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Plane Iron Camber

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Forum topic by Gerald Thompson posted 07-17-2016 12:22 AM 285 views 0 times favorited 5 replies Add to Favorites Watch
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Gerald Thompson

808 posts in 1696 days


07-17-2016 12:22 AM

I am in the midst of learning how to hollow grind plane irons. I tried the Lee Valley jig that clamps the object to be ground and then one slides it across the spinning stone. That did not work for me. It just seemed too cumbersome.
So I stepped into the unknown and did it just using the tool rest. It was not 5 min. and I have what I wanted on an old Stanley iron from a #5.
I had another old iron that I could not tell who made it but it was thicker and nicked up. I thought what the hell give it a go. So I marked out a free hand black line to use as a guide and went after it.
Long story short. It was right on the money at around 25d and the camber looked as it a grinding jib was used. I will mark this up to beginners luck. When one does not really care if disaster happens one is a lot less tense.
Now I need to learn how to sharpen a camber. It took the stone to the iron and went through the grits but I is still not whisker cutting sharp.
After all these years of fear of using a powered grinder and finding out the I could do it opens up new opportunities for me.
The cambered iron had the last laugh. I cannot fine a plane it will fit. It is too wide, just barley for a SB #5. I have a Miller Falls 18 which is a SB #6 and it will not fit in there either. It did give me practice though.

-- Jerry


5 replies so far

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Andre

1022 posts in 1267 days


#1 posted 07-17-2016 05:27 AM

I use a Lee Valley White stone on a hand powered grinding wheel to hollow grind all my chisels and plane irons, takes a little practice but results are worth the effort.

-- Lifting one end of the plank.

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bandit571

14553 posts in 2144 days


#2 posted 07-17-2016 05:40 AM

Made a jig for my grinder awhile back..

I replace the one tool rest with a slab of wood. Can adjust to the angle I need. Freehand, or use a slider jig

Cambers I do freehand. Black Sharpie to mark it out on the flat side.

-- A Planer? I'M the planer, this is what I use

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Don W

17960 posts in 2029 days


#3 posted 07-17-2016 02:09 PM

I have narrowed irons to fit. Use the power grinder and clean them up on sand paper. Just remember to take a little off both sides.

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

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Tim

3112 posts in 1423 days


#4 posted 07-17-2016 10:51 PM



Now I need to learn how to sharpen a camber. It took the stone to the iron and went through the grits but I is still not whisker cutting sharp.
- Gerald Thompson

There’s a video out there by Chris Schwarz I think on how to sharpen a cambered iron, but I can’t find it right now. Basically you make an X shape on the stone by pulling the iron back first on one side of the stone, then from the other side. On both pulls you rotate the iron to cover the whole bevel. Wish I could find the video, it’s easier to see than explain. Still couldn’t find a video but here’s an article that may explain it better than I did:
http://www.popularwoodworking.com/woodworking-blogs/chris-schwarz-blog/sharpen-a-fore-plane

Here is one from Garret Hack, but it’s for a just barely cambered iron for a smoothing plane. I don’t think it would work for a more cambered jack plane iron, but it’s possible you could make it work.
https://www.youtube.com/watch?v=Lp9XEnvmJzg

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bandit571

14553 posts in 2144 days


#5 posted 07-17-2016 11:10 PM

Hand plane basics/ The Woodwright’s Shop with C. Schwarz….pbs.org.

The Schwarz used a “figure 8” pattern on the arky stones.

-- A Planer? I'M the planer, this is what I use

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