[AUKURAS]

Hi guys,

What type of couplings (motor-shaft) did you find best? I see now there's lot's of different types. For example:

Coupler GND zinc alloy flexible shaft couplings for micro motor and encoder coupling servo shaft|Shaft Couplings| | - AliExpress

GND coupling metal shaft manufacturing aluminum Clamp torque generator bellows servo motor spring quick camlock Bellows Coupling|Shaft Couplings| | - AliExpress

Two jaw D20L25 coupler D20 L25 aluminum plum flexible shaft BW coupling motor connector solid rubber pad / 6 / 6.35 / 8/10 / mm|Shaft Couplings| | - AliExpress

CNC Flexible Coupling Shaft Coupler Stepper Motor Connector D25 L30 Jaw Aluminum Alloy|Shaft Couplings| | - AliExpress

Is there any point to buy more expensive?
Regards

[Jim Dawson]

Of the inexpensive choices for small motors I like these couplings https://www.aliexpress.com/item/3286...a-fbc4f205c246

[Al_The_Man]

If choosing Helical couplers for servo motors, I would really recommend stainless over aluminum, the latter tend to fail on motors that tend to be on the more powerfull end of the scale.
Even if using steppers.
I reserve the aluminum versions for encoder coupling.
Al.

[dazp1976]

I use the plum ones. I hate the flexibles.
I've had some dodgy plum couplers sent in the past though.

Would be nice to have oldham but they cost. You can get the inserts seperately which is handy if you can make your own clamp units.