Jointing Saw Plate

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  • #133844
    raze599
    Participant

    Hi all

    I bought a new saw to restore, and when I got it I realised it needed new teeth so I filed the old ones away. Now it turns out that after all the filing (maybe it might have been like this even before I’m not sure) that the plate isn’t entirely straight along the edge but theres a slight convex curve along its length.

    Is this something I can leave or should I keep filing to make it straight?

    #133846
    roofusson
    Participant

    Have read that some saws were made this way. though I don’t recall the logic behimd it. cheers Peter

    #133853
    markh
    Participant

    Yes the slightly convex curve on the sawplate is called “breasting” on a handsaw. It is supposed to have some effect on the mechanics of sawing but I’m not sure that I understand it fully. If you have a look at the British handsaw manufacturer Thomas Flinn and Co under their PAX Hand Saws range you will see the term “breasting” listed as a feature of the Pax handsaw type. It keeps “fewer teeth in contact with the wood and thereby minimizes friction”. See the webpage:
    http://www.flinn-garlick-saws.co.uk/acatalog/Pax_Handsaw.html#SID=434
    I hope that that pasted link works.
    Cheers
    MarkH

    #133857
    raze599
    Participant

    Thanks for the replies guys but I went ahead and filed it to make it mostly straight. Didn’t want to go against the norm on something which may affect performance.

    #133863
    ehisey
    Participant

    Breasting sounds like a terrible idea from an efficiency stand point. You would be effectively reducing the TPI of the saw.

    Tuscloosa, Alabama
    Lung T'an Hu Huesh Kung-fu Woodshop

    #133944
    Mark Armstrong
    Participant

    Breasted saws working incredibly well.
    Saw Manufacturers usually only put this on there top range of hand saws.
    I have a Spear & Jackson 26″ rip 6 tpi and a Sandvik 26″ x cut 8tpi both breasted.
    Lost count how many saws I have must be around 25-30 Mark

    Dagenham, Essex, England

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