![]() ![]() High-shear viscosity (10/s) at high temperature of 150 ☌ - HSHT viscosity. Kinematic viscosity at 40 ☌ and 100 ☌ - low-shear viscosity - determined according to ASTM D445, where the alternative method according to ASTM D7042 delivers comparable results. Lubricants of a given ASTM or BSI grade are slightly more viscous than lubricants of the corresponding ISO grade. Automotive Lubricant Viscosity Grades: Engine Oils SAE J 300, Dec. To find the exact cp of your fluid: cp cSt x (weight per gallon x 0.120). To find the exact cp of your fluid: cp cSt x (weight per gallon x 0.120). Viscosity and Specific Gravity Values AVAILABLE IN: English Viscosity Values and Specific Gravity Centipoise centistokes x specific gravity where specific gravity is assumed to be 0.8 (except for water). Viscosity grade numbers of the ISO are the same as those of ASTM (The American Society of Testing and Materials) and BSI (British Standards Institution), with the difference that the viscosities for the ISO grades are measured at 40 ☌, while those of the ASTM and BSI are measured at 100 ☏ (37.8 ☌). AVAILABLE IN: English Viscosity Values and Specific Gravity Centipoise centistokes x specific gravity where specific gravity is assumed to be 0.8 (except for water). Viscosity table/chart as per ISO 3448 for industrial fluids. The ISO system is primarily used for hydraulic oil, industrial oils, such as turbine oils, compressor oils and others. ISO VG are based on kinematic viscosity of the lube oil/fluid at 40☌. ISO viscosity classification system or ISO Viscosity grades also called ISO VG contains 18 viscosity grades. ![]() Lubricant viscosity performs a prime role against friction and wear. Settled in 1975 by a joint committee of International Standards Organization (ISO), American Society for Testing and Materials (ASTM), Society for Tribologists and Lubrication Engineers (STLE), British Standards Institute (BSI), and Deutsches Institute for Normung (DIN). Viscosity Converting Chart A converting table between viscosity units like Centiposes, milliPascal, CentiStokes and SSU Centipoise (CPS) Millipascal (mPas) Poise (P) Centistokes (cSt) Stokes (S) Saybolt Seconds Universal (SSU) 1 0.01 1 0.01 31 2 0.02 2 0.02 34 4 0.04 4 0.04 38 7 0.07 7 0.07 47 10 0.1 10 0.1 60 15 0.15 15 0. A viscosity grades classification or standard known as the ISO VG (International Standards Organization Viscosity Grade). For engine oil check SAE J300 and SAE J306 for gear oils. ISO-VG (Viscosity Grade) classes apply only for industrial lubricating oils. Learning more about your specific application can help deliver extra value and performance, while avoiding unnecessary expenses.Industrial fluids kinematic viscosity according to ISO 3448, DIN 51519 The centistoke (one hundredth of a stoke) is more generally used. We'd recommend looking also at oils by category (such as Spindle, Way, Gear, and Hydraulic oils) and consider between synthetic and conventional oils. In the metric system, the unit of kinematic viscosity is the square centimeter per second or the stoke. Translating the viscosity is a good first step and can be sufficient for most general-purpose applications. This is a good approximation for most oils, but will lead to a small error when converting between ISO/AGMA and SAE for high Viscosity Index oils. The chart assumes the oil has a Viscosity Index of 95. Oil gets thinner according to its Viscosity Index, and the chart is calculated with a specific Viscosity Index (VI 95 default) ISO VG measures oil at 40✬ and a given range to +/-10% of their stated value, so ISO VG 100 oil will have a viscosity between 90 and 100 cSt at 40✬.ĪGMA has redefined its grades to align with ISO standards, so they line up exactly. Oils grades that are on the same horizontal line (with the correct Viscosity Index) on the chart are equivalent. Several organizations (ISO, SAE, AGMA) have created competing standards to define oil viscosity ranges, but most of them mean the same thing. ![]()
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