This forum my last hope?

[tommyheadleycox]

Originally Posted by BrianG

10T @ 7mm diameter = 43.54p (Mod 0.58). Calculated from http://scriptasylum.com/rc_speed/gear_calc.html

Not much help, but you can get an idea...

On the contrary, this is a huge help. The available literature was confusing on how to calculate the modulus. This url converter is a big help. I knew that the modulus was close to 0.6. But it's better to know that it's exactly 0.58. That's of course assuming the original diameter was 7 mm. But if it was 7.5mm, then I know that the modulus is 0.63. If I need to, and if they're available, I can order pinons in 0.58 and 0.63 modulus.

Again, many thanks,
Tom