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  #1  
Old 08-18-2017, 10:19 PM
RandyAB RandyAB is offline
 
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Location: St Albert, Alberta, Canada
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Default Drilling for CS 4-4 rivets

I'm finishing up the elevator skins and the plans call for CS4-4 blind rivets in the lower skins at the elevator tip in two places. The plans say to final drill 7/64" (which would be between a #30 and #40) which is a bit that I don't have. The trouble is that I'm sizing the rivets in a drill guide and they don't fit in a hole smaller than a #30. Should I just drill a #30 hole and call it a day?
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  #2  
Old 08-18-2017, 11:26 PM
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az_gila az_gila is offline
 
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Exclamation

Your local hardware store should have the fractional drill bits.
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  #3  
Old 08-18-2017, 11:46 PM
rv9builder rv9builder is offline
 
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Location: Irvine, CA
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According to this page from Van?s online catalog, a CS4-4 rivet is 1/8 inch in diameter, so it should fit in a #30 hole. MK-319 rivets look similar to a CS4-4, but they are smaller and 7/64 is the correct drill bit.

http://www.vansaircraft.com/cgi-bin/...product=poprvt

You can see a full-size drawing of both types of rivets in section 5 of the kit instructions.

As Gil mentioned, if you indeed need a 7/64 drill bit, they should be pretty easy to find at Home Depot or a similar store.
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  #4  
Old 08-19-2017, 01:02 AM
RandyAB RandyAB is offline
 
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Location: St Albert, Alberta, Canada
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Quote:
Originally Posted by rv9builder View Post
According to this page from Van’s online catalog, a CS4-4 rivet is 1/8 inch in diameter, so it should fit in a #30 hole. MK-319 rivets look similar to a CS4-4, but they are smaller and 7/64 is the correct drill bit.

http://www.vansaircraft.com/cgi-bin/...product=poprvt

You can see a full-size drawing of both types of rivets in section 5 of the kit instructions.

As Gil mentioned, if you indeed need a 7/64 drill bit, they should be pretty easy to find at Home Depot or a similar store.
Achhhh....my bad. The callout was indeed for an MK-319. Too many hours today. Thanks
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  #5  
Old 08-19-2017, 02:08 AM
rv9builder rv9builder is offline
 
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It?s been a few years since I?ve used MK-319 rivets, but if I remember correctly, first drill to #40 as usual, dimple as usual, then enlarge the dimpled holes to 7/64?. You might want to practice on some scrap before you do this on your elevator. Here's a thread you might find interesting:

http://www.vansairforce.com/communit...d.php?t=128579
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  #6  
Old 08-19-2017, 06:50 AM
rv7charlie rv7charlie is offline
 
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Location: Pocahontas MS
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Cool

Catch this
https://m.harborfreight.com/115-pc-t...set-61543.html
on sale. Plenty good enough for aluminum & mild steel. A handful of hardware store bits will pay for the whole set.
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  #7  
Old 08-19-2017, 08:57 AM
RandyAB RandyAB is offline
 
Join Date: May 2016
Location: St Albert, Alberta, Canada
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Quote:
Originally Posted by rv9builder View Post
It?s been a few years since I?ve used MK-319 rivets, but if I remember correctly, first drill to #40 as usual, dimple as usual, then enlarge the dimpled holes to 7/64?. You might want to practice on some scrap before you do this on your elevator. Here's a thread you might find interesting:

http://www.vansairforce.com/communit...d.php?t=128579
Thanks Mark.
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  #8  
Old 08-19-2017, 08:59 AM
RandyAB RandyAB is offline
 
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Location: St Albert, Alberta, Canada
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Quote:
Originally Posted by rv7charlie View Post
Catch this
https://m.harborfreight.com/115-pc-t...set-61543.html
on sale. Plenty good enough for aluminum & mild steel. A handful of hardware store bits will pay for the whole set.
Alas, no Harbour Freight up here in the Great White North. I'm sure I can find some drill bits at the trading post though.
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  #9  
Old 08-19-2017, 10:28 AM
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Nedimbek Nedimbek is offline
 
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Quote:
Originally Posted by RandyAB View Post
Alas, no Harbour Freight up here in the Great White North. I'm sure I can find some drill bits at the trading post though.
You can buy drill bits from Acklands Grainger, Gregg Distributers or any industrial supply and hardware store in your area.
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  #10  
Old 08-19-2017, 10:32 AM
mturnerb mturnerb is offline
 
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I use a #33 reamer to size up for MK319BS. Works very well, clean hole.
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