shaft key

[A_123]

if there is loose in the key between shaft and impeller, that will cause any vibration or unbalance for two-stage pump. as you can see the picture.

 

[LittleInch]

Yes. I agree.

What is the question?

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[A_123]

Is there any affect of shaft key looseness? any limit or standard? how to solve it?

 

[MikeHalloran]

In general, if the key is loose, and you are not restricted from doing so, install it with a dab of Loctite PST, which should prevent it from wobbling around too much without making it impossible to remove.



Mike Halloran
Pembroke Pines, FL, USA

 

[Artisi]

Why is it loose?
Does it have excessive side clearance?
Is the key or keyway worn?


It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)

 

[EdStainless]

In larger machines the key is often a pair of tapered keys so that they can be tight.
Loose keys are not good, and they will only get worse.

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P.E. Metallurgy, Plymouth Tube