DIY gear we use but don't sell, no warranty expressed or implied.
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(Note: You don't have to use a touch screen with Centroid CNC12, you can use a mouse instead of touching the screen, just be sure to use a 1920x1080 resolution monitor if you go with a touch screen LCD or a regualr LCD monitor!)
Can't build a machine without this stuff! Use on axis drive pulleys at the motor shaft and the ballscrew/rack end. Put a dab on the inside of the pulley and install it. This stops the pulley from working loose over time (set screws and flats can't take long term CNC use..they work themselves loose, this stops that!) Its always best to have a keyway that is fitted perfectly but 620 really does the job. Also used in sleeving shafts to increase thier diameter.
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