Pinion 38-48 pich?

[carcueza]

Hello.
I have 540´s motors in my RS10 and I would like to change the pinions but I don´t know what to buy because there are two sizes 38 pitch and 48 pitch!! What is the correct size for the RS10´s transmision?

Thanks!!!

[Matt12]

i believe there 48 pitch

[CPE MT]

48 metric pitch.

[d-ranger]

ive been using berg pinions for about a month now with no problems. i also have 540s and i still have the plastic gears.

[tommy8370]

If you have a digital caliper you can calculate the pitch. You can also buy pitch gauges. To calculate pitch you take the # of teeth and divide it by the pitch diameter. The pitch diameter is measured from the center of each tooth. Easiest way is to take the # of teeth add 2, then divide that by the OD of the gear. Metric measurements are designated by Modules, or Mod.... 1 MOD = 25.4P, 2 MOD = 12.7P. So if there is a P designation then its unified (standard), not metric. The only time it doesnt "really" matter if its metric or standard is when you interchange between 32P or 0.8 MOD, for they are close enough for our applications.

[bigman32]

looks like 48p to me

[cumminsontherocks]

Originally Posted by tommy8370

If you have a digital caliper you can calculate the pitch. You can also buy pitch gauges. To calculate pitch you take the # of teeth and divide it by the pitch diameter. The pitch diameter is measured from the center of each tooth. Easiest way is to take the # of teeth add 2, then divide that by the OD of the gear. Metric measurements are designated by Modules, or Mod.... 1 MOD = 25.4P, 2 MOD = 12.7P. So if there is a P designation then its unified (standard), not metric. The only time it doesnt "really" matter if its metric or standard is when you interchange between 32P or 0.8 MOD, for they are close enough for our applications.

very cool! good info!

[carcueza]

I´ve just bought a pitch guaget !! It only cost $4!!
Thanks