Where did you get that Rotamax coupling Who makes them

Steve Brazil

That is a German product Steve.
Here is the web site http://www.centa.info/

Here is the coupling used on the Rotamax.

Paul Lamar

Sorry for earlier message . Have a look at www.pegasusautoracing.com
part
#
1470 HD $149.99

Peter Whitehead

This coupling seems to be a different design from what Rotamax is
using. I
am using this design in my single rotor. It came with the redrive from
Hirth. I believe it is made in Italy.

Has been holding up so far up to 6200 RPM under power.

Richard Sohn
N2071U

Hi Guys;

There are a ton of these available.
Do a google search on the words "Guibo" and "BMW". Several other car
manufacturers use similar donut designs.
There are also engineered equivalents for industrial equipment with
engineering design data.

Cheers
Cary

LoveJoy and Centaflex are the major players for drive line doughnuts.
Bill Jepson