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help with HF notcher

Discussion in 'The Garage' started by Impex, Jun 16, 2004.

  1. Impex

    Impex 1/2 ton status

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    1.5 hole saw cutting 1.5 tubing, the hole cuts off more to one side than the other...am i doing something wrong?

    dosen't cut enough

    cuts to far
     
  2. 85mudblazin

    85mudblazin 1/2 ton status

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    does your hole saw fit snug into the guid to the tube? is so then maybe the centering is off a little or loose.
    /forums/images/graemlins/thumb.gif
     
  3. big83chevy4x4

    big83chevy4x4 3/4 ton status

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    mine does the same thing, im also cutting 1.5" with 1.5". im saving to by a protools notcher /forums/images/graemlins/waytogo.gif
     
  4. DPI

    DPI 1/2 ton status

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    The hole saw is not centered on the tube. The saw is too close to the notcher, you can use some washers to move it out until it is centered with the hold down strap/tube. Put the washers between the backing plate and the clamp assembly that holds the tube. There are two bolts that hold the clamp assembly to the backing plate. However, you might need more than two washers to move it out far enough to center it.

    This is how I fixed mine...
     
  5. BadDog

    BadDog SOL Staff Member Super Moderator Author

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    Yes, HF or other similar notchers (even the more expensive ones) often need a bit of shimming to make them work right. Problem is, any little bit off, even due to "stack" tolerances that are individually within spec, multiplied over the length of the bar, can get it off by 1/8" or more easily. Mine is pretty close but not perfect.

    Here is another bit of advice. Cut it first. Figure out where the base of the fish-mouth will be, and add about 1/3 the width of the tube you will be joining. This way the saw only makes half the cut, and you don't wind up with razor edge ears that have to be ground down anyway. Saves the saw which lasts twice as long, and even if it's off a little bit, it doesn't really matter.
     
  6. FWP

    FWP CRS

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    Your doing ok, that thing is a POS, but it works. I just use the grinder to clean it up a bit when I'm done cutting...
     
  7. Greg72

    Greg72 "Might As Well..." Staff Member Super Moderator

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    Russ has it right.....you can't "holesaw" through the middle of a tube!!! /forums/images/graemlins/yikes.gif

    It's an end-notcher...if you're trying to notch 2" tube the cutting blade should only have about 3/4" over the tube, and the rest of the blade should be hanging over the edge of the work.

    It's amazing that you were able to cut as deep as you did, with that much drag the blade should have been binding up and chattering like crazy!!!!!

    /forums/images/graemlins/thinking.gif
     
  8. jjlaughner

    jjlaughner 3/4 ton status

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    What about using a 1 7/16" hole saw? /forums/images/graemlins/thinking.gif
     
  9. Greg72

    Greg72 "Might As Well..." Staff Member Super Moderator

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    [ QUOTE ]
    What about using a 1 7/16" hole saw? /forums/images/graemlins/thinking.gif

    [/ QUOTE ]

    .474375" over the tube.

    .963125" hanging over the end.



    Smarta$$ /forums/images/graemlins/grin.gif
     
  10. jjlaughner

    jjlaughner 3/4 ton status

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    so is that good or bad? /forums/images/graemlins/dunno.gif /forums/images/graemlins/confused.gif
     
  11. Impex

    Impex 1/2 ton status

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    i just cut it in the center to show so i could take a pic (if you look close i tried notching the very end and didn't work)
     

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