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  #1  
Old 10-27-2013, 09:34 AM
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comfortcat comfortcat is offline
 
Join Date: Jul 2005
Location: Southern California
Posts: 617
Default Tapered pin on nose gear...

I've deceided to use the tapered pin to attach the nose gear to the motor mount on my RV-9A. Low cost, well tested mod (Jim Ellis rules) that looks MUCH easier during installation than adding later. Note that the cost is low if you do not screw up the taper when cutting the hole!

BruceH in Ramona is my guide for using a hand tool, LOTS of oil and patience. Do you really have to push that hard to get it to cut?

I bought the #3 tapered reamer from A/S and will attempt next week-end.

Tips? Comments? Warnings?

Just in case I'm a glutton for punishment, do folks use a tapered pin in the mains as well?

CC
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  #2  
Old 10-27-2013, 09:57 AM
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David,

I think you start by drilling out to size "S" bit on the hole. That was the tough part. Almost burned up my drill motor on that one. The reaming can be done by hand. Once the reamer starts making chips, just keep it moving forward and it will go pretty easily as long as it is really oiled up. I helped another builder do his and it went MUCH easier than mine did. It helps to have a buddy and extra hands. Be careful when you get going not to go too far. It is easy to come up on the correct depth very quickly. We would pull out the reamer every few turns near the end, put in the pin and measure how far the threads on the pin were sticking out. Rinse (more oil), repeat as needed....

I think the main gear legs are fine with the provided AN5 hardware. Just be sure to measure the diameter of the bolts and use a correctly sized bit or reamer (not 5/32, which will be too big).
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  #3  
Old 10-27-2013, 11:02 AM
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Default HE KNOWS

Do as Bruce says. He knows it well. He, with my assistance, did my nose gear. Came out perfect. Thanx again Bruce.
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  #4  
Old 10-27-2013, 12:33 PM
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BSwayze BSwayze is offline
 
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I followed Bruce's lead on my tapered pin installation as well. I bought a brand new "S" bit for the pilot hole, and I thought I'd never get that hole drilled. The material is VERY hard and it takes a lot patience, a lot of pushing, a lot of BoeLube, and a big powerful drill (I'd use the biggest electric you can get your hands on). But once the pilot hole is drilled, the tapered reamer takes almost no time, by comparison. I almost went too far! So be careful with the final reaming to depth.
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  #5  
Old 10-27-2013, 12:40 PM
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Default S bit

Bruce do you know if the S size bit is needed for the 6A tapered pin install. My gear was already drilled from the factory so all I ordered was the pin and reamer. Never heard of having to drill out first unless this is something specific to the 7A or a un-drilled gear.
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  #6  
Old 10-27-2013, 08:46 PM
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If you have the tapered pin, take a measurement of the small side diameter at the point where it is going to exit the weldment. Add on the depth of the required washer and measure from there. You want to drill to that diameter (or less). Then you can start the tapered reaming. I followed the instructions online at the Matronics wiki.
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