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  #1  
Old 10-26-2021, 02:45 PM
peter houpt peter houpt is offline
 
Join Date: May 2021
Location: zwolle , the Netherlands
Posts: 7
Default drill bits for plexiglass

for the canopy you need a no 30 and 27 plexiglass drill bit.

the no 30 can be ordered through Spruce. But I can not find a no 27. Is the diameter very critical?
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  #2  
Old 10-26-2021, 02:56 PM
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Mike S Mike S is offline
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https://www.fabricationtoolsandmater...om/contact.htm

Good source of plastic tools. They also have a great cleaner for the windscreen.
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  #3  
Old 10-26-2021, 03:30 PM
clam clam is offline
 
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Location: Lakeland, TN
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Not sure on the diameter question on the RV-12, but for the -8 I drilled the holes oversized a bit so the canopy can "float" (expand/contract) relative to the fasteners. No cracks in 300 hours.

For the drill bits ... file the "shoulders" off a standard bit and you now have a plexi-bit.

Only drill the plexi when it is plenty warm.
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  #4  
Old 10-26-2021, 03:59 PM
JwWright57 JwWright57 is offline
 
Join Date: Dec 2016
Location: Charlotte, NC
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Quote:
Originally Posted by peter houpt View Post
for the canopy you need a no 30 and 27 plexiglass drill bit.

the no 30 can be ordered through Spruce. But I can not find a no 27. Is the diameter very critical?
I think I ended up needing 3 different plexiglass bits for the 12 and got them from McMasters.
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  #5  
Old 10-26-2021, 04:11 PM
Reflex Reflex is offline
 
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Location: Kansas
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The #27 is pretty darned hard to find. I got mine here:

https://www.abbeon.com/ItemSearch--search-Wdn--srcin-1
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  #6  
Old 10-26-2021, 05:51 PM
Bob Y Bob Y is offline
 
Join Date: Jul 2017
Location: Piedmont, SC
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Instead of using progressively larger drill bits to enlarge the pilot holes, I took the recommendation in Section 5 and used reamers. And as mentioned earlier, I oversized the holes slightly to avoid any potential binding. I called Vanís Support on this, and they recommended the reamer approach over drilling.
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  #7  
Old 10-27-2021, 10:45 AM
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rcarsey rcarsey is offline
 
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Location: North Brunswick, NJ
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I used Abbeon Plastics for all my plastic drill bit needs.

https://www.abbeon.com/Item--i-2118
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  #8  
Old 10-27-2021, 05:25 PM
John Tierney John Tierney is offline
 
Join Date: Jan 2006
Location: Vonore, TN
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ATS has a selection, probably from Bob Avery's old supply.
https://aircraft-tool.com/shop/searc...id=6274&page=1
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  #9  
Old 10-27-2021, 05:34 PM
agent4573 agent4573 is offline
 
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Location: Mountain view
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https://www.mcmaster.com/drill-bits/...s-for-plastic/

Mcmaster carries every size as well. On Mcmaster, a 27 gauge bit = #27. A 30 gauge bit = #30.
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Last edited by agent4573 : 10-27-2021 at 05:37 PM.
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  #10  
Old 10-27-2021, 05:46 PM
N8DAV8R N8DAV8R is offline
 
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Location: Salida, Ca
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FWIW, I cracked up a landing light lens (multiple times) with a plastics bit that I think came from McMaster but may have been another source. On the other side, and on the replacement lens, I did the old 'run a regular bit against some concrete' trick and successfully finished the job.

I'm not sure what the heck I'm going to to when it comes to the canopy, but I'm only a couple weeks away from that point so I appreciate the food for thought!
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