For a part of our robot we want to directly mount a neo to a 0.75in steel shaft. To do so we need to cut a 8mm hole with 2mm key way for said neo shaft. Does anyone have any experience doing something like this, or have any alternative ideas as to how to go about mounting said neo to said shaft.
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Without knowing more about your application, my favorite way to do this is to drill the 8mm hole into the end of the shaft. cut a horizontal slit into the end of the shaft through the hole about an inch long or so, and then use a 3/4" shaft collar to clamp the two halves of the shaft to the NEO output shaft.
If you can provide more details about your application there are likely many alternatives to accomplish your goal.
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^^ I like the idea above best.
But if you want an actual keyed hole to match the motor shaft, it can be cut using a keyway broach kit.
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Thank you for the input, while brainstorming we found that using set screws was the most realistic solution for our mounting situation. For those asking the shaft was going to be our main intake. We wanted the motor to be directly mounted to the intake shaft to keep it as balanced as possible since it will be on two moving arms. (Sorry to repeat) We found that the best way to do this was to mill a flat section onto the rod where two holes could be drilled and inset so that set screws could be set through the shaft into the neo drive shaft.
You can also try a shaft coupler like this one. that connects an 8mm shaft to a 12 mm shaft. You would have to drill the 12mm end out to something like 1/2" then find a second one to go from 1/2" to 3/4".
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