Mortise pairing by hand

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  • #10827
    bow
    Participant

    Hello!    I’m training on doing mortises using chisel and mallet.   How to pair the bottom of the mortise by hand? I have  no  room to use a  router plane… And, last question , how to square mortise face to the bottom? i want to use only hand tools..

    #10828
    Ken
    Participant
    #10830
    Florian
    Participant

    Hi Carlo,

    you can pair the bottom with the chisel bevel-down.

    I enjoy working wood in Germany.

    #10837
    bow
    Participant

    Hi Ken and Florian!

    I use standard chisel to chop mortise, like Paul does in the video linked above. I have to work on really small mortises  and they must be stright and squared because i have to glue in a patch of good oak.  Mortise sizes are : 1,5 cm length  for 1 cm width or 1 cm depth in the wood.    Too short, to use a plane and  a router.

    Probably a liuthery  plane… Or i have to become skilled on using the chisel..any tricks?

    #10839
    Ken
    Participant

    Carlo, you could use a forstner bit to drill out the bulk, this would give you a nice flat bottom, Then finnish with a chisel. Or you could use a chisel, and a small router plane.

    Attachments:
    #10841
    robinhc
    Participant

    Or i have to become skilled on using the chisel..any tricks?

    Carlo @bow … Use a knife wall to establish the walls of the mortise. Chop the mortise half way thru from the top, and then flip the piece over and chop the other half from the bottom.  Every so often, check to see that your chesil is straight up and down, so that the top and bottom half of the mortise meet in the middle.  You can also make a jig to keep the chisel straight.

    If the mortise is not all the way thru, the bottom of the mortus does not have to perfectly flat. The strength of the joint comes from the sides of the tenon in contact with the sides of the mortise. A little space between the end of the tenon and the bottom of the mortise is not a bad thing.

    Watch Pauls videos on chopping a mortus.

     

    Robin ... Richmond, Virginia, USA

    #10843
    Ken
    Participant

    HaHa Robin, did you even read Carlo’s post. He wants to glue in a patch of good oak, not chop a through mortice buddy. 😉

    #10862
    jgust747
    Participant

    Could you use the chisel and some smaller chisels in a poor mans router setup to square the mortise?

    Dallas, Texas

    #10883
    Dave
    Participant

    Umm, I think a swan neck chisel is supposed to help out smoothing the bottom of a mortise.  like this http://www.leevalley.com/en/Wood/page.aspx?p=30266&cat=1,41504,41533&ap=1

    I’ve never really worried about the bottom of a mortise so long as its deep enough to let the tenon seat properly.

    -Canada

    #10898
    bow
    Participant

    Tjanks you all. Below are linked  two pictures that reprsent what i have to do:

    #10899
    bow
    Participant

    Above is depicted the starting condition..  Next photo regards the mortise i have to do…with wood chopped away:

    #10900
    bow
    Participant

    Ant this last photo depicts the wooden Patches glued and fitted:

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