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Plane irons: flat or curved

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Forum topic by Brett posted 03-10-2011 12:22 AM 752 views 0 times favorited 2 replies Add to Favorites Watch
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Brett

660 posts in 2142 days


03-10-2011 12:22 AM

I’ve noticed that some plane irons are ground with a straight cutting edge and others with a very slight curvature. Also, some irons have their corners rounded and other do not. What are the reasons for these differences, and how would I decide which way to grind an iron for a particular plane or application?

-- More tools, fewer machines.


2 replies so far

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Bill White

4448 posts in 3420 days


#1 posted 03-10-2011 12:27 AM

Rounding the edges of irons help reduce the tendancy of the iron to “dig in” on the edge of the cut. The radius gring is mostly used on jack (#5 usually) planes used to quickly reduce the surface of the workpiece. This cut will leave some very shallow grooves that are then removed by a smoother like a #4.
Hope this helps.
Bill

-- bill@magraphics.us

View Bill White's profile

Bill White

4448 posts in 3420 days


#2 posted 03-10-2011 12:28 AM

Ooops!! That should read GRIND not gring. Duh!
Bill

-- bill@magraphics.us

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