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Thread: Moulding Planes

  1. 7th May 2012, 07:32 PM #1
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    Default Moulding Planes

    I was just moving a french moulding plane that came my way finally out to the garage, and this thought occurred to me ...

    Why isn't a moulding plane base like a jointer table? and ditto for plows and dados?
    That is, having the rear section of the base lower than the front section by the depth of cut.

    I know for a start that if you did that you have a plane with one fixed cutting depth (sorta).

    Is it theoretically ideal but not practically necessary?

    Actually now that I think of it ... we take a lot of trouble to level the base of all planes ... but an electric planer works like a small jointer table upside-down.

    So ... what do you think?
    Maybe there is a link that will settle my poor grey matter?


    Paul.
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  3. 7th May 2012, 07:44 PM #2
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    Hmm, sounds all well and good for timber that meets a set of rotating blades, but for timber that meets a fixed blade, it would be like hitting a wall.
    My wrists hurt just thinking about it.
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  4. 7th May 2012, 07:45 PM #3
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    I think the main reason is that hand planes don't take a deep enough cut to make it practical
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  5. 7th May 2012, 08:28 PM #4
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    Yes ... I was thinking some more about it ...

    The electric planer dials up 1mm, 2mm, ... equal to roughly 40 thou per mm ...

    I wonder how much a scrub plane can remove?
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  6. 7th May 2012, 08:50 PM #5
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    Here is a somewhat exaggerated picture of the idea.
    If the front part of the sole was presented flat on the workpiece, the blade would simply hit the wall when it encountered the back edge of the timber.
    If the timber was planed starting anywhere else along its length, then the plane would effectively ride on two points -one at the front and the other at the blade, or if it managed to cut, then the back of the mouth.
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