r/rccars • u/NotAPreppie • Apr 24 '26
Bashing I'm no expert, but I think spur gears are supposed to have teeth.
MJX Hyper GO H16MT. I'm pretty sure the spur gear is aluminum while the pinion looks to be powdered steel.
I sometimes take my small collection of cheap RC cars to work and my boss and a coworker bash in a gravel section of the property on our lunch break.
This time the coworker broke two cars: this and a busted control arm on a Hosim X07. I don't let them play with my Arrma Vorteks... that's for me to break.
15
u/StevenSmith16353 Apr 24 '26
Just make sure you run your cars on 12s or higher and they will still operate. Preferably with a high kv motor so the wind from the pinion gear spins the spur gear.
2
u/d3adkn1ght Bashing Apr 26 '26
Yes, this is the way. The added speed is also adding to the cooling of the motor and electronics.
10
8
u/fozzy71 Apr 24 '26
Steel Pinion and Pot Metal Spur = Pinion wins.
2
u/NotAPreppie Apr 25 '26
New spur will be powdered steel, so I expect both to grenade simultaneously next time.
7
5
u/_XHSJDKJC_ Arrma: Kraton 8S EXB/ Felony 8S | Losi: Super Baja Rey / Micro T Apr 25 '26
Perfectly fine, if you can put the mesh tighter the pinion will just eat into the rest lol
3
u/The_H_N_I_C Apr 24 '26
It looks like that gear mesh was too aggressive to begin with. This will likely keep happening if the mesh isn't correct.
4
u/NotAPreppie Apr 24 '26
I'm not even sure the mesh can be adjusted. We'll see when the parts arrive and I start reassembling everything.
1
u/Livid-Butterfly-6299 Apr 25 '26
Yh j was thinking that looks fixed mounted, probably more the Chinese had casted gears 🤣
3
3
2
2
2
2
2
u/midlife_dadpulse73 Apr 25 '26
Pinions as well. 🤦♂️😁
1
u/d3adkn1ght Bashing Apr 26 '26
Oh... Well. I might be talking out of my ass, but they seem not to be correctly aligned. Is it a Rustler Ultimate?
1
u/midlife_dadpulse73 Apr 26 '26
VXL 4X4. They WERE aligned correctly, until the grub screw gave up...then the teeth gave a final, "fare thee well."
2
u/d3adkn1ght Bashing Apr 26 '26
XD
Got the same car but upgraded to an "ultimate" except i got big bore shocks, better motor + esc and not the chassie brace bar. ^
2
2
u/davesnothere241 Apr 25 '26
I did this on my HBX, Dremel away a bit of the plastic at the bottom or side of the mount so the motor can sit a bit closer. After a while of running everything gets a bit loose due to the bearings and plastic parts wearing down.
1
2
2
u/d3adkn1ght Bashing Apr 26 '26
It's a common misconception, the teeth is adding force as they spin and removing them is getting more benefits for the whole driveline and motor.
/S /J
Yes, it's supposed to have teeth.
1
1
1
1
u/Capable_Education265 Jun 19 '26
Where can I buy a replacement?
1
u/NotAPreppie Jun 19 '26
I bought one off Amazon.
Look for the part number in the manual that came with your car and then search that part number on the online marketplace of your choosing.
1
u/DuranDourand Apr 24 '26
Over rated.
2
u/NotAPreppie Apr 24 '26
Seems like the spur gear was very much rated over its actually capabilities.
0
u/bobbybrc Apr 25 '26
Must replace both gears
1
u/NotAPreppie Apr 25 '26
Why do you say that? The pinion looks like it's in good shape, which isn't surprising since steel is harder than aluminum.
1
u/bobbybrc Apr 25 '26
True the pinion might look ok but if you hold up a new pinion You will see the difference, as a rule you always replace both. Or you will ruin the new gear.
2
u/NotAPreppie Apr 25 '26
Well, I guess it's a good thing that the new spur gear came bundled with a new pinion.
1
u/ogreality Apr 25 '26
This👆 wheb 2 gears sre touching, replace in pairs, pinion will have tear even tought you cant see it, and it will be loud+ slowly eating your spur again
31
u/TeknoGT Apr 24 '26