Wanted to make a Delrin 120 tooth idler gear for my PM14x40 lathe. A few years back i made a small 24 tooth spur gear for a 3-1 multi-machine (Mill/Drill/Lathe) so i could add a thread dial, that gear was made by a single point cutter ground to the correct angle and looked kind of like a fly cutter... For this 120 tooth project i wanted to make a multi-edge cutter that would create an Involute Gear. Did alittle research found the radius which i needed and did the following:
Sorry, dont have alot of pictures for this project.
HSS cutter i used to form the gear cutter.
Before relief was ground (in the last image you can see the form of the cutter in the shadow it casts just to the right of the blank)
After relief and hardening
Things which i will do different next time:
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