optimum mh-28v bench mill replacement combination gear
thingiverse
optimum mh-28v bench mill replacement combination gear The gears based on the reference size of the bore was dimensionally referenced and I did some experimentation to conclude that the Module of the gears is 1.5 (metric) and the pressure angle is 20deg (the overlay shows a very close visual match of the tooth profile). I calculated the rest of the dimensions based on the referenced image such as the height of the undercut (5mm), height the 56T gear section (11mm), height of the 31T gear section (10mm), keyway size is 5mm. I also modeled a gear without the undercut section by extending the 31T gear down to the face of the 56T gear section. Just incase since that will be easier to print (avoiding any overhangs or using supports).
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