Reply by drsurfrat

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Posted on Tip: Closing the Mouth on a Fixed-mouth Block Plane

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211 posts in 101 days

#1 posted 09-19-2020 03:40 PM

Relief angle, good descriptive word. thank you

Low angle blocks already have an adjustable mouth, so no need to do this.
In this case it’s for those cheapies with 38-45 degree bed angle. I think (?) the relief angle undercut on the cheap blade could be as low as 1 degree, almost parallel to the plane sole, just so it clears the wood. I the the 12 degree low angle is just so that there is (barely) enough meat in the casting to hold the blade without cracking.

-- Mike (near Boston) ... Laziness is the mother of invention, necessity is the mother of exhaustion - me

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