Thread: Some of you make chips bigger than these gears...

Had to set up a hobbing job today for some tiny brass helical gears; 2 mm bore, 5.1mm OD, 3.5mm wide including shoulders, 15 teeth.

No fancy CNC, just a Swiss mechanical computer

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Back end gear train; spindle speed on the right, indexing on the left

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Front end gear train: basic feed on the right, differential feed for helicals on the left

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5° 51'...or as close as I can figure it without a vernier scale. A few minutes either way on something like this isn't going to make much difference

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It's a tight fit in there with the deburring tool

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1 down, 2999 to go

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And with some swarf from the lathe across the walkway for scale

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Attached Images

• PXL_20201123_012651196.jpg (207.5 KB)
• PXL_20201123_045522522.jpg (85.7 KB)
• PXL_20201123_045114964.jpg (174.5 KB)
• PXL_20201123_045259976.jpg (108.9 KB)
• PXL_20201123_045139613.jpg (253.7 KB)
• PXL_20201123_043446917.jpg (254.8 KB)
• PXL_20201123_013340540.jpg (241.4 KB)

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