Scrub Plane Camber Calculator

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Blog entry by TheGravedigger posted 11-21-2010 04:07 PM 1422 reads 1 time favorited 2 comments Add to Favorites Watch

After my recent Little Good Pieces post, “Scrub Plane on the Cheap”, I received a comment by Swirt from Timber Frame Tools. It had some great info, and I’d like to repost a portion of it here for those that don’t read my blog or its comments:

“Good article Robert. I’ve been using a No5 as a scrub for a long time and it works well. To get the most out of any given scrub, the amount of curve can be optimized without too much trouble. The recommendation of 3″ radius works for the narrow blade of the No40 but is too much for the 2″wide blade of a No4 or 5. Here is a bit I put together and includes a calculator where you can enter the dimensions of a specific plane and the depth you want to achieve and it spits out the right amount of camber
The calculator is way down at the bottom.”

I was glad he brought this to my attention. I had never given a thought to optimizing camber on a scrub plane, and will give this a try. If any of the rest of you do, leave a comment here to let us know if it helps you.

While you’re over there, check out the rest of the site. He’s got lots of great info there for the hand-tool woodworker.

-- Robert - Visit my woodworking blog:

2 comments so far

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19688 posts in 4558 days

#1 posted 11-22-2010 08:56 AM

Thanks for the info.

-- Bob in WW ~ "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

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5564 posts in 3854 days

#2 posted 11-22-2010 04:42 PM

Thanks Gravedigger. I made that calculator a few weeks back and added it to that older blog post on my blog. I sometimes have to do these mathematical things to keep my braincells from getting soft. ;)

-- Galootish log blog,

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