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.311 drill bit? (or 7.9mm?)

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CJohnston(at)popsound.com
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Posted: Sun Apr 23, 2006 8:02 am Post subject: .311 drill bit? (or 7.9mm?)

hey all - 



there's a hole that needs to be drilled in the gear mount with a .311 drill bit.  where do you get this?  or 7.9mm.  does this measurement correlate with a numbered drill bit?  help.



cj

#40410

fuse

www.perfectlygoodairplane.net

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rvbuilder(at)sausen.net
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Posted: Sun Apr 23, 2006 8:46 am Post subject: .311 drill bit? (or 7.9mm?)

 This has been discussed at length before.  Please check the archives and then follow up with any additional questions.

 

 Michael Sausen

 -10 #352 fuselage

 DO NOT ARCHIVE

 

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ichelva(at)netspace.net.a
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Posted: Sun Apr 23, 2006 8:47 am Post subject: .311 drill bit? (or 7.9mm?)

Avery Tools sell an undersized 5/16 reamer which is .3110 inch in diameter.

Works nicely for a snug fit of the landing gear bolt



Indran Chelvanayagam

 



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mark(at)macomb.com
Guest

Posted: Sun Apr 23, 2006 9:00 am Post subject: .311 drill bit? (or 7.9mm?)

Chris,

You can buy one from McMaster-Carr. http://www.mcmaster.com/ items 

2958A126 and 30565A304 seem to fit the bill. Enco is another good source 

for drills and things but their page is down this morning.



There was some chatter several months ago concerning this size of bit. 

Someone proposed one builder buying a bit and passing it along to the 

next builder who needed it. Maybe that has happened. I intend to order a 

couple next time I need something from McMaster-Carr. The bits only cost 

$4.00 but the shipping will probably double the price.

Mark



Chris Johnston wrote:

 	  Quote: 	
		   hey all - 

 

 there's a hole that needs to be drilled in the gear mount with a .311 drill bit.  where do you get this?  or 7.9mm.  does this measurement correlate with a numbered drill bit?  help.

 

 cj

 #40410

 fuse

 www.perfectlygoodairplane.net


	




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jesse(at)itecusa.org
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Posted: Sun Apr 23, 2006 9:38 am Post subject: .311 drill bit? (or 7.9mm?)

We, as I believe Van's says is fine, used a 5/16 reemer and did it very

carefully.  The bolt still fit very snug for us, just make sure that you get

a clean 5/16 and not oversize it.



Jesse Saint

I-TEC, Inc.

jesse(at)itecusa.org

www.itecusa.org

352-465-4545



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ninepapa(at)bendbroadband
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Posted: Sun Apr 23, 2006 11:18 am Post subject: .311 drill bit? (or 7.9mm?)

Chris



All number drills are too small



No letter drills are close.



7.9mm is .311024", thats pretty close.



John

40359

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Tim(at)MyRV10.com
Guest

Posted: Sun Apr 23, 2006 5:39 pm Post subject: .311 drill bit? (or 7.9mm?)

I had a friend with a .311 reamer in his machine supplies.  I think

you could easily get one at a local machine tool supply house.

I would strongly suggest going with the proper size reamer

and not just a drill bit though.  I reamed mine and must have put

just the slightest amount of crookedness to the hole, and now I

have just the smallest bit of play in one gear leg.  I plan to

pull the seat and add some type of gap-fill loctite to the

bolt to ensure that it doesn't have any play in it, as play

will only get worse over time.



Tim Olson - RV-10 N104CD - Flying

do not archive

Jesse Saint wrote:

[quote] 

 

 We, as I believe Van's says is fine, used a 5/16 reemer and did it very

 carefully.  The bolt still fit very snug for us, just make sure that you get

 a clean 5/16 and not oversize it.

 

 Jesse Saint

 I-TEC, Inc.

 jesse(at)itecusa.org

 www.itecusa.org

 352-465-4545

 

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