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11-02-2019, 05:56 PM
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Join Date: Apr 2019
Location: Austin
Posts: 8
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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,
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11-02-2019, 06:08 PM
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Join Date: Dec 2017
Location: Lithia, FL
Posts: 217
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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.
Last edited by mulde35d : 11-02-2019 at 06:11 PM.
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11-02-2019, 06:17 PM
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Join Date: Dec 2012
Location: Katy, TX
Posts: 233
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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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11-02-2019, 06:39 PM
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Join Date: Oct 2005
Location: Estes Park, CO
Posts: 3,947
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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.
__________________
Larry Larson
Estes Park, CO
http://wirejockrv7a.blogspot.com
wirejock at yahoo dot com
Donated 12/03/2019, plus a little extra.
RV-7A #73391, N511RV reserved (2,000+ hours)
HS SB, empennage, tanks, wings, fuse, working finishing kit
Disclaimer
I cannot be, nor will I be, held responsible if you try to do the same things I do and it does not work and/or causes you loss, injury, or even death in the process.
Last edited by wirejock : 11-02-2019 at 06:41 PM.
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11-02-2019, 09:17 PM
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Join Date: Jan 2005
Location: 57AZ - NW Tucson area
Posts: 10,011
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Quote:
Originally Posted by wirejock
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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But the 'fatter' center pin makes it harder to insert in the un-drilled undersized holes in a QB kit....
__________________
Gil Alexander
EAA Technical Counselor, Airframe Mechanic
Half completed RV-10 QB purchased
RV-6A N61GX - finally flying
Grumman Tiger N12GA - flying
La Cholla Airpark (57AZ) Tucson AZ
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11-02-2019, 09:50 PM
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Join Date: Mar 2005
Location: DVT Phoenix
Posts: 1,187
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Quote:
Originally Posted by wirejock
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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Wirejock nailed it again. I have a large can of unusable Clekolock cellos that I keep well out of reach! :-) They do work well if used when match drilling but if you mix them up they will drive you crazy
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Larry
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11-02-2019, 10:27 PM
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Join Date: Apr 2019
Location: Austin
Posts: 8
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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 :-(
Last edited by danielweberdlc : 11-03-2019 at 12:45 AM.
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11-03-2019, 03:22 AM
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Join Date: Dec 2017
Location: Lithia, FL
Posts: 217
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Can?t over dimple
Quote:
Originally Posted by danielweberdlc
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 :-(
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Take it from the guy who physically bent the squeezer ram while dimpling, you can?t ?over dimple? a hole. You can bend the sheet metal if not aligned properly and you can easily under dimple the hole. But I am not sure that any of us have the leverage to over dimple the hole with this equipment.
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
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11-03-2019, 06:39 AM
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Join Date: Aug 2019
Location: Western Australia
Posts: 333
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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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Paul vS (yes I'm also a Van)
Building RV-6A #22320 O-320 FP. Wings and tail complete, working on fuselage
Flying my low-n-slow Aeroprakt A-22 and the aero club's RV-9A while I build
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11-03-2019, 08:17 AM
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Join Date: Feb 2005
Location: Central Alabama
Posts: 303
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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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Hwood 
N469SH / "Crazy Woman" (sold)
Working on Another -8
Exempt but paid
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