Chewed Up Pinion - Help!

[ridgehead44]

Hey all,


I took out my TC Asuga for its maiden run with the MAX6 G2 motor/esc combo. It was awesome...for about 3 seconds. I could hear a high-pitched whine just before I lost all power. I took it back to the bench and saw my 19t pinion had been chewed to bits.

Obviously, I've got some bad gear mesh. Is it too loose? Too tight? Is there anything else that could cause this? I'd used what I thought was a hardened steel pinion, but maybe not, given the results. Any advice on how to trouble shoot this is mightily appreciated. Thank you!

 

[Beer_Goggles_RC]

What’s your shimming method? I’ve found that for mod1 a piece of standard printer paper between the gears then smashed together gets it pretty close to perfect

Looks like mesh was loose to me, but pic of pinion is a little unclear

 

[ridgehead44]

@Beer_Goggles_RC I just tried to go by feel. So, the paper method has worked out for you?

 

[CertifiedMike]

Hey all,


I took out my TC Asuga for its maiden run with the MAX6 G2 motor/esc combo. It was awesome...for about 3 seconds. I could hear a high-pitched whine just before I lost all power. I took it back to the bench and saw my 19t pinion had been chewed to bits.

Obviously, I've got some bad gear mesh. Is it too loose? Too tight? Is there anything else that could cause this? I'd used what I thought was a hardened steel pinion, but maybe not, given the results. Any advice on how to trouble shoot this is mightily appreciated. Thank you!

View attachment 250094

Remember to use blue locktite for all metal to metal threaded connections on that beast too.

 

[Beer_Goggles_RC]

@Beer_Goggles_RC I just tried to go by feel. So, the paper method has worked out for you?

Yep, I used paper method for about a year until I really got the feel for it. I believe that asuga is M1 so printer paper would work. For 32p or .8M then notebook paper. Then on 48p/0.6M kind of as close as you can get it and still have a smidge of play

 

[ridgehead44]

Thank you so much!

 

[WickedFog]

Hey all,


I took out my TC Asuga for its maiden run with the MAX6 G2 motor/esc combo. It was awesome...for about 3 seconds. I could hear a high-pitched whine just before I lost all power. I took it back to the bench and saw my 19t pinion had been chewed to bits.

Obviously, I've got some bad gear mesh. Is it too loose? Too tight? Is there anything else that could cause this? I'd used what I thought was a hardened steel pinion, but maybe not, given the results. Any advice on how to trouble shoot this is mightily appreciated. Thank you!

View attachment 250094

Because that pinion is not the correct pitch. Look at how small the teeth are on the pinion, compared to the spur.

Like in this pic, one is a 48p, the other is 32p. These do not mesh together.

Yours spur looks like a mod1.

 

[RustyUs]

Checking

@Beer_Goggles_RC I just tried to go by feel. So, the paper method has worked out for you?

You will need to take your setting of the mesh one step further and check for any high spots around the entire circumference of the spur gear like shown in video below:

If unsure what pitch a gear is, you can count the teeth and measure: https://scriptasylum.com/rc_speed/gear_calc.html

 

[ridgehead44]

Thanks for the advice, everybody. I've got a pair of Tekno pinions coming in. I'll use the advice I got here and hopefully that'll take care of everything. Thanks again for all your help!