2PCS 200mm Linear Motion Rod Shaft Guide & （200mm）8mm Lead Screw & 4PCS SK8 Shaft Support & 4PCS SCS8UU Bearings & 2PCS KP08 & 2PCS Flexible Shaft Couplings
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The parts for these parts don't have drawings, so you need to purchase them, reverse-engineer them, then install them That's what I did I worked as an engineer.
I think the 8 mm is just fine. The screw and shaft are both 8 mm in diameter.
Selected User Reviews For 2PCS 200mm Linear Motion Rod Shaft Guide & （200mm）8mm Lead Screw & 4PCS SK8 Shaft Support & 4PCS SCS8UU Bearings & 2PCS KP08 & 2PCS Flexible Shaft Couplings
are smooth, and the stepper motor drives the screw fine, and the screw has four threads so it drives pretty fast. I am using a NEMA 17 stepper motor to drive it, and at 200 steps per revolution, it moves the table 1/25' per revolution. Adding cross members so all the pieces can be fixed together would be the best thing for this kit. Also, it would be helpful to have another eight M4 x0s. The screw has seven threads.
While the set screws for pillow blocks bearings are tightened sufficiently, the shaft does not fit tightly enough over them due to rubbing on the seal. Linear bearings are atrocious, as is the unit's design.
There might be some cleaning to be done, but you'll need a pair of tweezers for the.
There were no differences between the parts described and the actual parts.
There were parts in the kit that were far superior to mine, so I was able to use a few.
It's very good.
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