Author Topic: Router bit for dado  (Read 2688 times)

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Offline mastercabman

  • Posts: 1854
  • NORFOLK,VA
Router bit for dado
« on: April 07, 2012, 05:22 PM »
What router bit do you use to make dado for 1/4" mdf core melamine?
I have been using a down cut spiral bit(1/4")but i need to replace it.I've had it for a long time and it's getting dull.
Also,i'm having a hard time inserting the 1/4" panel into the groove.Should i get a step up in size?
I don't understand!?! I keep cutting it,and it's still too short!

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Offline Tim Raleigh

  • Posts: 3569
    • Oakville Cabinetry
Re: Router bit for dado
« Reply #1 on: April 07, 2012, 06:42 PM »
Vortex makes an 8mm with an 8mm shank which might be better.
I have found the straight bits give me as clean a cut as the down cut bits with less heat and chance of breaking off...but that's 'cause I would want to plunge a down cut which is a no no.
Tim

Offline mastercabman

  • Posts: 1854
  • NORFOLK,VA
Re: Router bit for dado
« Reply #2 on: April 07, 2012, 07:21 PM »
Is the 8mm not too big for 1/4" mdf melamine?
I don't understand!?! I keep cutting it,and it's still too short!

Offline Tim Raleigh

  • Posts: 3569
    • Oakville Cabinetry
Re: Router bit for dado
« Reply #3 on: April 08, 2012, 08:24 AM »
Is the 8mm not too big for 1/4" mdf melamine?

1/4" = approx. 6.5mm. With an 8mm bit you have 1.5mm play. Not a lot if the board is really thicker than 1/4".  If you are finding the 1/4" bit you are using is too tight, caliper your board and your bit and check the thickness. The board may be thicker by the coating amount which makes it slightly thicker than 1/4".

Offline mastercabman

  • Posts: 1854
  • NORFOLK,VA
Re: Router bit for dado
« Reply #4 on: April 08, 2012, 09:37 AM »
Thanks Tim,i will look into it.
I still need to get a replacement 1/4" for other application too.
I don't understand!?! I keep cutting it,and it's still too short!