Note: This is about a North TJ-067 just before Mill City took on U.S. distribution.

Hi Everyone:

I noticed something shiny before it went into my grinder. Then I discovered that there's an inherent hazard in my North TJ-067 cooling tray. The arms have thick Teflon strips attached by 10mm hex key screws with nuts fastened into the Teflon. The folks at North probably thought the Teflon is good to tighten against because it creates a snug fit -- except that plastic migrates over time. One of those nuts loosened and almost ruined my Ditting burrs! I've just added threadlocker to those nuts and will keep an eye on them from now on. I've cross-posted this to the North Roaster forum to make sure the word gets out!

Here's a close-up



Fastener with hex key inserted

They should probably just use Nylocks instead of loctite so it's obvious they need to be locked.

Ira

Thanks, Steve. I noted my early version above. What's the other side of your fix look like?

They take a 10mm wrench, so yes, that's M6.

Nylocks are really only useful if the bolt extends at least one thread past the nut. You need to use a longer bolt.

Ira

Thanks, Ira. I've applied thread locker and have nylocks on order. The threads extend well beyond the original nuts. I'll see if they fit. But you're correct about the photo shown by Steve. The threads don't extend beyond the bolt there.