How to Prevent Router Bit Slip with Silicone Caulk and Scrap Melamine
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Router bits should not bottom out in the arbor shaft of a router, because it can compromise tightening them properly in the collet.

Silicone spacers A little dried silicon on a non-stick pad makes perfect slivers to use as spacers when you're routing.

I used to follow the usual convention of bottoming the bit out, then pulling it back up 1/16" to 1/8" or so. But I was never sure if the bit was slipping back down when I tightened the collet. Here’s a foolproof solution: Squeeze out a 1/4" bead of silicone caulk onto a scrap of melamine, plastic laminate or other non-stick surface and let it fully cure. Then cut it into 1/8" slivers to use as spacers under your router bit. Drop one into the collet hole, and you’ll never bottom out the bit again.

posted on December 1, 2010 by Woodworker's Journal
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One thought on “How to Prevent Router Bit Slip with Silicone Caulk and Scrap Melamine”

  • TLM80209

    I have an O-ring on the shaft of each of my bits. Then I have complete adjustablility of how deep I insert the bit in to the collet.

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