Curved-Bottom Hand Plane

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Forum topic by Anapolis7 posted 06-19-2010 04:36 AM 9147 views 0 times favorited 4 replies Add to Favorites Watch
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50 posts in 2946 days

06-19-2010 04:36 AM

Topic tags/keywords: curve plane hand concave convex handplane wooden handplane

I have recently been working to build a replacement handle for a framing hammer. I am hoping to get it done by Father’s Day, but given the Texas heat and my perfectionistic approach, it’s not looking good.

My design for this handle essentially involves two opposed concave curves. Admittedly, the best approach would likely involve making a template and working out the shape there, followed by a pattern bit. But I have already dove head-long into this.

My question is this: Is there such a thing as a plane with a convex bottom? I am guessing that you could technically build it but the utility would likely be limited to a specific curve due to the plane-to-wood contact needed, especially in the throat. I suspect that you could easily make the front and back adjustable/replaceable if it was a wood plane but the throat contact would be hard to control. Anyone have any ideas? Not really a burning issue, but an engineering riddle for our collective group to ponder. Thanks for the help!


4 replies so far

View a1Jim's profile


117128 posts in 3606 days

#1 posted 06-19-2010 04:41 AM

How about a spoke shave?

-- wood crafting & woodworking classes

View lwllms's profile


555 posts in 3311 days

#2 posted 06-19-2010 04:47 AM

Yes, there are planes with convex curved bottoms. Some have fixed curves and some are adjustable. There are both wood and metal versions of the adjustable compass planes but I believe only wooden fixed ones. Look at the Stanley #113 or the #20 for examples of adjustable metal compass planes. There are also radius planes that are curved along their length and most common of these are compassed fillisters but these are wooden planes.

View swirt's profile


2786 posts in 3001 days

#3 posted 06-19-2010 04:50 AM

convex in what direction?

The compas plane has a convex sole form toe to heel. Many wood ones exist with a fixed curve, but there are also some metal ones that have adjustable curves. (somebody on here just had a post about one of these within the past few days)

See #113 here

A “round” is a plane that has a convex sole from side to side. Lots of wooden ones exist with a variety of sizes.

And as Jim mentioned, spoke shaves can be had with both convex soles front to back and side to side.

-- Galootish log blog,

View Anapolis7's profile


50 posts in 2946 days

#4 posted 06-19-2010 05:20 AM

Thanks for the input. A spokeshave seems like a good bet for my current situation, but I will look into the convex plane as well. I just enjoy tinkering.

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