Disengage and rotate drive shaft

[jcalow]

I have a motor driving a 2:1 ratio gearbox which drives two drive shafts. I want to be able to stop the machine and manually disengage one of the shafts, rotate it through approx 10 degrees and then re-engage. Could anyone point me in the direction of a device or coupling that is capable of doing this? Many thanks in advance for your help.

 

[MintJulep]

Lacking any specific information to go on, start here.

 

[Compositepro]

I sounds like you are searching for a phase change coupling

http://www.candycontrols.com/PhasingHub/PhasingHub.htm