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Dumb question, what does the # mean or designate on different gear cutters. I understand the pitch, I just don't understand the difference between a #7 48 pitch gear cutter compaired to a #8 gear cuttter. I"m sure its somthing really simple, but I am in the process of purchasing some gear...

Well, with winter just around the corner and things starting to slow down I thought it was time to start my next model engine project. After a long time of contemplating on what to build, I finally decided to go for my first internal combustion engine. I scoured the internet for plans and came...