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Thread: Advice re Teruo Miyanga chisels?
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18th October 2011, 03:16 AM #1
Advice re Teruo Miyanga chisels?
As some may know, at my current location I've no access to any power tools whatsoever... so I've been making dovetailed boxes by hand to assuage my sawdust addiction.
SWMBO, God bless her, overhead my mutterings about my "cheap bloody Hirsch chisels" and surprised me with a pair - 3 & 6mm - of Teruo Miyanaga dovetail chisels.
(Don't get me wrong; the Hirsch's are lovely tools. I was really only grumbling to myself about my lack of skill with dovetails... and hadn't realised she could understand my breathy murmurs. But even so I have no intentions whatsoever of returning her gift for a refund. )
The Miyanaga's are delights to use; nicely balanced and sized, ready to go straight out of the box. Because it felt 'wrong' to not do something before their first use, I gave them a touch up with a 10k waterstone... but this really wasn't needed. At all.
Which brings me to the reason for this post...
The handles are White Oak, but whatever they were finished with seems to be 'matting off' already. I'm undecided whether to remove the hoops so I can remove the original finish and oil the handles instead. Or to just persevere with them as is. It's not important, they're going to be users after all, but I would like them to stay looking 'pretty' as long as possible.
Secondly, the last inch or so of the 3mm chisel obviously flared out during manufacture and to bring it back to size he ground away the sides of the tip.
In effect, it has changed the working end from a dovetail profile to that of a firmer. Almost pentagonal. It's only the last inch or so, after which these side facets taper away to nothing, returning to the more expected dovetail profile. Close inspection shows that these facets also only go up to the lamination line, with the softer 'body steel' being untouched. (I hope that makes sense?)
I've no idea whether this is normal or not, but it does make cleaning up the angles in tight pins/tails more difficult.
So, before I start laboriously grinding the sides back into a dovetail profile (all by hand, remember!) is there any reason I shouldn't do this?
Any advice appreciated; I'm treading unknown waters here.
- Andy Mc
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18th October 2011, 07:23 AM #2
They sound like great chisels Skew.
On the couple of Japenese chisels that I have, the handles came with a lacquer coating. I carefully scraped it off, gave them a light sand, and oiled them. They are much nicer now.
I'll leave the advise on the blade to more knowledgeable folk than I.
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18th October 2011, 11:43 AM #3
Hi Skew,
I am with Ironwood here regarding the handles. I have some old (and abused) Jampanese chisels with handles that are ioled, no lacquer, and I have a couple with new lacquered handles. I intend to remove the lacquer, sand, oil and wax these handles. I much prefer this finish to the lacquer.
Regarding the 'Dovetail' chisels, (and I am no authority here by far), I believe that the name comes for the chisel shape in profile, that of a dovetail and not from the intended use of the chisel. As such these japanese Dovetail chisels will have shuolders, not unlike Western bench chisels liek Marples. So these Dovetail chisels will have a little difficulty in getting into the tight corners of dovetails, just like any chisel with shoulders. AIthough I would think the 3mm chisel would have a good go at the corners.
Some people have dedicated, (minimal shoulder) chisels for these tight corners. And some people say there is no need for this type of minimal shoulder chisel as they just lean the chisel over to get into the corner and dedicated chisels are unnecessary.
Regardless, minimal shoulder chisels in dovetail work have their place. I think Derek Cohen's website has information on grinding chisel shoulders specifically for this type of work. Might pay to have a browse through Derek's articles. This is the link, I think it will work from here, maybe,
. http://www.inthewoodshop.com
I have also heard of, (read it somewhere) where Japanese chisel makers do make chisels with minimal shoulders for dovetail work. Personally I do not see a problem with your plan, but how to go about it and the details for the end shape I will leave to others that have done it.
I believe that the Miyanga chisels are quite descent chisels, (but others with the knowledge might like to confirm). I might also be good to see a photo, (if at all possible) of the 3mm chisel in question for a better understanding of the chisel profile.
So nice score I reckon, your SWMBO is a real gem by my book.
Cheers
Pops
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19th October 2011, 12:45 AM #4
Thanks, fellas. It looks like a quick oiling is the go then.
And I agree wholeheartedly about SWMBO, Pops. I think she's a keeper.
Pix will be forthcoming once I can recharge the camera batteries. (Apparently using a 240VAC charger in 110VAC mains does not simply mean they'll take twice as long to charge. )
My main concern with the tip profile is that I'd anticipated using it for very thin pins - I'm slowly becoming braver - where there's not a lot of room to 'angle' the chisel for skew cutting.
Even so, methinks I'll wait until I hear something from the more knowledgable before I do something I may regret.
- Andy Mc
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19th October 2011, 11:56 AM #5
OK. Some pix to (hopefully) show what I mean about the tip on the 3mm chisel.
1.
2. Overhead view of the bevel. Hopefully you can see the flats to each side. (That's not rust... I just didn't clean her after playing)
3. Side view... you can barely make out the tapered flats. They're not as large as they seem in the pic. (I'm a woodie, not a photographer.)
- Andy Mc
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19th October 2011, 03:40 PM #6
Get it replaced. Now.
Surprised it looks like that, and that it passed through so many hands and this most obvious fault was missed so many times end up in your hands looking like that.
Actually, I'm extremely disgusted it was allowed to get out of where you bought it.
Stu.
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20th October 2011, 12:25 PM #7
+ 1, to Stu's comments.
Stay sharp and stay safe!
Neil
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