Kraton Blew a motor apart...

[zackf2468]

I'm not exactly sure how this happened or how to explain it so here are some photos..

Any insight in how this happened would be helpful. Thanks.

 

[nomis38]

If its old maybe a bearing locked up. If its newish id say overheated. Dropped magnet at high speed and blew apart. Ive dropped a few magnets in my time. It sucks lol

 

[jkflow]

Overheated, epoxy holding the kevlar broke down due to that heat, magnets exploded inside and mechanical force ripped the screws out in the front.
Just a pure educated guess, would never happen to anyone else....

Check your motor temps and stay below 170F, above 200 this will happen fairly quickly, might be 1 or 2 sessions after the fact but it's inevitable.

 

[FatCatRC]

My guess the screws on the end cap rattled loose and it came apart.

 

[Sosnl]

sometimes you see things that you don't understand.
and this is one of them

 

[biggman100]

sometimes you see things that you don't understand.
and this is one of them

Not really hard to understand. High heat causes the epoxy to break down, and then parts that shouldnt touch do, things lock up and things go boom. I had a supervisor give me that exact explanation when an electric motor on one of the machines blew up one night, way back when i was still an electrical engineering apprentice.

 

[Camaroboy383]

Overheated, epoxy holding the kevlar broke down due to that heat, magnets exploded inside and mechanical force ripped the screws out in the front.
Just a pure educated guess, would never happen to anyone else....

Check your motor temps and stay below 170F, above 200 this will happen fairly quickly, might be 1 or 2 sessions after the fact but it's inevitable.

I agree, that thing got smoldering hot for sure, if not more than once.. The color of the shaft on the back end is impressive..

 

[zackf2468]

Hahaha thanks guys!! All of your reactions make me want to put it in a display box on a shelf what are some decent cooling fans that would work in AZ heat? Also, would it be ideal to somehow secure a fan right behind the motor? Or would it be pointless due to the debris.

 

[Sandracer_NL]

Yeah Racing heatsink with dual fans. Maybe in Arizona you need upgraded fans. I got upgraded fans (also like the aluminium look of them). Check my build thread for them.

 

[fasterhobbies]

looks like your missing 2 screws and the last one broke from the torque of the motor. i have seen 2050kv screws back off more than once. loctite is your friend.

 

[L3phturn]

Fans are great, but you may want to gear down. What pinion are you running?

 

[zackf2468]

Yeah Racing heatsink with dual fans. Maybe in Arizona you need upgraded fans. I got upgraded fans (also like the aluminium look of them). Check my build thread for them.

Will do. Thanks!

Fans are great, but you may want to gear down. What pinion are you running?

I was using a 16t at the time.

looks like your missing 2 screws and the last one broke from the torque of the motor. i have seen 2050kv screws back off more than once. loctite is your friend.

Yeah I put it everywhere I can. Should I pull the screws out of the new motor then? Just to be safe haha.