Router bit climbs while cutting

mardi 19 janvier 2016

I have a big Triton 2 hp router under my router table for years now, and the internal springs are removed.

Today I was cutting dovetails on the Gifkins jig, using the Gifkins dovetail cutter bit and the Gifkins 1/4" adapter for the router 1/2" collet. After cutting 10 or so tails during the morning on various test pieces, I finally started work on my huon pine dovetail box.

The first end of the first side went beautifully, but as the other end was being cut there were some funny noises, and there was some difficulty cutting the last tail.

Removing the workpiece, I find that the bit has climbed higher out of the table with each tail cut, so that by the end of the last tail being cut, the bearing on the cutter was jamming against the workpiece and would not rise any further.

Looking at the attached photos, I have marked the attached photo showing the lower end of the board where the cuts were started. You can see the gradual rise in height of the cut compared to a line drawn at right angles across the board.

The bit could not be moved by hand, and the 1/2" collet was tight, needing a spanner to undo the collet to remove the adapter and bit. There was no dust or dirt inside the 1/2" collet.

Has anyone ever come across this problem before? I suspect a problem with either the Triton router collet moving up during operation, or the adapter moving up inside the collet during operation i.e., not tightened. Although it did need a large spanner to loosen it

Can anyone please suggest a possible solution?


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Attached Images


Router bit climbs while cutting

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