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At Falk Corporation. The machine and recorder are manufactured by Illinois Toolworks of Chicago. The machine is capable of checking the accuracy of involute profiles on pinions or gears up to 36 inch outside diameter. Pinion description: 20 teeth, 1 1/2 DP, 24 inch face, 5 degree helix angle, single helical, full depth mill type teeth, right hand helix.

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