Fastener failure in huge pump cover.
Fastener failure in huge pump cover.
(OP)
I have a huge mud pump that has a big crank shaft case cover that installed 35 angeld degree. Originally, this cover is attached by 22 studs. As it is hard to install the cover we change those studs to standard fastener bolts. With 6 month later, we observed that most of the fastener bolts are fractured from the head & body joint. I would suggest to reuse the old design attachment. Could you please advise me?





RE: Fastener failure in huge pump cover.
RE: Fastener failure in huge pump cover.
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.)
RE: Fastener failure in huge pump cover.
What is your 'standard' bolt? It may not have been the same strength as the studs.
Ted
RE: Fastener failure in huge pump cover.
A nut on a stud will be able to shift slightly while a head on a shank will not.
We used to test high strength bolts and tried all sorts of tricks to get failures in the threads instead of just breaking heads off.
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Plymouth Tube
RE: Fastener failure in huge pump cover.
hydtools,
They are the same grade type of strength.
Additional Information:
The main crankshaft bearing cover is attached by two big bolt 1 1/2" head size. Usually, I get one of them broken every 6 month PM. Consequently. the load in the main bearing will be transferred to the structure which it attached to this bearing cover meanwhile it trys to push the main crank shaft cover.