UM Tikka bolt handles

[mxgsfmdpx]

Here's an update on using Loctite 480.

TLDR: I didn't move fast enough, and now have a ball sticking off the end of the exposed threaded area. If I can't fix, then I've possibly just destroyed a UM bolt handle!

Long version: Loctite 480 (and 380) state 90 seconds:

View attachment 791644

90 seconds is not the full story, and easy to use ... not so much. Here's what happened: I degreased UM bolt thread and inside knob (a fair amount of grease/oil, so don't skip this step!).

Applied 480, and went to assemble. Ball caught strongly on first quarter turn that I thought it must have been cross-threaded. I quickly removed and reattempted. Same outcome. Removed and reattempted - when I felt it catch, I knew it wasn't cross-threaded, so started screwing on with as much hand strength possible. Ball fully caught in perhaps only one turn, and was locked in place. Wrench and pliers couldn't remove.

I had a second handle and knob. This time, degreased and tested dry assembly a few times, making sure no cross-threading and perfect line-up. Applied Loctite 480. Went to screw on an the slight catch again - then screwed it on as fast as I could. Halfway along the short threaded section, this became hard. Had to use all my hand strength to get it to the end.

Sound wacky? I thought so too, so dug up the full data sheet - here's the answers:

View attachment 791648

View attachment 791649

My temp was about 22 deg C and RH was about 60-65%.

My guess is the first balls-up was about 20-30 seconds, and the one that only just worked was about 5-10 seconds.

Lesson - if you're going to use Loctite 480 (and possibly 380), work fast folks! Because this is a bit of an understatement:

View attachment 791654

I have an extra ball and handle if you can’t get yours resolved. PM me.

 

[Marbles]

I have an extra ball and handle if you can’t get yours resolved. PM me.

Has you wife approved that offer?

 

[Formidilosus]

Here's an update on using Loctite 480.

TLDR: I didn't move fast enough, and now have a ball sticking off the end of the exposed threaded area. If I can't fix, then I've possibly just destroyed a UM bolt handle!

Long version: Loctite 480 (and 380) state 90 seconds:

View attachment 791644

90 seconds is not the full story, and easy to use ... not so much. Here's what happened: I degreased UM bolt thread and inside knob (a fair amount of grease/oil, so don't skip this step!).

Applied 480, and went to assemble. Ball caught strongly on first quarter turn that I thought it must have been cross-threaded. I quickly removed and reattempted. Same outcome. Removed and reattempted - when I felt it catch, I knew it wasn't cross-threaded, so started screwing on with as much hand strength possible. Ball fully caught in perhaps only one turn, and was locked in place. Wrench and pliers couldn't remove.

I had a second handle and knob. This time, degreased and tested dry assembly a few times, making sure no cross-threading and perfect line-up. Applied Loctite 480. Went to screw on an the slight catch again - then screwed it on as fast as I could. Halfway along the short threaded section, this became hard. Had to use all my hand strength to get it to the end.

Sound wacky? I thought so too, so dug up the full data sheet - here's the answers:

View attachment 791648

View attachment 791649

My temp was about 22 deg C and RH was about 60-65%.

My guess is the first balls-up was about 20-30 seconds, and the one that only just worked was about 5-10 seconds.

Lesson - if you're going to use Loctite 480 (and possibly 380), work fast folks! Because this is a bit of an understatement:

View attachment 791654

A propane torch will release it.


And yes, you need to be quick.