An increase in the temperature usually reduces the viscosity conversely, a temperature reduction usually increases the viscosity. It is the evidence of cohesion between the particles of a fluid which causes a liquid to offer resistance analogous to friction. Learning more about your specific application can help deliver extra value and performance, while avoiding unnecessary expenses. Viscosity - Property of a liquid that resists any force tending to produce flow. We'd recommend looking also at oils by category (such as Spindle, Way, Gear, and Hydraulic oils) and consider between synthetic and conventional oils. 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)
Viscosity conversion iso#
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.
![viscosity conversion viscosity conversion](https://www.mdpi.com/materials/materials-14-06939/article_deploy/html/images/materials-14-06939-g004.png)
Oils grades that are on the same horizontal line (with the correct Viscosity Index) on the chart are equivalent. To achieve a viscosity of 800 cSt as shown in the example, 68% of 1000 cSt and 32% of 500 cSt fluids are blended.Several organizations (ISO, SAE, AGMA) have created competing standards to define oil viscosity ranges, but most of them mean the same thing. When fluids covering a wider range are blended, the chart will only approximate the finished viscosity. This method is reasonably accurate in predicting blend viscosity when the two fluids differ in viscosity by no more than one magnitude (one power of ten).
![viscosity conversion viscosity conversion](http://www.zpag.net/Units/Images1/oil_vi96.jpg)
![viscosity conversion viscosity conversion](https://img.pdfslide.net/img/1200x630/reader020/image/20190921/588dabae1a28ab84208bb7d0.png)
For high accuracy, measure the actual viscosity of the blending fluids.