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Other › tail rotor shaft size (what the)?
10-12-2005 01:01 AM  12 years agoPost 1
poletime

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vic Australia

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I've upgraged the pitch slider and tr grips etc to the new 3k versions. The pitch slider seemed a bit notchy on the old shaft so I ordered a new tr shaft. It didn't fit in the bearings and it didn't even go through the new pitch slider.

Made sure there were no burs on the shaft ends. I miced it and found the old shaft (V2) was 2.96mm and new one was 3mm.

Has anyone else had this problem, perhaps an entire batch of shafts have been done to the wrong size.

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10-12-2005 01:36 AM  12 years agoPost 2
JiggerInc

rrApprentice

Arlington, VA

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Yeah.. many of the "XL" tail shafts are too big to fit in the bearings. Your measurements might be a tad off, however, as the bearings are 3mm I.D. exactly.. so the X shafts should be 3mm, while these fat XL shafts should be 3.04mm or whatever. I'm not sure when the bad batches will stop, though, because I bought a pack of tail shafts last week and 1 of 3 was too big.

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10-12-2005 02:40 AM  12 years agoPost 3
poletime

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vic Australia

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I checked the micrometer and the cal was ok, just to elaborate on the measurements the ends of the shafts were 3mm and in the center it was 2.99. On the original shaft it was 2.96 in the middle and 2.07 on the ends. I could understand the XL shaft not fitting the original bearings but it doesn't even fit its own XL pitch slider, go figure.

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10-12-2005 03:30 AM  12 years agoPost 4
poletime

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vic Australia

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I didn't have any bearings at hand but then again the shaft must fit the XL pitch slider which would be the same size.

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10-13-2005 04:38 AM  12 years agoPost 5
Keithf

rrNovice

Sydney, Australia

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I had the same issue with a pack of spare tail shafts. None would fit. I also mic'd them and found them to be larger than the original.

I just used a piece of 400 wet & dry held between 2 fingers, inserted the shaft end, and rotated repeatedly for several minutes. This was enough to turn down the ends enough to fit the bearings & slider.

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10-13-2005 04:47 AM  12 years agoPost 6
MikeInMobile

rrElite Veteran

Mobile, Alabama

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Go with an aftermarket stainless steel tail shaft ...... it won't bend so it will last FOREVER.

I personally am using a titanium setup in a Microheli tail box (the Microheli tail shafts ONLY fit the Microheli tail box ..... bummer )

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