uxcell 8mmx14mm Clamp Tight Motor Shaft Double Diaphragm Coupling Coupler
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These parts have made me very happy. On my laser engraver, it's used to replace a cheap brass coupler. I like how the machined cuts between the two ends add flexibility and spring action if things are slightly out of alignment.
I'm hoping that 10000RPM will be of assistance.
You can find full specifications for the flexible coupling by searching "uxcell diaphragm coupling" on Amazon.
They're made of a combination of aluminum alloy and stainless steel.
Selected User Reviews For uxcell 8mmx14mm Clamp Tight Motor Shaft Double Diaphragm Coupling Coupler
I suppose it would have been nice if you had read that the diameter was 35mm wide, but it clamps tightly and does its job otherwise.
After a spiral coupling on my CNC router self-destructed, I decided to try a few of these. They're a lot bigger and have a lot of clamping power. They'll probably last a long time, in my opinion.
These were used to power my CNC mill's ball screws. To fit my servo motor, I had to bore out one end to 5/8", but everything else is true and concentric, with no backlash. More will be purchased in the future for other projects.
I've tried a variety of online couplers, including the "spider" and "coil" types, and these are by far the best, with no wobble. They are a little more expensive, but they are well worth it.
It was exactly what I expected, arrived quickly, and was well constructed.