Location of plane mouth

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Forum topic by lateralus819 posted 09-14-2013 01:53 PM 752 views 0 times favorited 2 replies Add to Favorites Watch
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2241 posts in 1857 days

09-14-2013 01:53 PM

I’m trying to decide on the mouth placement on my plane.

Rhett shared the formula but it seems odd. Is it something that should not be strayed from?

My plane is 10” long, so that puts the mouth at roughly 5.5” from the heel.

Also, would a 7/16” brass rod be too much for a wedge pin?

2 replies so far

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Mark Kornell

1169 posts in 2498 days

#1 posted 09-14-2013 11:07 PM

The recommendation in Finck’s book is 5/9 from the back of the plane (or 4/9 from the front). His explanation is that is a good location for balance and control of the plane front and back. For a bench plane, anyways, which it sounds like you are building. However, it is just a recommendation and there is no need to stick to it absolutely. If you think the mouth should be some other place, go for it!

7/16” brass rod would be fine. Too small could be a problem, but it would be hard to define “too large”. As long as it fits properly and doesn’t interfere with chips in the mouth, go for whatever looks good to you. Or whatever you have on hand…

-- Mark Kornell, Kornell Wood Design

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2241 posts in 1857 days

#2 posted 09-15-2013 01:20 AM

Thanks, I had it set at 2 inches in from the nose, but decided on 3. Gives me more room for a bun/knob up front.

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