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They are off the shelf... I saw on Youtube a guy tempering at 400* in his home oven. He baked the items for a few hours @ 400* and had good success, I was planning on trying this method if you recommend it? I think it kind of normalizes the material right? I am fairly familiar with cryo treating stuff, as I used it in my engines and such over the years, but I never did it myself. I DO know they bake the parts and slowly bring down the temperature after they cryo it to normalize the part.
Hey also, when you are setting up the spacing on the gears, the "pitch diameter is the number you use correct? so that if I have a pitch diameter of .800" and 2.400" I would set the center line of the axles they ride on at 1.600" apart correct? Or do I need to add the gear lash clearance to that?
You will not like the price of a non contact thermo as the ones that will read high enough are pricey. Be cheaper to just have a small batch heat treater do it for you. Why not investigate a trade/tech school in your area that has the capability to do small runs of custom parts as part of the curriculum? I'm thinking that is best bet for you to get a quality part-cheap. The reason I say this is because it is unlikely that you will find a production shop doing any runs of 1144 of similar size/mass as your gears. The actual process of heating times/temp and quench technique they use may result in less than desired results. Maybe. Maybe not.