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Gas spring mounts?

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a.s.elliott(at)cox.net
Guest

Posted: Sun Aug 17, 2008 5:42 pm Post subject: Gas spring mounts?

Gang:

  

 I have had some trouble trying to drill the 1/16" holes in the 5/16" steel  mounting pins for the canopy gas springs.  On the first one I tried, with a  brand new 1/16" bit, using lubricant and clearing the hole regularly, the bit  broke off about 2/3 of the way through and could not be extracted.  Not  good.  IMHO, it would have been a lot smarter to drill the pins before  welding the parts, but they came from the factory solid.  

  

 Before I completely screw up both my factory-assembled canopy frame and the  factory-installed fuselage mounts, I would like to get some ideas from  successful drillers as to how they managed it.

  

 My current thought is to go up quite a few drill sizes, maybe all the way  to #40, and use a larger cotter pin.

  

 Are there other good ways to secure the gas springs on the pins?

  

 Thanks,

 Andy Elliott, Mesa, AZ

N601GE (registered)

601XL/TD, Corvair,  finishing...

   [quote][b]

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psm(at)att.net
Guest

Posted: Sun Aug 17, 2008 6:52 pm Post subject: Gas spring mounts?

Hi Andy,



 I think going to a 3/32 hole and cotter pin would be no problem.  That still leaves the issue of removing the remaining drill bit point.  Your local hardware store probably has lots of special tools and good advice about how to remove the stuck drill.



 There are several kinds of drills you can use for making the required holes.  A "High Speed" steel bit will be less likely to break than a cobalt drill, but it won't hold its edge as long.  



 Good luck,



 Paul

 XL getting close

 do not archive



 

 At 06:41 PM 8/17/2008, you wrote:

 [quote]Gang:

  

 I have had some trouble trying to drill the 1/16" holes in the 5/16" steel mounting pins for the canopy gas springs.  On the first one I tried, with a brand new 1/16" bit, using lubricant and clearing the hole regularly, the bit broke off about 2/3 of the way through and could not be extracted.  Not good.  IMHO, it would have been a lot smarter to drill the pins before welding the parts, but they came from the factory solid.  

  

 Before I completely screw up both my factory-assembled canopy frame and the factory-installed fuselage mounts, I would like to get some ideas from successful drillers as to how they managed it.

  

 My current thought is to go up quite a few drill sizes, maybe all the way to #40, and use a larger cotter pin.

  

 Are there other good ways to secure the gas springs on the pins?

  

 Thanks,

 Andy Elliott, Mesa, AZ

 N601GE (registered)

 601XL/TD, Corvair, finishing...



  	  Quote: 	
		  

[/b] 	
[b]

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jaybannist(at)cs.com
Guest

Posted: Mon Aug 18, 2008 3:05 am Post subject: Gas spring mounts?

Andy,



While I was able to drill those gas spring pivot pins without a lot of 

trouble, I have discovered that there are new, sharp drill bits that 

may not be up to the job.  I have drilled AN3 bolts for cotters several 

times.  On a couple of those, new, sharp bits seemed to only scratch 

the surface after a minute or so of drilling.  The second or third bit 

I tried drilled through just like it was supposed to. My take is that 

all 1/16" drill bits are not alike, even from the same source. 

Consequently, when I find one that won't do the job, I just toss it and 

try another one. I don't know if the difference is hardness or the 

angle of the drill point.



Also, if you look closely at bolts that are already drilled, you will 

notice that the hole is beveled or countersunk at the face.  That can 

be done with a larger bit or a small ball grinding bit in a Dremel.  It 

really helps getting the cotter into the hole.



Good Luck - Jay in Dallas

--

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larry(at)macsmachine.com
Guest

Posted: Mon Aug 18, 2008 6:03 am Post subject: Gas spring mounts?

Hi Andy,

I put cotters thru the standard clevis pins, but only used a blue 

thread-lock paste on the threads

holding the rod ends.



Larry McFarland 601HDS at www.macsmachine.com



Dr. Andrew Elliott wrote:



 	  Quote: 	
		   Gang:

  

 I have had some trouble trying to drill the 1/16" holes in the 5/16" 

 steel mounting pins for the canopy gas springs.  On the first one I 

 tried, with a brand new 1/16" bit, using lubricant and clearing the 

 hole regularly, the bit broke off about 2/3 of the way through and 

 could not be extracted.  Not good.  IMHO, it would have been a lot 

 smarter to drill the pins before welding the parts, but they came from 

 the factory solid. 

  

 Before I completely screw up both my factory-assembled canopy frame 

 and the factory-installed fuselage mounts, I would like to get some 

 ideas from successful drillers as to how they managed it.

  

 My current thought is to go up quite a few drill sizes, maybe all the 

 way to #40, and use a larger cotter pin.

  

 Are there other good ways to secure the gas springs on the pins?

  

 Thanks,

 Andy Elliott, Mesa, AZ

 N601GE (registered)

 601XL/TD, Corvair, finishing...

- The Matronics Zenith-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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