Helical Pinions, Something to Watch

stevehonn · 11-11-2006, 06:03 AM

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.

Finless · 11-11-2006, 09:41 AM

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

big willie style · 11-11-2006, 02:40 PM

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.

ozace · 11-11-2006, 02:53 PM

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.

skew · 11-11-2006, 03:41 PM

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.

Raptor Rulezzz · 11-12-2006, 03:47 AM

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

WillJames · 11-12-2006, 05:45 AM

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.

Finless · 11-12-2006, 08:58 AM

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

stevehonn · 11-12-2006, 10:49 AM

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

WillJames · 11-12-2006, 11:52 AM

You are correct Bob, the pinion is all the way down to the bottom of the flat spot.

skew · 11-12-2006, 12:46 PM

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.

KDE Direct · 11-13-2006, 10:09 AM

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?

skywalkertje · 11-13-2006, 10:49 AM

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...

11-11-2006, 06:03 AM	#1
stevehonn Registered Users My HF Map location Join Date: Jun 2006 Location: Halesowen, UK	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. __________________ Steve H Trex 600N Sport, 700N , Trex 250, Beam E4, Trex 550E, Raptor E550, Mikado Logo 500 3D, now a happy user of Futaba 10CG

11-11-2006, 02:53 PM	#4
ozace Registered Users Join Date: May 2006 Location: Melbourne, Australia	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. __________________ more than enough now

11-12-2006, 08:58 AM	#8
Finless Team Taco VP My HF Map location Join Date: Nov 2005 Location: Stanton, Ca. USA	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 __________________ "Don't Taco My Pack Dude!" To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. *To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.* *To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.* *To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.* *To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.*

11-12-2006, 10:49 AM	#9
stevehonn Registered Users Thread Starter My HF Map location Join Date: Jun 2006 Location: Halesowen, UK	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 __________________ Steve H Trex 600N Sport, 700N , Trex 250, Beam E4, Trex 550E, Raptor E550, Mikado Logo 500 3D, now a happy user of Futaba 10CG

11-12-2006, 11:52 AM	#10
WillJames HF Support My HF Map location Join Date: Mar 2004 Location: Western, NC	You are correct Bob, the pinion is all the way down to the bottom of the flat spot. __________________ William James To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. If you fly you are going to crash. To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

11-11-2006, 09:41 AM	#2
Finless Team Taco VP My HF Map location Join Date: Nov 2005 Location: Stanton, Ca. USA	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 __________________ "Don't Taco My Pack Dude!" To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. *To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.* *To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.* *To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.* *To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.*

11-11-2006, 02:40 PM	#3
big willie style Registered Users Join Date: Apr 2004 Location: AB. Canada	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.

11-11-2006, 03:41 PM	#5
skew Registered Users Join Date: May 2006 Location: KY	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.

11-12-2006, 05:45 AM	#7
WillJames HF Support My HF Map location Join Date: Mar 2004 Location: Western, NC	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.

11-12-2006, 12:46 PM	#11
skew Registered Users Join Date: May 2006 Location: KY	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.

11-13-2006, 10:09 AM	#12
KDE Direct Registered Users Join Date: May 2006 Location: Washington, U.S.A.	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?

11-13-2006, 10:49 AM	#13
skywalkertje Registered Users Join Date: Mar 2006 Location: Belgium	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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