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Dimpling problem
I'm trying to learn how to build by building the RV training kit and I ran into an odd problem I can't explain. I'm building the first piece, where you drill 12 #40 holes, dimple and then rivet two pieces of sheet together.
I'm using the Cleaveland tools dimple die sets and C frame. After I dimpled the holes I was surprised to see my 3/32" cleco's would not stay in the holes, which had somehow enlarged. I'm at a loss to understand what I did wrong. I'm positive I used the correct dies and drill, as the pieces were cleco'd together before I dimpled. Is it possible to over-dimple to the point where the holes get too big? I'm so confused. Thanks, |
possibilities
Once dimpled, the holes do enlarge just slightly and sometimes if the cleco is installed from the side that bent inward (the inward side) it won't hold real well. Make sure the cleco comes from the outside skin towards the inside skin.
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Also, the clecos from different manufacturer are slightly different. I bought clecos in different places, they are all stored in the same place. Some of them lose their "shinyness" after a while others still look like new. The shiny ones grips a dimpled hole with no problem, not so much for the others.
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Clekos
Check the brand. Wedgelock clekos are best. The center pin is thicker. Clekolock will pop out of a dimpled hole.
Pretty hard to over dimple. Even with a C-frame, it takes two serious whacks to get a nice crisp dimple. |
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I ran a test where I used the C frame to dimple another hole and then used the same dimple dies in the pneumatic squeezer. The squeezer dimples and the ones from the C frame fell out.
It sure looks like I'm somehow over-dimpling and enlarging the holes. Guess I'll contact Cleaveland and ask them what I'm doing wrong. I edited this post after I went back out and the squeezer cleco fell out :-( |
Can?t over dimple
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I still think the most likely problem is the wrong size die, but since you said that was checked I didn?t go down that path |
Hole size after dimpling?
Can you measure the size of the hole after it has been dimpled? Easiest way to do this is with a larger drill bit that just fits. That may give us a clue to help figure out where things are going wrong. Also, have you got a different 3/32 dimple die that you can try?
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Here?s a thought....(not that I have ever this!) ...but make sure you are using a #40 dimple and not a #30.... It happens and like I said...not that I have ever done that before, 😇
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