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Thread: Plate for Router table

  1. #1
    Join Date
    Mar 2009
    Location
    Leominster Mass
    Posts
    183

    Plate for Router table

    I am building a router table and one the of the items I purchased to accomplish this is a blank aluminum plate sold by Rockler for my Skill router.

    I removed the plate attached to the router by 4 screws and plan on drilling 4 holes into the plate to attach the router.

    My questions is: How can I best countersink the screws into the aluminum plate? I have some countersink bits, but they are specificly made for wood and I do not want to ruin them trying to drill into aluminum. Do I need to buy a countersink bit specifically made for metal? Suggestions for inexpensive way of getting this done?

    Thanks
    Dan
    Dan Thibert
    Leominster MA

  2. #2
    Dan,
    A through-hole (zero-flute) countersink is about the best for any material. If this is what you have, don't worry about a few holes harming it. I use ours on everything from stainless steel, to aluminum, to wood.

  3. #3
    Join Date
    Mar 2009
    Location
    Leominster Mass
    Posts
    183
    What I have is:

    http://www.amazon.com/Jore-ST-05714-...501419&sr=1-26

    I do not think it will be strong enough.
    Dan Thibert
    Leominster MA

  4. #4
    Join Date
    Feb 2009
    Location
    Oklahoma City, OK
    Posts
    158
    Aluminum is fairly soft so they might be able to handle it, I don't know. Personally when I drilled my I just used 2 high speed steel bits. The first one was to drill the through hole. The second one, a very large 5/8" bit, was used to create the countersink. Clamping the plate into my drill press, so it wouldn't move, and then just changing the bit on the drill press worked great for me.

  5. #5
    Join Date
    Apr 2007
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    No, not all of SoCal is Los Angeles!
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    9,076
    Quote Originally Posted by Dan Thibert View Post
    What I have is:

    http://www.amazon.com/Jore-ST-05714-...501419&sr=1-26

    I do not think it will be strong enough.
    Yeah, don't use those. The zero flute looks like this:

    Click image for larger version. 

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    So you will be looking for for a countersink with an outer diameter equal to or greater than your required size. I do mine just a bit larger than required so that the screwhead sits a bit below the plate surface.

    I have tried other type of countersinks in aluminum with varying result. The ones in the style shown have worked best for me. Lee Valley's seem to be a reasonable quality. Woodcraft's were poor in quality. Aircraft supply units are high quality and about the same price but don't quite match the common screwhead angles (100* vs. 82*) so they leave a gap around the screwhead and of course, the head does not seat properly to distribute pressure.
    Last edited by glenn bradley; 04-23-2009 at 05:20 PM.
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