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SantosDumont · 06-16-2013, 02:12 PM

In the process of putting a new ESC on my 7HV and I happened to pull up on the motor can (new motor with single magnets, the painted top and chrome can). There seems to be a lot of travel of the stator up and down on the shaft. Is this too much? Is it anything to worry about? The can isn't rubbing against the bottom plate.

crf69 · 06-16-2013, 06:33 PM

i would shim to where half that play is gone.

some is need for heat expansion.

Stolla · 06-17-2013, 12:03 AM

None is needed for heat expansion, at least not that you can measure, shim it so you have no play but no binding either so inadvertently you want to have thousands of a mm play not really noticeable. Think what a moving can do to amongst others a herringbone gear.

SantosDumont · 06-17-2013, 10:47 AM

Thanks for the input, I'll shim it tighter.

lazor 22 · 06-17-2013, 11:01 AM

I think your c clip slipped up out of the slot in the shaft, check that

SantosDumont · 06-17-2013, 07:42 PM

C clip is still in place. Wish I had another one to put on top of it because it would fill the gap nicely.

Druekerfish · 07-03-2013, 04:36 PM

Are you sure the c-clip is in the slot? I had a similar issue and the slot is not reachable below the bearings. The c-clip is just on the shaft but not properly installed.

Airworks · 07-04-2013, 02:48 AM

Quote:

Originally Posted by Druekerfish

Are you sure the c-clip is in the slot? I had a similar issue and the slot is not reachable below the bearings. The c-clip is just on the shaft but not properly installed.

Had one too.could only get the tips of the clip to get onto the slot , but not "seat" into the slot fully.

Druekerfish · 07-04-2013, 03:23 AM

OK, I am getting a new one (very good service from the distributor) and will check the differences. It is a pity that they did not make a design that allows the main shaft to be shifted up/down with a set screw to adjust the tolerances and the play.

SantosDumont · 07-04-2013, 10:36 PM

Thanks for the input. The C clip is in place. Finding shims that will fit is a pain. I should send it back but I live in Rio and sending stuff back and forth is a nightmare.

redsoper · 07-06-2013, 01:27 AM

you said if you had another c-clip it would full in the gap? if so I got a spare c-clip shoot me your address in a pm I will send you one..

SantosDumont · 09-07-2013, 10:57 AM

A big thank you to Redsoper for sending me a new c-clip. I still had to shim it anyway but couldn't have done it without the new c-clip. If anyone needs shims, AMainHobbies sells a Kyosho 8x10mm shim set (containing several 0.1, 0.2, and 0.3 shims) that works great. I found a similar problem on my 600 MX and 700 MX motors. Kyosho also make the 6x10mm shim sets.

KBaksh · 09-17-2013, 06:44 AM

I have the same motor with the same amount of play, Did you got it replaced or did the shims work for you. The reason I ask is that I notice my other motor have play and would want to think this is normal.

SantosDumont · 09-17-2013, 04:26 PM

The shims took care of it. I needed .3 mm total.

06-16-2013, 06:33 PM	#2 (permalink)
crf69 Registered Users My HF Map location Join Date: Aug 2011	i would shim to where half that play is gone. some is need for heat expansion. __________________ you should look into it...........

06-17-2013, 12:03 AM	#3 (permalink)
Stolla Registered Users Join Date: Jul 2009	None is needed for heat expansion, at least not that you can measure, shim it so you have no play but no binding either so inadvertently you want to have thousands of a mm play not really noticeable. Think what a moving can do to amongst others a herringbone gear. __________________ Tdr quantum 4530 1.4 yy h/ jive120 beastx, Vibe e 8 12s mx 700 1.32yy vbargov fusionhawk, Banshee nr 36 kosmik 200 pyro 800 1.4yy 455kv 14s beastx, xtreme 700 pyro 850 1.5yy 14s kosmik 200

06-17-2013, 11:01 AM	#5 (permalink)
lazor 22 Registered Users My HF Map location Join Date: Apr 2010	I think your c clip slipped up out of the slot in the shaft, check that __________________ Lincoln #HIGHONHELIS ):> Pull Hard RCHO Flying Field, Knightdale NC

07-04-2013, 03:23 AM	#9 (permalink)
Druekerfish Registered Users Join Date: May 2008	OK, I am getting a new one (very good service from the distributor) and will check the differences. It is a pity that they did not make a design that allows the main shaft to be shifted up/down with a set screw to adjust the tolerances and the play. __________________ Logo 600 - Joker 3 - TDR - Diabolo - Gaui X5 - Compass 7HV

07-06-2013, 01:27 AM	#11 (permalink)
redsoper Registered Users Join Date: Jun 2011 Location: North Korea	you said if you had another c-clip it would full in the gap? if so I got a spare c-clip shoot me your address in a pm I will send you one.. __________________ (*WARNING* Stop Spamming Helifreak) freedom is slavery. Citizen 375 Fly it like you stole it Money does bring happiness, never seen a sad person on a jet ski

06-17-2013, 10:47 AM	#4 (permalink)
SantosDumont Registered Users Thread Starter Join Date: Oct 2010	Thanks for the input, I'll shim it tighter.

06-17-2013, 07:42 PM	#6 (permalink)
SantosDumont Registered Users Thread Starter Join Date: Oct 2010	C clip is still in place. Wish I had another one to put on top of it because it would fill the gap nicely.

07-03-2013, 04:36 PM	#7 (permalink)
Druekerfish Registered Users Join Date: May 2008	Are you sure the c-clip is in the slot? I had a similar issue and the slot is not reachable below the bearings. The c-clip is just on the shaft but not properly installed.

07-04-2013, 10:36 PM	#10 (permalink)
SantosDumont Registered Users Thread Starter Join Date: Oct 2010	Thanks for the input. The C clip is in place. Finding shims that will fit is a pain. I should send it back but I live in Rio and sending stuff back and forth is a nightmare.

09-07-2013, 10:57 AM	#12 (permalink)
SantosDumont Registered Users Thread Starter Join Date: Oct 2010	A big thank you to Redsoper for sending me a new c-clip. I still had to shim it anyway but couldn't have done it without the new c-clip. If anyone needs shims, AMainHobbies sells a Kyosho 8x10mm shim set (containing several 0.1, 0.2, and 0.3 shims) that works great. I found a similar problem on my 600 MX and 700 MX motors. Kyosho also make the 6x10mm shim sets.

09-17-2013, 06:44 AM	#13 (permalink)
KBaksh Registered Users Join Date: Oct 2011 Location: Hollis NY.	I have the same motor with the same amount of play, Did you got it replaced or did the shims work for you. The reason I ask is that I notice my other motor have play and would want to think this is normal. __________________ Karim

09-17-2013, 04:26 PM	#14 (permalink)
SantosDumont Registered Users Thread Starter Join Date: Oct 2010	The shims took care of it. I needed .3 mm total.

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