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Chip breaker question

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Forum topic by Oldelm posted 01-12-2013 11:37 PM 500 views 0 times favorited 2 replies Add to Favorites Watch
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Oldelm

75 posts in 833 days


01-12-2013 11:37 PM

Topic tags/keywords: planes chip breaker

Based on all the recent articles on the subject I have decide to reshape the chip breaker on my 409 to an 80 deg bevel. I believe this will work ok for a dedicated smoother. I don’t think it would work so well for another # 4 I use for general bench work or on my # 5 ’s or my # 6 that I use as a jointer. I would like to hear some opinions on chip breaker bevels for planes used for work other than smoothing.

-- Jim, Missouri


2 replies so far

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StumpyNubs

6194 posts in 1458 days


#1 posted 01-13-2013 01:19 AM

There was a great study on the effects of a chip breaker on a plane at different angles. Here's the link.

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Oldelm

75 posts in 833 days


#2 posted 01-13-2013 05:03 PM

Stumpy thanks for the heads up on the study. I had looked at it. I get the idea, at least I think so, of the steep grinds on the chip breaker. You might tell me if I have it wrong. The 80 deg. grind will get the plane to act somewhat like a card scrapper. If you try to take a larger shaving with it you are going to hit the wall so to speak. What I was looking for is an angle that works well for a bit heavier of a shaving for general use. I was trying to get there the easy way without having to experiment for myself. I would start out at 45 which would mean to me you would be 90 or so from the sole and see if that would turn a little heavier chip without making work like pushing a screwdriver. It looks like the original breakers are about 30 and that is probably ok for a jack plane. I just looking for a little better performance than that. I realize that many things can influence the performance.

-- Jim, Missouri

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