Effects of a cap iron video

[andersonec]

I saw this video before but have now found it with English subtitles so can now understand what's going on, it's very interesting and may confirm what is already known but nice to see an actual scientific study of something so common as a cap iron.

http://vimeo.com/41372857

Andy

 

[Dovetaildave]

Yup , its way better understanding and not having to guess what is happening.

When planing against the grain;
Chip breaker/iron 80 deg on the blade of 30+10= 40 deg......... total 120 deg chip breaker.
Chip breaker is . 3 mm away from cutting edge.

This throws up two questions for me.......

As I so rarely plane against the grain, what was the info gleamed when planed with the grain?

Should I be blunting the leading edge (80 deg) of my chip breaker/iron then :?:

 

[Corneel]

No you don't need to steepen the front edge of a Stanley style chipbreaker. It works allright at the angle it is. Some new planes.like Lie Nilesen have very flat chipbreakers, they can use some blunting of the front edge.

When not planing against the grain you won't need the chipbreaker effect. Pull it back a little bit, because with the chipbreaker very close to the edge you must oush harder. Of course you always try to plane with the grain, but wood isn't always perfect staright and easy, so it is good to have this trick in the bag.

 

[chipmunk]

Here's an analysis of the findings from "another place"...

http://www.woodcentral.com/cgi-bin/readarticle.pl?dir=newarticles&file=articles_935.shtml

Useful for interlocked grain.

HTH
Jon

 

[Togalosh]

Fantastic links - thanks for taking the time to post them.

I've been struggling with planing some teak & this should sort that out !

Thanks again Gents

 

[keithkarl2007]

I love videos like these. Thanks for posting it.