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  #1  
Old 01-25-2018, 08:53 PM
DHeal DHeal is offline
 
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Location: Windsor, California
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Default Setting Cherry Max Rivets

FYI -- A new video from Van's regarding the setting of Cherry Max rivets at:

https://www.youtube.com/watch?v=lb9miRllZDo
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  #2  
Old 01-25-2018, 10:52 PM
rv9builder rv9builder is offline
 
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Thanks for posting the link, David! Looks like a great tip. Is there a place on Van's website where videos like this are posted?
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  #3  
Old 01-26-2018, 03:34 AM
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mike newall mike newall is offline
 
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They have a channel

https://www.youtube.com/channel/UCLY...j1kbl33Z5NOshg
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  #4  
Old 01-26-2018, 02:20 PM
rv9builder rv9builder is offline
 
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Quote:
Originally Posted by mike newall View Post
Thanks, Mike!
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  #5  
Old 01-31-2018, 05:40 PM
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philcam philcam is offline
 
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Anyone else at this stage yet? Iím having horrible luck with theses rivets even following the video, only about 1 in 3 rivets are acceptable.
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  #6  
Old 01-31-2018, 05:47 PM
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It helps to use a cherry max puller, standard pop rivet pullers don't work very well on CM.
http://www.aircraftspruce.com/catalo...php?recfer=505
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  #7  
Old 02-01-2018, 07:22 PM
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rolick22 rolick22 is offline
 
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Having a lot of trouble too, even using a cherry max hand puller. I tried the Van way of lubing the stem but no joy. Have had to order more. Thinking of going to find a pneumatic cherry max puller.
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  #8  
Old 02-01-2018, 07:36 PM
DHeal DHeal is offline
 
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Just as a reminder, the Cherry Max rivets look different from standard pull-rivets after installation. See Van's Chapter 5 - Page 05-07 for photos of Cherry Max rivets at: http://www.vansaircraft.com/pdf/revisions/RV-ALL_05.pdf

I know it took me awhile to adjust to the appearance of the shop end of a successfully pulled Cherry Max rivet.
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  #9  
Old 02-02-2018, 06:31 AM
rvsxer rvsxer is offline
 
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Location: Inver Grove Hgts, MN
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Here is a good explanation of how CherryMax Rivets work, and what happens when one is properly set. http://www.cherryaerospace.com/docs/...gs/CA-1011.pdf
Before the CherryMax blind rivet was introduced, The CherryLock rivet was the structural blind rivet of choice. The main drawback to the CherryLock rivet was the requirement for a specialized, expensive puller that would set the mandrel lock ring during the pulling process. This lock ring is important as it positively locks the mandrel in place and allows the rivet to develop design strength. The CherryMax rivet uses a washer ("anvil") to set the lock ring, so a standard "pop rivet" puller can usually be used to set them. This is one reason why CherryMax rivets are approved on Standard Category aircraft size-for-size with solid rivets.
To easily remove a CherryMax rivet, the lock ring should be ground away, with a pencil grinder or a high-speed grinder and cutoff wheel. The (usually steel) mandrel can be driven out and the rivet head drilled as with a solid rivet.
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  #10  
Old 01-26-2020, 02:51 PM
AaronG AaronG is offline
 
Join Date: Sep 2009
Location: Hartford, CT
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Thought I would share my experience setting the CR3213-4-08 cherry max rivets on the RV12is fueslage spar assembly. For starters, I have set many cherrymax rivets over the years with zero issues. I have the cherrymax hand tool, and lubricated the rivets like in the video. Despite all of this, I was getting maybe 1 in 4 rivets to set properly. Finally walked away and decided to order a new batch of rivets. Not cheap, but was able to get them for $1 each when ordering 50 through Aircraft Tool Supply.

Rivets came today. Not a single failure with the new batch, setting 30 rivets. What a difference, much to my relief. Not sure why a different batch mattered, but it did. Visually, I could not tell the difference between the two. So if you are following the video and still having issues, try ordering another batch from a different source.

One other comment, for those who are not familiar with a properly set cherrymax, make sure you learn and check these rivets. They need to be properly pulled and locked to get full strength.
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