AGMA 9000 Coupling

[JL2024]

When we refer to AGMA 9000 class 9 coupling, does that by default means flexible couplings already? One pump spec defines a three- piece rigid coupling while it states that “coupling assembly shall be in compliance with AGMA 9000 class 9 and achieve 4 mils total indicated runout on the shaft”. The spec also says that “the coupling shall have precision register fit and match- marking to allow repeated assembly without realignment”. Not very clear about the spec intention, should flexible or rigid coupling be used? Thanks in advance.

 

[geesaman.d]

AGMA 9000 is balancing of flexible couplings only. I suspect you can apply AGMA 9000 balancing methods to a rigid coupling assembly but I don't see why you wouldn't just keep it simple and apply ISO 1940 / 21940 to your rigid components.

 

[JL2024]

Hi Geesaman.d, really appreciate your reply. I would use ISO 1940/21940 instead.