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-   -   Small Gotcha and question (https://vansairforce.net/community/showthread.php?t=120892)

Aluminum 08-11-2018 01:27 AM

Quote:

Originally Posted by Ron B. (Post 946875)
Rivets were definitely not set properly. Discovered my mistake. The first gun I tried, the smaller tip hole would not fit so I used the next size up. It must have been too large. I tried another gun this morning that had a hole that was tight , but the stem still slid thru. All rivets set properly now.
Ron

Ran into the same issue with the large CherryMax rivets and HF puller. I was able to finish setting the rivets using a squeezer--the steel mandrel makes a loud pop once it's driven in properly (that's the second pop that was missing when using puller) and ends up flush with the top of the rivet.

Ron B. 08-11-2018 08:58 AM

What do you mean by a squeezer. As in a solid rivet squeezer?

Aluminum 08-11-2018 09:40 AM

Quote:

Originally Posted by Ron B. (Post 1280021)
What do you mean by a squeezer. As in a solid rivet squeezer?

Affirmative.

mturnerb 08-11-2018 10:05 AM

Quote:

Originally Posted by Aluminum (Post 1279997)
Ran into the same issue with the large CherryMax rivets and HF puller. I was able to finish setting the rivets using a squeezer--the steel mandrel makes a loud pop once it's driven in properly (that's the second pop that was missing when using puller) and ends up flush with the top of the rivet.

Vans has a video describing how to lubricate the mandrel/stem on CherryMax rivets to address this issue (old rivets are the cause IIRC): https://www.youtube.com/watch?v=lb9miRllZDo

rvbuilder2002 08-11-2018 11:59 AM

Quote:

Originally Posted by mturnerb (Post 1280032)
Vans has a video describing how to lubricate the mandrel/stem on CherryMax rivets to address this issue (old rivets are the cause IIRC): https://www.youtube.com/watch?v=lb9miRllZDo

There are numerous causes of the rivet not setting properly.

Another one is alignment. If the tool is tilted to the side slightly, it tends to add additional tension load on the river stem and can cause it to fracture prematurely.

Aluminum 08-11-2018 02:42 PM

Quote:

Originally Posted by mturnerb (Post 1280032)
Vans has a video describing how to lubricate the mandrel/stem on CherryMax rivets to address this issue (old rivets are the cause IIRC): https://www.youtube.com/watch?v=lb9miRllZDo

My kit is a few months old, and the -5 rivets don't look any more aged than the -4 ones that set perfectly every time, so I doubt rivet age has anything to do with it. I am using an "unapproved" puller so Ron's explanation fits. There are only a few of these big CherryMax rivets in the entire kit, so touch-up with a squeezer is much more economical than getting a special puller, making a mess when drilling out, etc. :D

Thanks for the video pointer, I'll try the lubricant trick next time.


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