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running clearence api 610

running clearence api 610

Please advise what is the minimum running clearance according to API 610, for example on table write minimum running clearance is 0.016 inch for rotating diameter between 4.00-4.499 inches. Is it mean the clearance no allowed more than 0.016 or should be more than 0.016 inch

RE: running clearence api 610

more than 0,016 inch

RE: running clearence api 610

When considering running clearance, at a minimum, I would consider sixfold parameters: shaft speed, type of bearing in which the shaft is running, allowable shaft mechanical runout, allowable bearing concentricity, allowable misalignmemt, expected shaft temperatures and expected lube viscosity & oil Delta Temperature. For example, a hot running clearance is not the same as a cold running clerance.

The 0.016 IN spec is at best generic. For example in a sleeve bearing at 1200 rpm the 0.016 IN running clearance would be on the high side however if the shaft speed is 14000 rpm the 0.016 clearance is excessive.  

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