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600 Class Electric Helicopters 600 Class Electric Helicopters manufactured by Align, Tarot, SYMA, Airhog, Chaos, HK and similar.


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Old 11-11-2006, 06:03 AM   #1
stevehonn
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Default Helical Pinions, Something to Watch

I've been running the 188/11T helical pinion setup for a while now and decided it was time for just a little more. I've fitted a 12T helical pinion today and noticed that the 11T pinion had slipped down the motor shaft until the grub screw reached the bottom of the flat in the shaft, obviously due to the additional vertical loading with the helical pinions, as a result the pinion was only about 3/4 mesh with the main gear. I'd loctited the grib screw originally and it was still tight but this time I've put a small amount of loctite on the shaft itself and I'll keep an eye on it.

It will be interesting to see if this has any effect upon the life of the motors bearings too.
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Old 11-11-2006, 09:41 AM   #2
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Wierd. I have been running the 12 and noticed that I had to place it AT the bottom of the flat spot in the motor shaft already. Obviously there are some machining differences from motor to motor.....

Bob
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Old 11-11-2006, 02:40 PM   #3
big willie style
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Did either of you have problems with the one way bearings going bad ?

I used green locktight to hold the pinion in place, but this caused the gear to be push up slightly under high speed on one side and prematurly wreck the bearing.
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Old 11-11-2006, 02:53 PM   #4
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I have problems keeping the 11t helical "up" as well. As soon as the power gets high the pinion slides down. I am interested to hear if the locktight holds.
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Old 11-11-2006, 03:41 PM   #5
skew
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I had the same problem. I used a dremel and cut the set screw flat so it seats flat on the motor shaft this also gave it about 1 more thread to bite on the pinon also. I have not had any more problems so far that was about 8 flights ago.
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Old 11-12-2006, 03:47 AM   #6
Raptor Rulezzz
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Quote:
I am interested to hear if the locktight holds.
I always put a tiny drop of blue loctite (#242) on the motor shaft when I mount my pinions, this works very well! Only problem is taking them of, I really need to heat the pinion up a bit to get the loctite to release..

Cheers,

Richard
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Old 11-12-2006, 05:45 AM   #7
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Good idea skew.

I use green locktite on my pinions, and as Richard, I have to use a little heat to get them off.

Do you need green on the T-REX pinions, maybe not, but you do on the Ion-X and I am a creature of habit.
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Old 11-12-2006, 08:58 AM   #8
Finless
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Will as I recall you pinion also sat on the bottom of the motor shaft flat spot?

I am wondering if some of you have your motor mount plate upside down?
Fins on the plate up or down?

The manual has a mistake on one page. One page shows the fins up and one page shows them down. They should be DOWN.

Bob
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Old 11-12-2006, 10:49 AM   #9
stevehonn
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The mounting plate is the right way up. After 3 flights this weekend the pinion is still where I put it and the step up a tooth makes a real difference to the feel of the heli, I'm happy now
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Old 11-12-2006, 11:52 AM   #10
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You are correct Bob, the pinion is all the way down to the bottom of the flat spot.
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Old 11-12-2006, 12:46 PM   #11
skew
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My motor mount is the right way also. But the set screw has to be at the top of the flat spot for the pinion and main gear for be flush with each other on mine.
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Old 11-13-2006, 10:09 AM   #12
KDE Direct
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Anyone also notice play in the motor shaft due to the helical pinion? I've been running the 11T helical and my Align 600L motor failed yesturday (starting making a loud grinding noise and caused the ESC to go into shutdown). I noticed the shaft of the motor had about 1/8" of vertical play, which may be caused by the continual downward force on the shaft from the helical gear. Anyone else notice this?
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Old 11-13-2006, 10:49 AM   #13
skywalkertje
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Mine also has about 1mm of vertical play, but I have never used the helical pinions (yet). I think this is normal, it was there from the beginning I think. I remember finless saying this was normal in an earlier post.
Anyway mine has been running fine for over 100 flights now, I hope it holds out until the XL is available...
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600 Class Electric Helicopters 600 Class Electric Helicopters manufactured by Align, Tarot, SYMA, Airhog, Chaos, HK and similar.

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