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08-29-2019, 09:45 AM
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Join Date: Jul 2012
Location: n. wi
Posts: 774
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drilling out pop rivets
put a stop on the drill bit so only 1/4'' of the bit is exposed. when outcomes aren't so good drilling out pop rivets often it is caused by the longer bit ''wallowing'' out the hole either as it drills thru or as you pull it out of the hole.
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Bob Noffs
n. wi.
dakota hawk/jab 3300 built and flying. sold 6/18.getting serious about the 12. in the hangar now as of 10/15/19
RV-12 kit as of 9/13
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08-29-2019, 09:47 AM
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Join Date: Mar 2017
Location: Birmingham, Alabama
Posts: 1,635
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Wasn't sure if you were asking or telling but this does the job - https://www.aircraftspruce.com/catal...driv-03368.php
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RV-14A #140376
N196 (Flying)
2019 Bronze Lindy
Last edited by bkervaski : 08-29-2019 at 11:38 AM.
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08-29-2019, 11:29 AM
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Join Date: Jan 2007
Location: Battleground
Posts: 4,348
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You?re drilling too deep. Drill only to a point you can pop the head off. Then gently punch the remainder out.
Sometimes the stem breaks off flush with the head or not very deep when the rivet is set. You can gently punch the stem down if you have a solid enough structure. Then drill off the head and punch out the body.
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Smart People do Stupid things all the time. I know, I've seen me do'em.
RV6 - Builder/Flying
Bucker Jungmann
Fiat G.46 -(restoration in progress, if I have enough life left in me)
RV1 - Proud Pilot.
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08-29-2019, 11:35 AM
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Join Date: Dec 2009
Location: Montreal
Posts: 1,456
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Quote:
Originally Posted by bkervaski
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That is for dome head bucked rivets. Are you saying it works for pop rivets too?
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Scott Black
Old school simple VFR RV 4, O-320, wood prop, MGL iEfis Lite
VAF dues 2020
Instagram @sblack2154
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08-29-2019, 11:38 AM
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Join Date: Mar 2017
Location: Birmingham, Alabama
Posts: 1,635
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Quote:
Originally Posted by sblack
That is for dome head bucked rivets. Are you saying it works for pop rivets too?
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Oops! Looks like this is the kit I was referring to:
https://www.aircraftspruce.com/catal...driv-03368.php
Sorry for the confusion, updated the link.
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RV-14A #140376
N196 (Flying)
2019 Bronze Lindy
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08-29-2019, 12:14 PM
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Join Date: Jan 2005
Location: SC
Posts: 12,887
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I always punch the stem out first and then drill the rivet out with a slightly undersized bit.
If the stem is in and the drill hits it, it will wonder. If the stem is not there, you shouldn't have any issues.
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Bill R.
RV-9 (Yes, it's a dragon tail)
O-360 w/ dual P-mags
Build the plane you want, not the plane others want you to build!
SC86 - Easley, SC
www.repucci.com/bill/baf.html
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08-29-2019, 12:43 PM
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Join Date: Aug 2010
Location: Irvine, CA
Posts: 416
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I use a center punch to drive the mandrel, but only to where it's low enough that the drill won't touch it, then drill just to pop off the head. Use the centerpunch again to push the mandrel out the bottom. Too easy.
Always use a backup block on the mandrel side to prevent distorting the workpiece.
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John Halcrow
Tustin, CA
RV-12 120682
Emp/TC done; Wings done; Fuse kit done
"History teaches us that men and nations behave wisely once they have exhausted all other alternatives." --Abba Eban
Paid up until Aug 2021
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08-29-2019, 02:27 PM
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Join Date: Jan 2005
Location: Irvine, CA
Posts: 872
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Quote:
Originally Posted by XOverZero
I use a center punch to drive the mandrel, but only to where it's low enough that the drill won't touch it, then drill just to pop off the head. Use the centerpunch again to push the mandrel out the bottom. Too easy.
Always use a backup block on the mandrel side to prevent distorting the workpiece.
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John,
Did you find a spring-loaded center punch narrow enough to fit in the hole in the rivet where the stem is, or did you have to modify a punch to get it to work?
Thanks,
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Mark
RV-12iS Fuselage
RV-9A Project: Sold
VAF donation made for 2020
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08-29-2019, 07:48 PM
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Join Date: Aug 2010
Location: Irvine, CA
Posts: 416
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No mod needed - works a treat out of the box. Use the lighter duty 'aluminum' punch. I have a ?" diameter blind hole drilled in a UHMW backup block to catch the mandrel.
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John Halcrow
Tustin, CA
RV-12 120682
Emp/TC done; Wings done; Fuse kit done
"History teaches us that men and nations behave wisely once they have exhausted all other alternatives." --Abba Eban
Paid up until Aug 2021
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08-29-2019, 11:42 PM
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Join Date: Jan 2005
Location: Irvine, CA
Posts: 872
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Thanks, John. I'll have to look around for a smaller one. The diameter of the one I have is too big and can't reach the stem inside the hole.
__________________
Mark
RV-12iS Fuselage
RV-9A Project: Sold
VAF donation made for 2020
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