Interlocked grain

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  • 19 Jan 2019 10:21 AM
    Reply # 7009932 on 6998453
    Anonymous wrote:

    Brian, your original post concerned the secondary bevel.  I'm a little confused, increasing the secondary bevel angle only achieves the objective of a high angle blade if your using a bevel up plane.  Hope that is what you meant.  With a bevel down plane the maximum bevel angle is about 33 degrees.  Theoretically the clearance angle required is 12 degrees because of the spring back after the blade passes over the cut site.  So hence the 33 degrees on a bevel down with a 45 degree frog and the 12 degree seating angle on a bevel up plane.  The "High Angle" referred to is at the front attack edge of the blade, the angle at which the blade first encounters the wood.

    Hope that helps.  Carry on.


    Hey Larry, sorry I never got back to you. I had been using both a low angle jack AND a No.4 smoother to plane the Khaya; I was curious about increasing the angle on the low-angle jack (finally have a spare blade for that one too). I've really gotten to like the low-angle jack for all sorts of things. It's becoming a go-to plane. And if set just right, can compete with a smooth plane for that silky smooth feel. But it simply wasn't "cutting it" with the interlocked grain.


  • 19 Jan 2019 10:37 AM
    Reply # 7009939 on 6997945

    Sorry everyone. My first post was just downright confusing. I'm not even sure what I was asking about. I was conflating two different things--the performance of my smooth plane AND action on a low-angle jack.

    Geez, must not have had enough coffee before I wrote...


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