This forum my last hope?

[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...

[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

[BrianG]

Originally Posted by tommyheadleycox

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

Cool, glad it might help. Along with just the pitch/modulus, also pay attention to the tooth geometry (pressure angle), as there can be variation there even with identical pitch gears. I have a feeling a very large/detailed picture will be needed for sdp-si to make sure they provide the exact match.

[simplechamp]

Originally Posted by tommyheadleycox

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

The Duratrax Vendetta 1/18 RC car uses Mod 0.6 pinions if I remember correctly, but I believe the stock bore is 2.3mm. Might be worth a try looking at those

[mistercrash]

Brian's website shows that if the gear was originally 7.2 mm then the pitch would be mod 0.6. That's 48 pitch isn't it? I think that might be it.

Maybe look in the slot cars area?
http://www.ncphobbies.com/arp-1/24-g.../arp4810strts/

Or could this fit?
http://store.rc4wd.com/10-Tooth-48-P...ear_p_597.html

Or maybe find something on ebay?
http://cgi.ebay.com/Losi-Night-Crawl...item20b6214e1b

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...

Man I love scriptasylum. Brian you have done the RC community something that they will for ever be in debt to you for. Couldn't count the number of times I have used it and it just seems to get better with more features and calculations.

[magman]

Originally Posted by BIG-block

Man I love scriptasylum. Brian you have done the RC community something that they will for ever be in debt to you for. Couldn't count the number of times I have used it and it just seems to get better with more features and calculations.

+ 1 as well. I direct my friends to the link constantly when they have a question