Ducati Monster Forum

Moto Board => Tech => Topic started by: angler on November 08, 2009, 01:07:29 PM

Title: cross-threaded hole
Post by: angler on November 08, 2009, 01:07:29 PM
I cross threaded a hole in the lower triple this afternoon.  It is one of the holes that holds the headlight bracket.

Would it be better to fix the problem with a thread chaser or VERY carefully with a tap?

Thanks
Title: Re: cross-threaded hole
Post by: cduarte on November 08, 2009, 01:20:05 PM
I'd use a tap.
Title: Re: cross-threaded hole
Post by: TAftonomos on November 08, 2009, 02:15:50 PM
Go to a M6 sized thread/tap.   [thumbsup]
Title: Re: cross-threaded hole
Post by: Popeye the Sailor on November 08, 2009, 02:48:41 PM
Quote from: cduarte on November 08, 2009, 01:20:05 PM
I'd use a tap.

+1
Title: Re: cross-threaded hole
Post by: angler on November 09, 2009, 04:45:49 AM
What pitch?  M5x.8 and M6x1.0?
Title: Re: cross-threaded hole
Post by: Speeddog on November 09, 2009, 08:10:23 AM
It's an M6x1.0.
Title: Re: cross-threaded hole
Post by: dlearl476 on November 09, 2009, 08:14:10 AM
In a non-critical application like that, I've had good luck with lock-tite thread repair.   Use a tap and clean up the threads, blow it out with solvent and compressed air, then use the kit.  DON'T forget the release agent on the bolt.
Title: Re: cross-threaded hole
Post by: Porsche Monkey on November 09, 2009, 08:14:22 AM
Thread chasers are worthless when you have a good tap set.
Title: Re: cross-threaded hole
Post by: Langanobob on November 09, 2009, 03:12:27 PM
Just be real careful when using a tap.  Get it perfectly straight and make sure you're engaged in the original and correct threads.  Taps cut aluminum pretty easy and you can do some damage with them in already cross-threaded holes.  The tap should turn real easy.  If it has much resistance it means you're probably cutting threads where threads don't belong, i.e., cutting away the high points of the original threads.

The odds of doing damage are probably less with a thread chaser but I've never used one myself so can't comment.  I have done damage with taps so I can comment on them  :)
Title: Re: cross-threaded hole
Post by: NAKID on November 09, 2009, 04:10:42 PM
I hate those holes. They never seem to line up...
Title: Re: cross-threaded hole
Post by: angler on November 10, 2009, 03:55:32 AM
Quote from: Mr. Exact on November 09, 2009, 04:10:42 PM
I hate those holes. They never seem to line up...

You're telling me.  I knew how soft that aluminum was and checked alignment repeatedly and still cross threaded it, with just fingers no less.....
Title: Re: cross-threaded hole
Post by: angler on November 10, 2009, 03:23:55 PM
Thanks all.  I bought a $5 tap at Sears and carefully cleaned up the threads. Triple checked the alignment this time and everything went together fine.
Title: Re: cross-threaded hole
Post by: woodyracing on November 10, 2009, 04:41:40 PM
ya'll call it cross threading, I call it redneck loctite!