How do you put pinon on non flat....

[bob2300NX]

Hey guys, I herd you could put a pinion on a flat shaft motor, is this true?


Thanx

[BPPSupermaxx]

Yeah its easy, take a file, and file down the flat spot. Thats what I did...

[mtrsprt]

I used my Dremel for my Lehner XL3600.

Came out like it supposed to be there.

If someone tells you, that you do not need to have a flat spot,tell them to go home.........

[bomb-proof]

Its absolutely nessisary to have the flat spot.

[re-inferno]

Racing with BL for more than a year now, mostly offroad, never lost a pinion, always had nice fully round shafts :)

I don't like statements as
If someone tells you, that you do not need to have a flat spot,tell them to go home.........

Remember to always distinguish between an 1/10 scale buggy, where peak power is around 300-400W and monster trucks, where we talk about 1000+W and a flat spot *could* come in handy ;)

In the range of 1500+W on one shaft, you won't get far with your flat spot, because the grub screw takes all the torque then (in contrast to a round shaft!) and as you can imagine, the screw won't last all too long - that's why the airplaine guys loctite their pinions to the shaft (and use a pinion demounting tool afterwards)

[Mr. Constructor]

I f you do plan to grind it with a dremel, make shure that nothing of the small metal debris will enter the motor housing AND the bearing, the small metal parts will scratch the winds and the rotor fairly fast, so take care !!
(use a old plastic bag like the ones in the kit before assembly, then stuff the motor in push it through the plastic, secure the hole with tesa and then secure the other end too, now you could easily grind that spot on it, and it IS better to have one, although it functions pretty well on non spot surfaces too !!
(10th is OK without, but above i will recommend it as a better solution)

[bomb-proof]

Its too high of a risk for me to attempt to do as little as possible to "get by". When the pinion slings off, the motor is at higher risk of grenading a rotor due to no load. Do it the right way instead of the easy way. You could probably tape it on instead of using a set screw as well, but I dont recomend that either.