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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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Old 10-26-2021, 02:56 PM
Mike S's Avatar
Mike S Mike S is offline
Senior Curmudgeon
Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 16,337

Good source of plastic tools. They also have a great cleaner for the windscreen.
Mike Starkey
VAF 909

Rv-10, N210LM.

Flying as of 12/4/2010

Phase 1 done, 2/4/2011

Sold after 240+ wonderful hours of flight.

"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
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Old 10-26-2021, 03:30 PM
clam clam is offline
Join Date: Oct 2005
Location: Lakeland, TN
Posts: 238

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.
RV-8 N605TT
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Old 10-26-2021, 03:59 PM
JwWright57 JwWright57 is offline
Join Date: Dec 2016
Location: Charlotte, NC
Posts: 282

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.
Jeff Wright, Charlotte NC
Rv-12is with 912is and Dynon system.
Certified Aug 2021
Dues paid 2022
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Old 10-26-2021, 04:11 PM
Reflex Reflex is offline
Join Date: Jan 2015
Location: Kansas
Posts: 210

The #27 is pretty darned hard to find. I got mine here:
Dues Paid for 2022
Emp Complete (including fiberglass)
Wings complete (including fiberglass)
Fuse Complete
Working on Finishing Kit
Working on Avionics
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Old 10-26-2021, 05:51 PM
Bob Y Bob Y is offline
Join Date: Jul 2017
Location: Piedmont, SC
Posts: 369

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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Bob Y - builder 12iS E-LSA
N569TT first flight 2/9/2020
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Old 10-27-2021, 10:45 AM
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rcarsey rcarsey is offline
Join Date: Jul 2012
Location: North Brunswick, NJ
Posts: 340

I used Abbeon Plastics for all my plastic drill bit needs.
Rob Carsey, North Brunswick NJ
RV-12iS (N713) / Completed 12/2020
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Old 10-27-2021, 05:25 PM
John Tierney John Tierney is offline
Join Date: Jan 2006
Location: Vonore, TN
Posts: 568

ATS has a selection, probably from Bob Avery's old supply.
John Tierney
Vonore, TN
RV-7A - N777JT Flying
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Old 10-27-2021, 05:34 PM
agent4573 agent4573 is offline
Join Date: Aug 2019
Location: Mountain view
Posts: 502

Mcmaster carries every size as well. On Mcmaster, a 27 gauge bit = #27. A 30 gauge bit = #30.
__________________ - out of date, will be updated soon
N69ER - built and flying.

Last edited by agent4573 : 10-27-2021 at 05:37 PM.
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Old 10-27-2021, 05:46 PM
N8DAV8R N8DAV8R is offline
Join Date: Apr 2007
Location: Salida, Ca
Posts: 141

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!
Nate - Salida, Ca
RV-12is - Airframe kits complete. Avionics installed. Finishing firewall forward.
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