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  #1  
Old 09-14-2016, 09:36 AM
AviatorJ AviatorJ is offline
 
Join Date: Feb 2015
Location: Oklahoma City
Posts: 912
Default Tip: Making Bushings

Recently I discovered an easier and painless (literally) method of making some of the small bushings required on an RV build. Previously on another step I used a band saw to cut to size and tried to hold the small pieces with my hands, or shop towels while grinding. This often resulted in fiunger burns, non-symmetrical pieces and a number of times parts flying around my garage when I lost grip on the wheel.

While working on the flap section which requires four bushings I devised another way to create these and posted it on my build log. Surprisingly someone actually reads that and suggested that I post on VAF as a tip. Hope others find value and I'll start with the finished product;




To start I replaced using the band saw with a small pipe cutter. This was much easier than using the band saw. You can line it up exactly to your mark and it comes out straight and doesn't heat the piece up at all. If the part is long enough you can rotate it with your hand, if it's not you can use a set of vice grips and rotate it with those.





You end up with a rough cut bushing that will require a bit of finishing work. You'll want to clean the base of the bushing by just putting it on a pair of vice grips (Lightly, don't mark it up... or use tape) and just run it against the flat part of a grind wheel. This is also the time to size the bushing, I personally use a HF micrometer that cost around $8. Depending on how much you grind off you'll want the part fairly cool when you measure it.



After deburring the inside you'll want to round out the edges a bit. You can in essence use the AN bolt as a lathe and push it against the grind wheel at an angle. This spins the piece and puts a consistent rounding around the entire part.



I'm really happy with the way these turned out and the lack of injuries and the time saved searching around my garage floor for little parts that flew off the wheel. Happy building!
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RV-10, N10JW
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  #2  
Old 09-14-2016, 09:51 AM
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wirejock wirejock is offline
 
Join Date: Oct 2005
Location: Estes Park, CO
Posts: 3,931
Default Tip

I love tips and have done it this way too. Thanks
If long enough, I sometimes chuck the piece in a drill press and use a tungsten bar on the press table with emery cloth and oil to square the ends to final dimension by gently lowering the chuck against the sanding block.
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Larry Larson
Estes Park, CO
http://wirejockrv7a.blogspot.com
wirejock at yahoo dot com
Donated 12/03/2019, plus a little extra.
RV-7A #73391, N511RV reserved (2,000+ hours)
HS SB, empennage, tanks, wings, fuse, working finishing kit
Disclaimer
I cannot be, nor will I be, held responsible if you try to do the same things I do and it does not work and/or causes you loss, injury, or even death in the process.
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  #3  
Old 09-14-2016, 09:57 AM
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Lemmingman Lemmingman is offline
 
Join Date: Jun 2010
Location: McKinney, TX
Posts: 689
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I do it the same way as Larry, but I take the scotchbrite wheel off of the bench grinder and put it on the table of the drill press.
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Gil Brice
McKinney, TX EAA-1246
RV7 - Working on fuse, fuel, brakes etc...
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  #4  
Old 09-14-2016, 10:38 AM
WingsOnWheels WingsOnWheels is offline
 
Join Date: Mar 2009
Location: Plano, TX
Posts: 2,088
Default

I chuck it up in my 12X28 lathe and it is super easy...haha is that cheating?
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RV-6A #20603
Complete 5/10/19
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  #5  
Old 09-14-2016, 10:49 AM
Tom Martin Tom Martin is offline
 
Join Date: Jan 2005
Location: Ontario, Canada
Posts: 1,544
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A drill press and a vixen file are all you need to make perfect bushings. The drill press makes a "lathe". Use a hack saw to cut to rough length, chuck them in the drill press and use a vixen file, while the drill is running, to turn them to the correct length
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EVO F1 Rocket 1000 hours,
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