Helpful Information U-Joint ID (pdf) Coupling Shaft Design (pdf) Attaching Flange Yokes (pdf) Companion Flanges (pdf) End Yokes with Spined Holes (pdf) Double Cardan C.V. Design (pdf) How to: How to Measure Driveshaft Angle w-o Protractor (pdf) Calculate U-Joint Operating Angle w Protractor (pdf)