Don & Galoots,

On my Stanley 40 with a 1 1/4" wide blade the protrusion of the arc is 1/8"
beyond the corners of the iron.

Marv Paisner
Kootenay Lake, BC


-----Original Message-----
From: oldtools@g... [mailto:oldtools@g...] On Behalf Of Don Schwartz
Sent: May-07-21 12:31 PM
To: oldtools@g...
Subject: Re: [oldtools] Scrub planes

Not sure if it's just me but I find it hard to visualize the difference between
various radii on plane iron edges. I know that if I'm grinding a new radius on
an iron which has a straight edge, I might draw an arc with a compass, then hold
my iron against the arc to see how much projection or camber I want when
grinding. But from then on, it's all about camber for me - i.e., how much does
the center of the edge project beyond the corners of the iron? 1/16th, 1/8th
etc. Bigger on a block plane or scrub, smaller on a bench plane. Easier to
visualize and check IME. Exact measurement not so critical.

FWIW
Don



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