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Saw teeth reforming and spacing

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Previous Back to: Tools and Tool Maintenance/Restoration5 Replies

Welcome! / Forums / General Woodworking Discussions / Tools and Tool Maintenance/Restoration / Saw teeth reforming and spacing

  • This topic has 5 replies, 3 voices, and was last updated 3 years, 1 month ago by bow.
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  • bow
    31 December 2019 at 7:46 pm #641533

    Good evening and Happy 2020!
    I own some frame saw blades. The Blade i use the most Is 6 Tpi , ripcut. After some sharpenings during last year i want to file 0°of take, i want an aggressive tooth: all that i Need here Is a file holder, something i ‘ m able to build with a small piece of wood that takes my file plumb and straight. But here begins my trouble: After jointing the teeth, what’s the correct way to space the teeth evenly? I Need some simple and doable.

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    Larry Geib
    1 January 2020 at 12:24 am #641602

    Here ya go.

    As to spacing 6 tpi, a proper carpenter’s steel square has one of its scales as twelfths of an inch.

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    Stewart Perry
    1 January 2020 at 9:45 am #641700

    Also if you have a metric ruler, 4mm spacing would give you very close to 6 Tpi. If you need to accurately divide an inch into 6, draw a right-angled triangle with one of the short sides 1″ and with a 1.5″ hypotenuse. Then mark off 1/4″ points on the hypotenuse and drop them perpendicular onto the 1″ side, to leave you with six evenly-spaced points on the 1″ line. Obviously you can extend this technique for any Tpi by choosing suitable lengths and divisions. I recall that Paul Sellers demonstrates a similar trick for dovetail spacing in one of his videos.

    Going back to the original question – if the existing teeth are evenly spaced and you just want to change the rake then you may not need to file them off completely. In which case if you still want to use Paul’s jig, you should transfer the tooth spacing from your blade onto the jig using the trick he demonstrates with a hacksaw blade.

    Stu - Surrey, UK

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    bow
    1 January 2020 at 10:40 am #641718

    Many thanks for your replies. Now i get reshaping and reforming teeth ( if needed)
    What if existing teeth are well shaped but not evenly spaced?

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    Larry Geib
    1 January 2020 at 5:47 pm #641809

    If it is just a few teeth, You can move teeth forwards or backwards with a saw file with one safe face ( grind or dull one face with a diamond plate) in the course of normal sharpening. It might take more than one jointing/sharpening cycle.

    I find that easier than trying to just use pressure on a file do move a tooth or filing off the teeth and starting over.

    Settings
    bow
    2 January 2020 at 1:12 pm #642053

    i’ve never tought about a safe edge, triangular file! your idea is simply brillant. i believe it makes simpler jointing&spacing teeth

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