Hand Tools Archive

Re: Krenov style plane jams

David Weaver
The shape of the cap (generally the angle, but height if the cap is also thick and tall) has a lot to do with the ideal wear.

Most of the inexpensive machine made wooden planes that I've seen lately address the issue of not having a very good cap iron or good finish level by just making the wear very steep or making it very short.

The roughness can, of course, be a problem, too, but a bad angle match with the cap iron and it'll clog.

I don't know a formula for this, but would guess if the fat part of the cap away from the point of contact is narrowing any significant amount toward the wear (which can occur if fixing the problem by opening the mouth instead of steepening the wear), there will be trouble.

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