Broken #40 Countersink Cutter

[TJ_Slice]

Call me crazy, but I decided to stick with the kit and do rivnuts for the floor. While countersinking some of the holes, I broke off the nipple end of my #40 countersink cutter.

Has anyone else had this happen? It happened after I stopped countersinking, and wasn't paying attention when removing it from the hole. I must have torqued it a bit.

If it is something common, I'll order a couple of replacements, instead of just one.

[jaredyates]

It is really easy to break a drill bit in the smaller sizes. I have not broken the pilot off of a countersink yet. Are you using a cage on the countersink or just freehanding it?

[TJ_Slice]

I am using a cage. I'm sure the steel tabs are not easy on the cutters.

[David Swartzendruber]

I'm trying to think of why you would need to do any countersinking when installing a rivnut. Did you mean to say nutplate? I didn't realize you had to be crazy to install nutplates for the floorboards. That's what I did.