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Coring a bowl with the Kel McNaughton coring tool (Read 3,925 times)
 
Ron Sardo
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Coring a bowl with the Kel McNaughton coring tool
Jul 12th, 2009 at 6:17pm
 
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Re: Coring a bowl with the Kel McNaughton coring tool
Reply #1 - Jul 13th, 2009 at 1:19am
 
Great video, Ron. Leave it to Bill to stall a 3hp Robust. One-handed.  Smiley
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Re: Coring a bowl with the Kel McNaughton coring tool
Reply #2 - Jul 26th, 2009 at 7:28am
 
Wow, I've never packed heat while I'm turning! Wink  That would be good for keeping people from hassling you when you're busy.
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Ron Sardo
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Re: Coring a bowl with the Kel McNaughton coring tool
Reply #3 - Jul 26th, 2009 at 9:22am
 
Now you know why the wood is so co-operative. Smiley

Bill is a NRA Certified Instructor.
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Re: Coring a bowl with the Kel McNaughton coring tool
Reply #4 - Jul 26th, 2009 at 7:25pm
 
Heck big as he is he don't need no gun  smiley=shake head.gif smiley=shake head.gif
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Re: Coring a bowl with the Kel McNaughton coring tool
Reply #5 - Jul 27th, 2009 at 1:01am
 
Got to use my McNaughton this weekend.  Got three bowls from one blank.  In fact, I used the maple I got from Ron in the last swap.  How much fun.  Felt like I learned a lot this time and will be using it again.

Ron, is it normal for the smallest blank to be hard to get started?
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Re: Coring a bowl with the Kel McNaughton coring tool
Reply #6 - Jul 27th, 2009 at 9:26am
 
Rev. Doug Miller wrote on Jul 27th, 2009 at 1:01am:
Ron, is it normal for the smallest blank to be hard to get started?


I typically don't bother with cores that are smaller that 6"-7".
To answer your question, it shouldn't be any harder then the bigger ones
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Re: Coring a bowl with the Kel McNaughton coring tool
Reply #7 - Jul 27th, 2009 at 10:46pm
 
That is probably the issue.  It is only 3 1/2" in diameter.  It was left with the original screw holes from the face plate at the very beginning, but at least I got it out and turned.
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Re: Coring a bowl with the Kel McNaughton coring tool
Reply #8 - Aug 10th, 2009 at 4:19pm
 
Good video and very timely for me!
I want/need more information on coring systems, but short of "brand x at  $$$$" it seems to be in limited supply (information welcome).
I see the gist of coring but, I have questions about chucking up the cored sections when they (I think) come out relatively thin.
I'm missing something - anyone care to fill me in?
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Re: Coring a bowl with the Kel McNaughton coring tool
Reply #9 - Aug 10th, 2009 at 5:47pm
 
Andrew, I think I have this chucking thing worked out at last.

1. Mount blank with a faceplate and cut a recess in the centre before making the first bowl saver cut.

2. Make bowl saver cut and remove cut section.  Remove big bowl blank with faceplate from the lathe and mount the cored section in a chuck using the recess you cut earlier and cut a tenon or recess on the tailstock side.  Turn the blank around on the chuck and cut a new bowl.

Repeat Step 2 if you can, using the original recess, to get another bowl.

If I'm wrong I'll soon know Grin
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« Last Edit: Aug 10th, 2009 at 5:50pm by Brendan McAreavy »  

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Re: Coring a bowl with the Kel McNaughton coring tool
Reply #10 - Aug 10th, 2009 at 8:22pm
 
What does he use that "tool" over his right hip pocket for -- drilling holes. Grin
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Re: Coring a bowl with the Kel McNaughton coring tool
Reply #11 - Aug 10th, 2009 at 10:48pm
 
Hi Andrew,

I have the Oneway system. I always use a Oneway Stronghold chuck with a tenon for mounting. I also always take the smallest core first, them move inward to take the next bigger core and so on. I do this because it lets me do all the coring with just one mounting. So far so good for me Smiley

Best wishes,

Dave
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Re: Coring a bowl with the Kel McNaughton coring tool
Reply #12 - Aug 11th, 2009 at 4:36am
 
Dolan Brown wrote on Aug 10th, 2009 at 8:22pm:
What does he use that "tool" over his right hip pocket for -- drilling holes. Grin


Dale,
It the wood doesn't comply to his instructions that is for intimidation factor.  Grin
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Re: Coring a bowl with the Kel McNaughton coring tool
Reply #13 - Aug 14th, 2009 at 11:27pm
 
Brendan McAreavy wrote on Aug 10th, 2009 at 5:47pm:
Andrew, I think I have this chucking thing worked out at last.

1. Mount blank with a faceplate and cut a recess in the centre before making the first bowl saver cut.

2. Make bowl saver cut and remove cut section.  Remove big bowl blank with faceplate from the lathe and mount the cored section in a chuck using the recess you cut earlier and cut a tenon or recess on the tailstock side.  Turn the blank around on the chuck and cut a new bowl.

Repeat Step 2 if you can, using the original recess, to get another bowl.

If I'm wrong I'll soon know Grin


There are a few different ways. The way you described has fewer steps, and Dave's has even fewer yet, but I prefer tenons to recesses, so here's how I do it most of the time. I don't remember if I saw this on Reed's or Mike's video...

1. Form the outside of the mother bowl, and put a good tenon on it.

2. Reverse the blank and true up the face.

3. Cut the biggest core out of the mother blank. This leaves the mother bowl on the lathe. (I think it was Reed who suggests doing it this way...getting the big bowl first, since it's the money bowl, and you're less likely to mess it up that way.)

4. Take the core (now blank #2) and reverse it, putting the flat end into the mother bowl (still in the chuck), and hold it in place with the tailstock. Just a big jam chuck.

5. Turn a tenon on the bottom of the #2 blank, then set that blank aside.

6. Finish rough-turning the mother bowl (or finish turn it, if you're doing it all in one sitting). Remove it from the chuck when done.

7. Mount blank #2 and repeat the process...core, reverse the core to cut new tenon on it, finish inside of mounted bowl, rinse and repeat until there's no more wood left.  Wink

Making the tenon on each new core is real easy after you've done it once, and you don't really lose much bowl thickness doing it that way as long as you don't try to make long tenons. I've gone as short as 1/8" or so for small bowls (usually closer to 3/16"), and not had any problems with them flying out of the chuck. (I'm also not spinning it at 9 bazillion RPM, and catches are pretty rare for me these days. Too much speed or a bad catch would likely pop it out of the chuck.)
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« Last Edit: Aug 14th, 2009 at 11:28pm by Vaughn McMillan »  
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Re: Coring a bowl with the Kel McNaughton coring tool
Reply #14 - Aug 15th, 2009 at 10:26am
 
Vaughn, you've gone and done it now. Undecided  You should not have said anything about not getting many catches these days.  Now you can bank on a catastrophic catch.  Sorry to hear about your bad news. Cry
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