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Senior Member
Originally Posted by
Nicholas R
I'm not sure what you mean by mirror phased, but in general, universal joints should always be installed 90° apart. Unlike constant velocity joints, universal joints do not translate rotational motion at a constant velocity when the joint is at an angle. The greater the angle on the joint, the more the output shaft will speed up and slow down as the input shaft is rotated at a constant speed. This effect is greatly reduced by having 2 universal joints that are offset 90°, and completely eliminated if both joints are operating at the same angle (shaft angle).
If you do not put them 90° however, the effect can be even worse (meaning the rotation of your wheel will be inconsistent with the amount your tires turn, sometimes too much, sometimes too little).
This this 90° offset of universal joints is the inspiration between the double cardan CV joint.
Call Borgeson and let them know.
http://www.borgeson.com/Designing/angles.html
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