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Author Topic: what tool is best for concaving?  (Read 4671 times)

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brokenbat

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what tool is best for concaving?
« on: March 18, 2014, 07:10:20 PM »

I need to add some concaving to a bat to recreate the spine (I had basically reduced the spine using a drawknife, and am left with a "flat" shape"). What can I use? I have heard of these No.4 and No.5 travishers but can't seem to find anything reasonably priced. Would this be a good substitute: http://www.amazon.com/Kunz-German-Convex-Spokeshave/dp/B00076Q9SO/ref=sr_1_2?ie=UTF8&qid=1395168689&sr=8-2&keywords=convex+spokeshave ?

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smilley792

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Re: what tool is best for concaving?
« Reply #1 on: March 18, 2014, 07:13:14 PM »

With bat making tools does the age old saying of "you buy cheap, you buy twice" not matter?


I found these when looking
http://www.oldtools.free-online.co.uk/shop/ray_iles_travisher.html
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Ryan

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Re: what tool is best for concaving?
« Reply #2 on: March 18, 2014, 07:18:44 PM »

These are excellent value for money.

http://www.tomthackray.co.uk/shop/
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brokenbat

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Re: what tool is best for concaving?
« Reply #3 on: March 18, 2014, 08:14:39 PM »

ok so the convex spokeshave is no good?
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Ryan

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Re: what tool is best for concaving?
« Reply #4 on: March 18, 2014, 08:42:46 PM »

ok so the convex spokeshave is no good?

I haven't used that kind before so not sure, I find the wooden type better.
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Number 11

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Re: what tool is best for concaving?
« Reply #5 on: March 19, 2014, 01:41:18 AM »

Have a hunt on Ebay for round bottom planes, something like this might give you more control.
http://www.ebay.co.uk/itm/Round-no-16-moulding-plane-by-W-Sarjent-/151229955100?pt=UK_Collectable_ToolsHasdware_RL&hash=item233601fc1c
Largest size is generally a No.18 but larger ones do pop up.
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Fezballoh

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Re: what tool is best for concaving?
« Reply #6 on: March 19, 2014, 07:28:54 AM »

Keep your eyes open for heel shaves. They're leather working tools but slice through willow! ( scroll down on this link and you'll see a bunch of them:  http://forum.woodenboat.com/showthread.php?90710-Carvel-Plank-Planing)

I got a travisher but I'm not convinced the body is right as I never managed to get any purchase on the wood  I think this is because they are traditionally supposed to be used across, rather than along the grain.

Your other option is to convert a wooden plane (there's an example on the same link) which is great for rapid removal of stock. You can pick up old coffin plans for a fiver if you're lucky and the old steel is amazing.
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brokenbat

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Re: what tool is best for concaving?
« Reply #8 on: March 19, 2014, 01:36:10 PM »

I use both a travisher and a round bottom plane. Travisher for the removal of most of the wood and then the round bottom plane for fine tuning. couldnt live without my travishers. Ive got a very shallow one and a more pronounced on.

the snell atherton is good. pretty much a travisher just a metal version.
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brokenbat

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Re: what tool is best for concaving?
« Reply #9 on: March 19, 2014, 02:06:24 PM »

thanks. I think its more fine tuning in my case. would this be the equivalent of a round bottom plane: http://www.amazon.com/Robert-Larson-580-1050-Bottom-Spokeshave/dp/B000JRDLWS/ref=sr_1_2?s=hi&ie=UTF8&qid=1395237912&sr=1-2&keywords=round+bottom+plane
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ajmw89

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Re: what tool is best for concaving?
« Reply #10 on: March 19, 2014, 02:11:22 PM »

thanks. I think its more fine tuning in my case. would this be the equivalent of a round bottom plane: http://www.amazon.com/Robert-Larson-580-1050-Bottom-Spokeshave/dp/B000JRDLWS/ref=sr_1_2?s=hi&ie=UTF8&qid=1395237912&sr=1-2&keywords=round+bottom+plane


No, although you do need one of those for doing shoulders.  They're not much good for concaving

Red Ink Cricket

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Re: what tool is best for concaving?
« Reply #11 on: March 19, 2014, 02:27:16 PM »

thanks. I think its more fine tuning in my case. would this be the equivalent of a round bottom plane: http://www.amazon.com/Robert-Larson-580-1050-Bottom-Spokeshave/dp/B000JRDLWS/ref=sr_1_2?s=hi&ie=UTF8&qid=1395237912&sr=1-2&keywords=round+bottom+plane


can you post a picture of what the bat is like and what you need to do. unless the bat was concaved before and had reasonable concaving towards the toe it should be easy to re shape the spine without the use of a travisher etc
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brokenbat

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Re: what tool is best for concaving?
« Reply #12 on: March 19, 2014, 09:22:49 PM »

yes will try. seem to be doing something wrong. keep getting an "Cannot access attachments upload path!" error.
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brokenbat

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Re: what tool is best for concaving?
« Reply #13 on: March 19, 2014, 09:36:12 PM »

can you post a picture of what the bat is like and what you need to do. unless the bat was concaved before and had reasonable concaving towards the toe it should be easy to re shape the spine without the use of a travisher etc


here is the pic.



as you can see, the spine runs down to the point where I chopped off a bit. And that part is now a triangular shape. I would like to change that triangular shape, and recreate the spine there.
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Ryan

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Re: what tool is best for concaving?
« Reply #14 on: March 19, 2014, 09:44:28 PM »

I'm assuming that the triangle section is the toe of the bat?

You could use a drawknife/ Travisher/ round bottom plane ( moulding plane) to re-shape.

Where are you based? I'd drop im to your local pod shaver or forum sponsor to finish it off. It'll be cheaper and guarantee the shape and check the balance.
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