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I am using a Festool router with a 1-1/2 Amana straight bit to create breadboard tenons on a table top. This appears to be generating a lot of static electricity -- evidenced by the jolts I receive if my fingers get too close to the metal parts of the body.

Any thoughts on how to combat this? Aside from wrapping copper wire around the router and connecting it to an electrical ground?

  • Are you using a festool hose and dust extractor? This is essential to reduce/eliminate the static – Steven Sep 3 '17 at 15:37
  • Yes. CT26E and OF1400EQ. It has been better today. Humidity is a bit higher which might be helping. – James Sep 3 '17 at 16:23
  • Related, insofar as this answer has comments talking about Festool dust extraction and how it mitigates static build-up only for Festool tools: woodworking.stackexchange.com/a/4334/5572 – jdv Jul 12 at 15:53
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Most equipment these days is double insulated. Some countries/states explicitly prohibit you earthing anything on them - it is illegal, and in some failure situations, dangerous.

Safest way would be to wear gloves, and put the router on a metal shelf in between cuts :-)

  • "Earthing" through a high resistance (like 1MΩ) will eliminate static, but is not an electrocution risk (because it can only conduct 240μA at 240V). – Martin Bonner supports Monica Jul 12 at 12:14
  • @MartinBonner while true in principle, many double-insulated items will have a sticker that reads "NO EARTHING" and they will be strict about this for liability or warranty purposes. – jdv Jul 12 at 13:55
  • @jdv : The reason I put "earthing" in quotes, is because connecting an anti-static device is not earthing. – Martin Bonner supports Monica Jul 12 at 14:53
  • @MartinBonner I see what you are saying, which is why I, too, used specific language "in principle". But lawyers are unlikely to accept these subtleties. If warranty or liability is important, then a warranty sticker is a warranty sticker. This all being said, Festool integrates static dissipation into their dust removal systems that can be fitted to their tools. Again, this is where they might not accept any homemade anti-static system in a warranty or liability situation. – jdv Jul 12 at 14:59

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