![]() If you’ve ever felt the pressure of choosing the right hydraulic oil for your machinery, you’ll know all too well of the minefield of information that is out there in books or online. Hydraulic Oil Grades Explained | How to Select the Right Hydraulic Oil | Everything you need to know about Hyd Fluid The ISO grade (32, 46, 68) fluid to be used should fall within the range of the optimum cSt listed in the right-hand column of the spec sheet.'ĪW Hydraulic Fluid - Cross reference ISO Viscosity to Approximate SAE The following chart may be used to help determine the proper ISO grade hydraulic fluid to use with your system by referencing the manufacturer and model pump used in your equipment or fluid powered system. The following chart may be used to cross over some of the more common brands of hydraulic fluid.Ĭross reference ISO VG 32 Grade Hydraulic FluidĬross reference ISO VG 46 Grade Hydraulic FluidĬross reference ISO VG 68 Grade Hydraulic FluidĬross reference ISO VG 100 Grade Hydraulic FluidĬross reference NON Foaming Hydraulic Fluid ISO VG Grade 32Ĭross reference NON Foaming Hydraulic Fluid ISO VG Grade 46Ĭross reference NON Foaming Hydraulic Fluid ISO VG Grade 68Ĭross reference HVI Low Temperature Hydraulic fluid ISO VG Grade 32Ĭross reference HVI Low Temperature Hydraulic fluid ISO VG Grade 46Ĭross reference HVI Low Temperature Hydraulic fluid ISO VG Grade 68Ĭross reference Universal Tractor Hydraulic Fluid If you need any help determining which oil may work best for your machine, please call us at 1-85. ![]() viscosity) these oils demonstrate.Ĭlick here to view or print the Comparative Viscosity Chart. These numbers refer to the standard testing mechanisms used to determine how much resistance to flow (i.e. AGMA 3 lubricants have a minimum viscosity of 90 mPa.s and a maximum viscosity of 110 mPa.s. ![]() SAE 30W oil has a minimum high-temperature kinematic viscosity of 9.3 mm 2/s (cSt). In the case of ISO VG 100 oil, those numbers are 90.0 cSt and 110.0 cSt, respectively. The midpoint is derived by taking the average of both the minimum and maximum kinematic viscosities. ISO VG 100 oil has a midpoint kinematic viscosity of 100 mm 2/s, also referred to as centistokes (cSt). ISO VG 100/SAE 30/AGMA 3 lubricants for industrial and (few) automotive applications are commonly employed in hydraulic systems, moderately-loaded and heavily-loaded gearboxes, food industry machinery, slide ways, and some air and gas compressors. In other words, these oil classifications are interchangeable in their applications - however, it is best to consult OEM specifications to determine which lubricant specification is recommended for use. Some oils that may be classified as ISO VG 100 oil may also be classified as an AGMA 3 and/or SAE 30 oil. Naturally, this specification is most often reserved for automotive lubricants, however, there are also SAE Gear Oils. SAE stands for the Society of Automotive Engineers. AGMA stands for the American Gear Manufacturers Association - this specification is dedicated to gear oils. This classification is almost exclusively limited to industrial lubricants. ISO VG stands for International Standards Organization Viscosity Grade.
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