1920 Shaft size?
 

Hey guys do you know the shaft size of the 1920? I was wondering if i can use standard 1/8 bore pinions with it..

I believe so....I'm not sure. It's either that or a 4mm shaft...

According to this, it's 3.17mm (0.1248")...

Yeah, you can choose between 4mm and 1/8th"

I use to have a 1920/8 Lehner motor....and they come with a 4mm shaft...unles you S/O them in the 1/8 shaft

s/o ?

S/O means Special Order....in the retail business....sorry.....alos B/O means Backorder in the same business as well

Sorry, i didn't understand it because you used it as a verb. that confused me..

Welcome to AMERICA, we can't even speak our own language properly! But Shayne is right, they are 4mm

that is very true....we have so many acronyms for words.....it isn't even funny.......i guess you can say we are sorta lazy in a sense or it is just easier is all....

Try to speak dutch, you will thank the US for it's easy language.. LOL

LOL @ Rene... I wonder if mike has some 1/8 sized 1920s.. thanks guys.

you can see if mike can get just the shaft from Bk and you can replace it your self or contact bk and order direct from them....replacing the shaft is real easy anyways.....

Still, if i can get it standard with the 1/8 shaft, its alright, besides if i had to switch the whole shaft id also need some bearings.

The bearings won't change. It is just smaller after it passes the bearing.

Yeah, actually they eat up some material from the shaft to reduce its size from 4mm to 1/8". And if you give the Mamba Max motor a look, you'll find that it actually has a 4mm shaft with a reduced size after it comes out of the bearing.

Also, you can actually ask Mike to bring you a version of the motor with this shaft diameter.

What turn are you gonna take? 6T or probably 8T?

Gonna try 6t.

So you'll be near 38000rpms and that is quite similar to a 11T motor. Start from 19t pinion and I'm sure you'll hit the sweet spot with a 21-22t pinion.

This motor should be crazy! Hope she runs cool without heatsink (limited space for a heatsink in b4.)

The 1930 pushed a emaxx around with out alot of heat issues. I sure it should push a b4 no prob.