Ditto ... The only time in years of using a router has a bit ever climbed on
me and that was with a 7518 and a 1/4" collet, and recently there have been
other reports here of bits climbing in the PC 7518 when using a 1/4" collet.
I know how to properly chuck up a router bit, so in my case it was neither
technique, nor lack of initial tightening.
I have observed that a 7518 runs hotter than any other modern router I've
used. I have noticed this with two other 7518's besides my own, and they run
particularly hot when used in a router table for any length of time.
I am surmising that the smaller collet and bit, with less mass and closer to
the action, is expanding at a different rate than the threaded arbor and
therefore loosening under the heat built up by the 7518 during prolonged
With nothing else to go on, and when running a 1/4" collet in the 7518 in a
router table, I now let it run for a few minutes until the tool heats up,
preferably under a load on some scrap, then re-tighten the collet before
setting your depth of cut and fence.
... and, as always, make sure you don't 'bottom' the bit in the collet
I can't guarantee this will solve the problem, but it seems to be a prudent
step to take as it was not an uncommon one years ago on older tailed tools.
Last update: 2/13/04
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