Drawer Locking Bit

[boxers]

I have a Triton mounted in a triton router table and have been practising with my Drawer locking bit (Infinity) Not having much success. My biggest problem is the bit rises about a 1/16" after a couple of passes. I lock the router but to no avail. Any ideas. I think the raising of the bit is the root of my problems.:confused:

[echnidna]

Is the bit coming out of the router chuck?
or is the router depth setting altering?

[Gumby]

If the bit is moving in the collet, that is cause for concern and potentially very dangerous. Are you sure you have it tightened enough ? I haven't had any such probs in my Triton router except when I used a 1/4 bit with the reducer in place and forgot to tighten it properly. :eek:

Is it the table top moving ? Maybe that's the problem. Are you pressing down on it more in some areas and moving those plastic rings down a bit as you do it.

There's an article on lock mitre bits in one of our Triton Club newsletters. Check the Newsletter index and you'll find it.
www.tritonwoodworkers.org.au

[boxers]

:o :o After reading your posts I went and had another look at the problem and the scary thing is the bit was coming out of the router jaw. It had moved out a good 2 cm. Scary stuff. I have been tightening as usual but This is the first time I have used such a big bit. I tried again and tightened more strongly.This time no problems. I will leave this thread on just to highlight the dangers involved although I will look like a goose.

[DPB]

:o :o After reading your posts I went and had another look at the problem and the scary thing is the bit was coming out of the router jaw. It had moved out a good 2 cm. Scary stuff. I have been tightening as usual but This is the first time I have used such a big bit. I tried again and tightened more strongly.This time no problems. I will leave this thread on just to highlight the dangers involved although I will look like a goose.

Also make sure that you have slowed the machine down considerably - perhaps to its slowest speed. The RPM at the outside circumference of the drawer locking bit is substantially higher that on a smaller bit - perhaps the sheer mass involved at a high speed is more that the collet can handle.

[Auld Bassoon]

Agree with Don on router speed. I was recently making up some tongue and groove boards for a pie cabinet, and was using a matched pair of Infinity router bits designed for the purpose. It was only when I heard the router whistle up to full speed that I remembered that I needed to throttle its speed right back.

As to a bit (especially a large one) in a loose collet: doesn't bear thinking about...

[Skew ChiDAMN!!]

...and check the shank of the bit for any burrs, etc.

I've a large roundover bit that kept levitating in the same way. I didn't have any problems with other bits tightened to the same degree, just this one. On close inspection there was a small ding in the shank, something I wouldn't have ordinarily thought twice about. I think the edges were raised just enough that it'd grip them and "feel" tight but there was only minimal shank/collet contact.

I touched the ding up with a diamond lap and now the problem seems to have gone. [fingers Xed]