![]() ![]() The graphic curve will be updated as well. ![]() All other values will be re-calculated automatically. Just put your values (either imperial or metrical) in the appropriate fields below and press ENTER. The use of any of the calculators’ results is at the user’s sole risk. The calculator below is for informative purposes only. You can calculate pre-filled values of oil classified by ISO 3448 with grades VG22, VG32, VG46 or VG68 (at viscosity Index = 100) or enter specific values for any other oils. These data is enough to determine kinematic viscosity at any other values of temperature and as well Viscosity Index. Edit:If you must consider an automotive gear oil due to availability and price issue, please consider a 85W140 with a KV40 C closer to 242 cSt. Расчёт индекса вязкости по кинематической вязкости`)Īny mineral oil is supplied with the specification of kinematic viscosity values at two different temperatures, usually at 40☌ and at 100☌ (or at 100☏ and at 210☏). No, you can’t use automotive SAE 75W90 whose KV40 C is typically 100 105 cSt, i.e equivalent to ISO 100 industrial gear oil and it is 2 viscosity grades thinner than that of ISO 220. the Viscosity Index (VI) by the formulas specified in ASTM D2270 (`Standard Practice for Calculating Viscosity Index from Kinematic Viscosity at 40 and 100☌ 1`) or in ISO 2909 (`Standard Practice for Calculating Viscosity Index from Kinematic Viscosity at 40 and 100☌ 1`) or in ГОСТ 25371-2018 (`Нефтепродукты.the kinematic viscosity values, depends from temperature, calculated by the formulas specified in ASTM D341 – (‘Standard Practice for Viscosity-Temperature Charts for Liquid Petroleum Products’).This is the ratio of the time of flow of 200 ml of fluid to the time of flow of 200 ml of water at the same temperature in a standardized Engler viscosity meter.The interpolation calculator provided below is used to determine: For higher viscosities, SSF (Saybolt Seconds Furol) is used. This is the time for 60 millilitres (ml) of fluid to flow through the calibrated orifice of a Saybolt Universal viscometer at a specified temperature, as prescribed by test method ASTM D 88. It is most usually encountered as the centistokes (cSt), equal to 0.01 stokes. One stokes is equal to the viscosity in poise divided by the density of the fluid in grams per cubic centimetre (g This is the CGS unit, equivalent to square centimetres per second (cm2 s–1). KINEMATIC VISCOSITY Stokes (symbol: St) + centiStokes (symbol: cSt) TABLE OF EQUIVALENTSġ pound-force second per square inch (reyn) One poiseuille is 10 poise or 1000 cP, while 1 cP = 1 mPa 20 to 100 cSt (5) 0.8 to 4 cSt (4) 100 to 500 cSt (4) 3 to 15 cSt. It is sometimes referred to as the poiseuille (symbol Pl). This is the SI unit of viscosity, equivalent to newton-second per square metre (N Pascal-second (symbol: Pa.s) + milliPascal-second (symbol: mPa.s) SOME TYPICAL DYNAMIC VISCOSITIES (cP at 20☌) Many everyday fluids have viscosities between 0. It is the viscosity of a fluid in which a tangential force of 1 dyne per square centimetre maintains a difference in velocity of 1 centimetre per second between two parallel planes 1 centimetre apart.Įven in relation to high-viscosity fluids, this unit is most usually encountered as the centipoise (cP), which is 0.01 poise. Named after the French physician Jean Louis Marie Poiseuille (1799 – 1869), this is the CGS unit of viscosity, equivalent to dyne-second per square centimetre. Go to Viscosity Units Converter | Viscosity Comparison ChartĭYNAMIC VISCOSITY Poise (symbol: P) + centiPoise (symbol: cP) ![]()
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