A pump fitted with 50mm bore ball bearings uses oil whose viscosity ranges from 100cSt at cold pump...

Question

A pump fitted with 50mm bore ball bearings uses oil whose viscosity ranges from 100cSt at cold pump start-up to 7.5Cst when running at maximum speed and load. If these viscosities are the safe limits for the oil, specify the maximum start-up speed and the maximum running speed you would recommend for the pump.

Robert · Accepted Answer

Maximum start up speed 
   
  
 
 
 
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Calculate maximum running speed 
   
  
 
 
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A pump fitted with 50mm bore ball bearings uses oil whose viscosity ranges from 100cSt at cold pump start-up to 7.5Cst when running at maximum speed and load. If these viscosities are the safe limits...

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