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Making Plane Irons out of 0-1 Tool Steel

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Forum topic by andy6601 posted 04-22-2014 02:37 AM 641 views 1 time favorited 6 replies Add to Favorites Watch
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andy6601

84 posts in 1219 days


04-22-2014 02:37 AM

I am wondering if anyone has made their own plane irons on LJ and what I am looking to do is make replacement irons for a Stanley 104 tongue and groove plane that I have and also I have some neat wooden moldign planes that are missing the irons. I am looking to do it because I really don’t have an alternative I check on St James Bay Tools they carry Stanley parts but they do not have anything. So I was wondering where is the best place to buy the steel and once it is formed the process to heat treat the steel. Any advice would be great, thanks!


6 replies so far

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lwllms

549 posts in 2033 days


#1 posted 04-22-2014 03:33 AM

Tapered molding plane iron blanks are available from Lie-Nielsen but they need to be heat treated after shaping them. You can buy O-1 tool steel from Enco . Heat treating is actually pretty easy. Here’s a short video of what to look for when bringing the steel to critical temperature after preheating. BTW, I have made a lot of plane irons.

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andy6601

84 posts in 1219 days


#2 posted 04-22-2014 02:53 PM

lwllms,
Thanks for the advice I saw Lie-Nielson sells them but I have a metal band saw and metal files I think I can fashion my own cheaper than buying it already cut. I will check out your video, Thanks!

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Ocelot

666 posts in 1389 days


#3 posted 04-22-2014 07:57 PM

So, you don’t just make ‘em out of old mower blades?

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Don W

15560 posts in 1319 days


#4 posted 04-23-2014 11:13 PM

I’ve bought from Mcmaster Carr as well.

-- Master hand plane hoarder. - http://timetestedtools.com

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andy6601

84 posts in 1219 days


#5 posted 04-24-2014 12:50 AM

lwllms,
I watched your video and have a question, once the metal burns off a little bit of carbon and you remove it from the heat, do you quench it in water or oil or just “air” quench it by leaving it to cool down on its own?

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lwllms

549 posts in 2033 days


#6 posted 04-24-2014 01:12 AM

We were using O-1 steel in the video so we quenched in oil but this works with water hardening steel too. I first read about watching for the small pools of iron to form on the steel in a 1938 Machinery’s Handbook in a section on heat treating high speed steel which is air quenched. I’d read similar descriptions in other old texts but they were always vague in what to look for. They described it as things like “when the steel opens,” “when it sweats,” or “when the flux rises.” The Machinery’s Handbook was the first one I read and thought “I know what that is, I’ve seen it.” The video was done just to show the visual indication of the phase change to austenite which is when you want to quench. There’s more involved.

To get the pools to form on the surface everything has to be clean. To make it dependable and repeatable you need to preheat the steel to a uniform black color and you need a torch that puts out enough heat to heat the steel uniformly.

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