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March 18, 2011
about 8 years ago
The shaft has a 1mm pitch. It's also stainless steel. That's because it runs through the center of the rotor magnets; if the shaft were made of a magnetic steel, it would become magnetized over time and that's usually a bad thing.
In searching for shaft material, I found no source of M5 X 1 stainless threaded rod, though I did find an alleged source of plain steel rod who didn't respond to my inquiries. You can have stainless rod threaded by a machine shop, but it's horrendously expensive.
It would be very useful for SparkFun to contact the motor vendor about the price to order custom lengths, perhaps a meter, then let us know how to order shafts from them.
My motor is tired of being a paperweight.
No public wish lists :(