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Kinematic viscosity of lubricant oil is an atmospheric variable defined as the ratio between the dynamic viscosity μ and the density ρ of the fluid. It represents the fluid's resistance to flow under gravity.
The calculator uses the formula:
Where:
Explanation: The formula calculates the kinematic viscosity by dividing the dynamic viscosity by the density of the lubricating oil.
Details: Accurate kinematic viscosity calculation is crucial for determining the proper lubrication characteristics in sliding contact ball bearings, ensuring optimal performance and longevity of mechanical systems.
Tips: Enter dynamic viscosity in Pascal Second and density in kg/m³. Both values must be positive numbers greater than zero.
Q1: What is the difference between dynamic and kinematic viscosity?
A: Dynamic viscosity measures a fluid's resistance to flow when an external force is applied, while kinematic viscosity is the ratio of dynamic viscosity to density and represents the fluid's resistance to flow under gravity.
Q2: Why is kinematic viscosity important for lubricants?
A: Kinematic viscosity helps determine how well a lubricant will flow and provide protection in mechanical systems, particularly in bearings and other moving parts.
Q3: What are typical units for kinematic viscosity?
A: The SI unit is square meters per second (m²/s), but Stokes (St) and centistokes (cSt) are also commonly used in engineering applications.
Q4: How does temperature affect kinematic viscosity?
A: Kinematic viscosity typically decreases as temperature increases, which is why viscosity measurements are often specified at standard temperatures (e.g., 40°C or 100°C).
Q5: When should this calculation be used?
A: This calculation is essential for engineers and technicians working with lubrication systems, particularly when selecting the appropriate lubricant for sliding contact ball bearings and other mechanical components.