[ferrari77]

Does anyone know a good place to get flexible shaft couplings, also called helical beam couplings?

I need a 8mm to 1/4'' (8mm to 6.35mm) flexible shaft coupling

I found a few on amazon but they all ship frmo china and take around 2 weeks or more to get here
McMaster has them and ships fast but they are $45 instead of around 10 on amazon

SDP-SI doesnt carry the right sizes

Shipping speed is of the most importance but preferably with a reasonable price

Thanks