Crushing, Screening & Conveying

Crushing, Screening & Conveying

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Repairing of the spider tapered internal bore - 60" x 89" -Primatry Gyratory Crusher (1 reply and 1 comment)

Eder Figueiredo
10 months ago
Eder Figueiredo 10 months ago

Dear Friends,

I working on a solution for repairing the spider tapered internal bore of our 60” x 89” primary gyratory crusher , as it has loosed its fit interference due excessive wear and can not hold the spider bushing. The results are frequently broken bolts and long shutdown of the crusher.

Many companies have proposed to weld and machine the tapered internal bore in place without the needs of transporting of the spider for a workshop.

My experience shows that the best and more accuracy procedure is to machine it in a vertical lathe as we need to reach very tight dimensional and geometric tolerances.

What are your opinions? Have any of you had this kind of experience?


10 months ago
SmartDog 10 months ago

Can it be repaired in place, yes.  Will it be a successful repair, it depends.  Of the people who say they can repair it in place, do they have any experience in doing so and if so what do the customers think of their repair job?

As you point out this is a job that takes a fairly tight precision for a long life.  Some of the repairs were probably to extend the life until a new unit can be installed, or the operation was nearing its end of life anyway. 

If you are looking for a long life then doing it right makes sense.  If you are only looking for a few more years than it is a different story.

Eder Figueiredo
10 months ago

Thanks my friend. I really appreciate your comments.

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