PrintrBot LC small extruder gear
by WildWill, published
This is a slightly improved version of the PrintrBot LC extruder small herringbone gear. I removed artifacts from a defunct set screw hole, and replaced some missing vertices in the teeth. Same gear, better mesh, less defects.
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The hole for the shaft is purposely slightly undersized, as to allow for reaming/drilling for a precise fit to the motor shaft. You will need either a 5mm reamer, or drill, or a #9 reamer or drill, or you could also use a #8 reamer or drill. In order to make this gear turn smoothly, you should perform this on a drill press or lathe. Or, do it by hand carefully. ALWAYS WEAR SAFETY GLASSES WHEN DRILLING ANYTHING.
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