Triton Router: 1/4" bit came through the top of the board!!!!

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Forum topic by Luke2220 posted 02-02-2015 01:37 AM 1043 views 0 times favorited 10 replies Add to Favorites Watch
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23 posts in 965 days

02-02-2015 01:37 AM

Topic tags/keywords: router triton bit top board

I was using a 1/4” spiral bit to cut some dados for drawer bottoms yesterday when the bit suddenly came through the top of the board!!!! I immediately stopped what I was doing, checked to make sure the bit was tightened down and tried it again. After two more boards the bit suddenly came up through the board again!!!

I immediately stopped again and proceeded to troubleshoot my router. The router is not physically moving up. Apparently the bit is loosening up and coming up through the wood at me!!! When I cleaned out the dado to look at the cut pattern, the cut is the same height and then suddenly the bit goes straight up!!!!!!!!

In the Marines we would have called this a whiskey-tango-foxtrot problem. Has anybody experienced this and what did you do to fix it? I’ve already contacted Triton, but that was last night. It might be tomorrow before I get a response if I get one at all.

I hope its not time to circular file the router and get a new one.

Thanks for the help.

10 replies so far

View JAAune's profile


1614 posts in 1737 days

#1 posted 02-02-2015 01:49 AM

My first thought is a bad collet. I’m not sure how to test it to find out if that’s the case.

If the collet is loose, the spiral bit will accentuate the problem due to the pulling force it generates. I’ve seen how an excessively deep cut on a CNC machine while using a up-cut spiral can force the z-axis position to drop over time.

-- See my work at and

View firefighterontheside's profile


13074 posts in 1277 days

#2 posted 02-02-2015 01:57 AM

I had this problem with an up spiral 1/4 bit on my triton. Scared the crap out of me. I chalked it up to the combination of the up spiral, the oak I was cutting and the bit of vibration it as doing. I’ve never had the problem again. I don’t put my hands over that hit anymore I can tell you.

-- Bill M. "People change, walnut doesn't" by Gene.

View DIYaholic's profile


19138 posts in 2096 days

#3 posted 02-02-2015 02:10 AM

A 1/4” collet/shaft will have 1/2 the surface area, compared to a 1/2” collet/shaft.
That correlates to half the “grip”, to keep the bit secure….

Sounds like another reason to go with 1/2” bits, whenever possible!!!

-- Randy-- I may not be good...but I am slow! If good things come to those who wait.... Why is procrastination a bad thing?

View hotbyte's profile


825 posts in 2396 days

#4 posted 02-02-2015 02:14 AM

Had similar thing happen routing slots in a board the other week. I had drilled starter holes and was routing slot on router table. So, my bit was already sticking up through board but I noticed it coming up higher. I took some 400 grit wet/dry paper to the bit shank and did not have any other problem. Don’t know if the light sanding of shank or re-positioning bit was the difference.

View firefighterontheside's profile


13074 posts in 1277 days

#5 posted 02-02-2015 02:17 AM

I think another thing is that the 1/4” up spiral is 100% carbide and probably doesn’t “stick” to the collet like steel.

-- Bill M. "People change, walnut doesn't" by Gene.

View johnstoneb's profile


2104 posts in 1593 days

#6 posted 02-02-2015 02:22 AM

Clean your collet and the shank on the bit. I’ve had this happen with regular bits and it has been dirt in the collet or dirt or oil on the shank of the bit. If it is a new bit clean the bit the perservative off the shank. Lacquer thinner works for me.

-- Bruce, Boise, ID

View Luke2220's profile


23 posts in 965 days

#7 posted 02-02-2015 03:29 AM

I’ve gotten in the habit of cleaning my router bits and brushing them down with oil before putting them up after I use them. Maybe I didn’t clean up the bit as good as I thought I did. I’ll make sure everything is cleaned out and give it another shot.

View bondogaposis's profile


3969 posts in 1772 days

#8 posted 02-02-2015 03:42 AM

I’ve gotten in the habit of cleaning my router bits and brushing them down with oil

I wouldn’t put oil on them, especially on a upcut bit.

-- Bondo Gaposis

View gfadvm's profile


14929 posts in 2111 days

#9 posted 02-02-2015 04:18 AM

Yep, I have had the same experience. I really suspected the spiral bit shaft must have been a few thou undersized. I still use that bit but feel that I have to badly overtighten the collet. Downcut bits don’t seem to have this problem like upcuts do. Not that it is relevant but the problem bit was a Grizzly upcut spiral 1/4” carbide.

-- " I'll try to be nicer, if you'll try to be smarter" gfadvm

View Crank50's profile


170 posts in 997 days

#10 posted 02-02-2015 06:22 AM

The key to this problem here is the full carbide bit.
The collet can’t get a god grip because the bit is harder than the collet.
A diamond coated collet would solve the problem.
Automotive rubbing compound might help if you don’t happen to have any diamond coated collets.

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