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  1. #1
    Join Date
    Mar 2009
    Lincoln AR


    I got a finger joint router bit and I called MLCS (might be wring on the mane but their uo there with amamna, to ask the recommend speed. They told me 2,500 rpm. My Bosch turns at 24,1100. This seems extremely slow and under load it will be under that. Any recommendations or are the right. I would think 14 or 15 thousand would be more in line.

    Thanks Bill

    PS bit is about 6" long 1/2 shaft it's about half and half shaft and teeth.

    Thanks Bill

  2. #2
    Join Date
    Mar 2007
    Escondido, CA
    It that is the bit I think it is, more like 10K - max. Rule of thumb, larger diameter, slowest speed. And for some I think only a shaper should be used!

    Seriously, two things here. Use the slowest router speed available, but no more than 10K. Then take small bites and work to finally depth of cut. 1/4" max at a time. The reason is that there is little room to evacuate the waste from the cut. If you overload the cutter, it gets hot and heat kills sharp edges. Real quick. And that is a pricey bit to kill prematurely.

    The retired Router Lady will retire to her corner again.

  3. #3
    Join Date
    Jan 2007
    Last edited by John Bartley; 11-29-2010 at 02:06 PM.

  4. #4
    Join Date
    Sep 2007
    Bloomington MN USA
    It also makes a difference as to soft or hard wood for the speed. You should not exceed for depth of cut more then 1/2 the bit diameter. So if it is 1/2 diameter bit ....increase depth of cut only 1/4" at a time. At least thats what works for me. Also for finger joints use a backer board to help eliminate tear out.
    If you make a mistake it was part of the original plan!

  5. #5
    Join Date
    Dec 2006
    RETIRED(!) in Austintown, Ohio
    So...what's the difference between a 'finger joint' bit and any other half inch straight bit?

    A half inch straight bit can be run at full speed in a single speed router - 20,000 ~ 25,000 depending on the router.

    One problem with trying to make multiple passes for finger joints is getting the exact alignment each time you raise the bit. I've pretty much found that you need to make the joint in one pass - or else you'll have alignment problems.

    That's probably the main reason I make mine on the tablesaw. It's quicker and easier.
    Jim D.
    Adapt, Improvise, Overcome!

  6. #6
    Join Date
    Oct 2006
    somewhere east of Queen Creek, AZ - South East of Phoenix
    Quote Originally Posted by Jim DeLaney View Post
    That's probably the main reason I make mine on the tablesaw. It's quicker and easier.
    Me too.
    "There’s a lot of work being done today that doesn’t have any soul in it. The technique may be the utmost perfection, yet it is lifeless. It doesn’t have a soul. I hope my furniture has a soul to it." - Sam Maloof
    The Pessimist complains about the wind; The Optimist expects it to change;The Realist adjusts the sails.~ William Arthur Ward

  7. #7
    Join Date
    Oct 2006
    ABQ NM
    Quote Originally Posted by Jim DeLaney View Post
    So...what's the difference between a 'finger joint' bit and any other half inch straight bit? ...
    I suspect this is the type of finger joint bit we're talking about:
    When the going gets weird, the weird turn pro. - Hunter S. Thompson
    When the weird get going, they start their own forum. - Vaughn McMillan

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