angle & then work begins on the hollowing process.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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24th November 2013, 09:56 PM #4
Notice the little bulb mounted beside the tip so the turner can see what is going on.
The lathe has to be stopped on a regular basis to blow out the shavings & check the progress.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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24th November 2013, 10:03 PM #5
If you look back up at the middle pic in post 2, you will see that has turned a foot/spigot/dovetail on the base of the rough shape to allow it to be remounted in a large chuck for finishing after it has had time to dry.
In the first pic below, the 'team' are 'parting off' a piece that was turned earlier in the day with a saw.
The 2nd pic is that piece sitting in a corner waiting to dry.
The 3rd pic is of one that had been roughed out ahead of time & it had been cleaned up & sanded the day before.
You can see the 'refinement' that has gone into the shape of the pieces.... had a bit to do with that.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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24th November 2013, 10:10 PM #6
OK, now I am out of photos but you should all be able to see how this is done.
A big thank you to the Gold Coast Woodturners Club & , I enjoyed myself.
Now, before anybody asks, the deep hollowing tool used in this demo is not commercially available although the tip used is.
If you want one like it, you have to build it yourself.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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24th November 2013, 10:16 PM #7
Great work on the pics Cliff I reckon that hollowing rig is a slight case of overkill for the size of the forms but you work with what you've got I suppose
What type of lamp is it?? - often thought it would be nice to have some light while I'm hollowing rather than just checking with the pen-torch after each clean out
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24th November 2013, 10:19 PM #8
It is a small 12V bulb with 2 prongs on it stuck into a 2 pin socket held in place with a handful of cable ties.
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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24th November 2013, 10:25 PM #9
Pretty neat tool. I like the parallel bars to support the rear, too.
I'd love to see it pushed to the limit - a 6 foot vase.
Thanks for posting the pics, Cliff.... Steve
-- Monkey see, monkey do --
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25th November 2013, 05:19 AM #10Dragonfly
No-one suspects the dragonfly!
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25th November 2013, 08:13 AM #11
I didn't make this set up, I was visiting & I had the camera.
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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25th November 2013, 09:16 AM #12
Cliff TY for the WiP some dimensions would be nice of the vessel Pls.
Time to upgrade the camera to one which also does Video
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25th November 2013, 02:50 PM #13
That one will do video, but even just with stills alone there is 203Mb.
You'll have to wait for the man who owns the gear to check in on this thread to get dimensions... I was just a visitor on the day who happened to have a camera.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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25th November 2013, 04:11 PM #14
Isn't this the same or similar setup that Brian McEnvoy of Canada designed??
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25th November 2013, 08:59 PM #15Member
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The hollowing bar is along the same lines of Brian McEvoys. I bought the plans a couple of years ago and used these to build the system. Along the way we made a few changes / improvements. The tips and tool holders were purchased from Brian McEvoy as they are not easily manufactured. The light is a 12v light that is run at 24v - it does blow bulbs occasionally
I'll measure the forms and put down the exact dimensions - I would guess the finished form is approximately 400mm tall. The bar will hollow a lot longer but I need to make up a steady system first.
I enjoyed the day immensely and will post WIP's once I get a suitable steady system built with larger pieces.
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