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Bowl Coring #1: What a waste of Perfectly Good Wood

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Blog entry by Mark Wilson posted 08-24-2015 08:06 PM 1249 reads 0 times favorited 18 comments Add to Favorites Watch
no previous part Part 1 of Bowl Coring series no next part

...and, what a thing to get distracted by. I rough turned a Black Walnut bowl blank (store-bought), back in April and got it out of its box of shavings yesterday to continue. The outside was shaped and it was still solid, though not round. It was, and is, to be a Lidded Box. So, yesterday, I made it round again, cut the lid off, and turned the inside. All the while, I’m thinking, what a freaking waste of perfectly good wood. It was just a six-inch blank, but, still. A bowl-coring system is called for. Here’s the situation: My lathe is a Shopsmith Mk5, of 1956 vintage. I’m well aware of the popular coring systems, and know how they work. Two posts, one serving as the pivot; the other as the thingy on which the curved blade rests/slides – the blade guide, I presume? I’ve looked all over the internetwebinformationsuperhighway for something that’ll mount to my lathe. I got nothing. Help me?

-- Mark



18 comments so far

View JoeinGa's profile

JoeinGa

7481 posts in 1470 days


#1 posted 08-24-2015 08:20 PM

You could possibly do it like a bandsaw box. Cut an inch off the bottom of the blank, then cut the core from the body with some sort of hole saw. Then glue the bottom back on and turn the piece. You’d get 2 bowls from one blank.

-- Perform A Random Act Of Kindness Today ... Pay It Forward

View Grumpymike's profile

Grumpymike

1917 posts in 1778 days


#2 posted 08-24-2015 10:26 PM

Joe I think you’ve got an idea there … going to try it …
I’ve not heard of the coring tool till BobWemm posted it today with his Granny Smith bowls.
Yeah, I live in a cave.

-- Grumpy old guy, and lookin' good Doin' it. ... Surprise Az.

View Mark Wilson's profile

Mark Wilson

1751 posts in 526 days


#3 posted 08-24-2015 10:31 PM

Yeah, it’s Bob’s fault I got on the topic today.

-- Mark

View Grumpy's profile

Grumpy

21563 posts in 3314 days


#4 posted 08-25-2015 01:34 AM

Not sure what you mean Mark. Further detail might help.

-- Grumpy - "Always look on the bright side of life"- Monty Python

View BobWemm's profile

BobWemm

1807 posts in 1389 days


#5 posted 08-25-2015 01:35 AM

Hey Mark,
If you google “WOODCUT BOWL SAVER” you should find the tool that I use. There is a US Coring system as well but I cannot remember what it is called, sorry.
These tools are very useful especially when you have an EXPENSIVE Blank that you don’t want to turn into shavings.
Hope this helps.
Lucky I have broad shoulders. LOL

Bob.

-- Bob, Western Australia, The Sun came up this morning, what a great start to the day. Now it's up to me to make it even better. I've cut this piece of wood 4 times and it's still too damn short.

View Mark Wilson's profile

Mark Wilson

1751 posts in 526 days


#6 posted 08-25-2015 08:07 AM

Yeah, Bob. The Woodcut is one I’m familiar with. The problem with it, as with the others I’ve found is that they’re not designed for use with a lathe that doesn’t have a flat bed. Mine is a Shopsmith, which has a tubular bed. Without some extensive modifications, I don’t see how one of those would work. Otherwise, I’d be all over it. I think I’ll PM Shipwright Paul. He uses the same machine.

-- Mark

View Bob Collins's profile

Bob Collins

2318 posts in 3146 days


#7 posted 08-25-2015 10:52 AM

Some systems on the net are Oneway and McNaughton but I don’t know if they will work on your machine, worth a look Mark.

-- Bob C, Australia. I love sharing as long as it is not my tools

View BobWemm's profile

BobWemm

1807 posts in 1389 days


#8 posted 08-25-2015 10:52 AM

Mark, the Woodcut fits into your existing Banjo (the thing that holds your Toolrest) and is also stabilised in the Tailstock.
I assume that your lathe has a banjo to hold your tool rest.??

Bob.

-- Bob, Western Australia, The Sun came up this morning, what a great start to the day. Now it's up to me to make it even better. I've cut this piece of wood 4 times and it's still too damn short.

View stefang's profile

stefang

15512 posts in 2797 days


#9 posted 08-25-2015 12:49 PM

The problem with coring is that you are restricted as to shape. It’s great for making wooden bowls, but not much more I think. Of course the cored out pieces can be used differently but you still wind up with one bowl whether you want it or not. Just my take, maybe others will be better informed.

-- Mike, an American living in Norway.

View Wildwood's profile

Wildwood

1882 posts in 1597 days


#10 posted 08-25-2015 02:39 PM

Think the Wood Cut & McNauhton Mark 8 Micro center sarvers might work on your lathe. More worried about horse power of your lathe, expense, learning curve. Know lot of people have used bowl savers on their Nova 3000 lathes.

Check out specs at;
http://www.packardwoodworks.com
http://www.woodturnerscatalog.com

Unless have a ready market for your bowls bowl savers pretty expensive gear.

-- Bill

View lew's profile

lew

11339 posts in 3218 days


#11 posted 08-25-2015 04:48 PM

There was a product called the “Bowl Saw”

http://lumberjocks.com/reviews/550#comments

I don’t think they are still selling this product but if you Google “Steussy Creations” you might get contact information.

That said, from the link to the LJ review, it is an easy thing to make. Just a steel rod with a modified saws-all blade brazed to the end and a handle. Here’s a link to a video on You Tube— https://youtu.be/OYwmZ4bR21o

-- Lew- Time traveler. Purveyor of the Universe's finest custom rolling pins.

View Mark Wilson's profile

Mark Wilson

1751 posts in 526 days


#12 posted 08-25-2015 08:34 PM

No banjo, Bob. The tool rest posts are positioned outside the tubes. I’ve thought about trying to design a platform that would give me an axial post. Then, any coring system would work.
Thanks for the links, Bill. I’ve BMd both of them.
Lew, that Bowl Saw is really something. When I first started thinking about bowl coring, I was ignorant of the gadgets that were available (this was a couple years ago). I didn’t imagine that any such thing existed – thought I was having an inventive moment. The Bowl Saw was what I imagined. Blew off the thought because I thought it unfeasible. Evidently, it’s feasible. Question: how does one bend a Sawsall blade without snapping it?

-- Mark

View Mark Wilson's profile

Mark Wilson

1751 posts in 526 days


#13 posted 08-25-2015 08:50 PM

Bob, look at what I just found. I had no idea. SS doesn’t advertise this. I found it through the SS Forum (thanks to Paul Shipwright).

!!!, indeed.

-- Mark

View Mark Wilson's profile

Mark Wilson

1751 posts in 526 days


#14 posted 08-25-2015 09:01 PM

And, now I’ve found it on the SS Site. Still see no way to mount an axial post. I’m barking up the wrong tree.

-- Mark

View JoeinGa's profile

JoeinGa

7481 posts in 1470 days


#15 posted 08-25-2015 09:07 PM

Mark, watch that video of the bowl saw Lou posted again. Stop it at 40 seconds and you can see he didn’t BEND the Sawzall blade, he cut a short piece of one and welded it on the end of a metal rod.

-- Perform A Random Act Of Kindness Today ... Pay It Forward

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