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← TechnologyWhich outcome occurs when lubricating oil viscosity is too low during a CNC grinder operation?
A)Hydrodynamic lubrication breakdown✓
B)Reduced workpiece thermal distortion
C)Increased wheel profile sharpness
D)Enhanced swarf removal efficiency
💡 Explanation
Hydrodynamic lubrication breakdown arises because lower viscosity reduces the oil's load-bearing capacity, leading to increased friction and wear from boundary lubrication. This failure degrades surface finish due to lack of proper fluid film, therefore causing the breakdown rather than improved heat transfer or swarf removal.
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