gear combination

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Martin_

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I want to know if I can use a 14 tooth pinion with any 48 tooth spur or I have to buy a specific 48 tooth meshed for the 14.

Actually I can play with 15 and 16 tooth, but how about the 14?
 
Ok, I understand what you said, 16+48=64, however there is rules exeption for the 16/48 ratio, I actually run with 15/48 witch give 63, both 15T and 16T pinion have the same diameter, but the involute shape is different...... blablabla...

What I really want to know is if the 14T pinion are in the same familly? I mean 14T, 15T, 16T with the same 48T spur.

I ask because I'm ready to buy the 14T, but if it will not fit my 48T spur, I will don't buy it and go to another way.
 
Martin_ said:
Ok, I understand what you said, 16+48=64, however there is rules exeption for the 16/48 ratio, I actually run with 15/48 witch give 63, both 15T and 16T pinion have the same diameter, but the involute shape is different...... blablabla...

What I really want to know is if the 14T pinion are in the same familly? I mean 14T, 15T, 16T with the same 48T spur.

I ask because I'm ready to buy the 14T, but if it will not fit my 48T spur, I will don't buy it and go to another way.
Click to expand...

don't know then mate :blush:
 
If you run the 14 with a 48, the pinion will not contact the spur. You would need a 50 tooth spur, I don't know if anyone uses a 50?

Like Dwarfy said, must equal 64. You cannot set the gear mesh with the FG's like you can other R/C's.

But like BTB said, you can play with the layshaft gear or the diff gear. They make a few different sized gears for the on and off road vehicles.
 
Thats perfect, this is what I wanted to know.

Problem is that it's not on the layshaft, but on the clutchbell, this is a two speed steel built-in mechanism (aftermarket unit) for now 15/48 1st and 20/44 2nd, and even if I could play with the 1st mesh, it would be impossible because of the second gear mesh.

As for the layshaft set-up, I bought last year 17/46 from the same guy, and now I moved the differential to install 20/46, this is why I want a little more torque from the 1st speed.

I know there is 22/42 ratio 2nd gear instead of playing with the layshaft ratio, but I ask the guy to buy it and it's not available for now as a built-in steel mechanism.

http://www.gotpetrol.net/steel-gears-vt4838.html
 
after reading the above posts ive been thinking.. yeah yeah ive got a head ache now..

ive been stripping spurs ( plastic ) just about every run and then i upgraded to a steel 48 spur and the diff went pop... but ive been running a steel 18 tooth pinion..

i asume it would be more reliable to run a steel 16 pin. with my 48 steel spur..?? if any of that makes sense.....lol
 
shaggy said:
after reading the above posts ive been thinking.. yeah yeah ive got a head ache now..

ive been stripping spurs ( plastic ) just about every run and then i upgraded to a steel 48 spur and the diff went pop... but ive been running a steel 18 tooth pinion..

i asume it would be more reliable to run a steel 16 pin. with my 48 steel spur..?? if any of that makes sense.....lol
Click to expand...

I run a plastic spur with no problems. All you have done by fitting a metal spur is strengthen the weak point and moved the problem to the next weakest point ie the diff. Yes you are correct that a 16T will work with the 48T spur. The 18T pinion would have been forcing the mesh on the 48T plastic spur and chewing it up as you have experienced and creating alot of heat. May be worth checking the bearings on your layshaft have not been damaged with the heat. If you want to run the 18T pinion you will need a 46T spur.
 
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