Learning more about your specific application can help deliver extra value and performance, while avoiding unnecessary expenses. 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 those cases, the viscosity will be listed as its viscosity at 40 C, and called ISO grade. Occasionally, the actual lubricant viscosity will not fall within established grade parameters. Translating the viscosity is a good first step and can be sufficient for most general-purpose applications. Viscosity Grades may be listed as SAE, ISO or NLGI grade numbers. 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. The bigger the difference in viscosity from the original oil, the more turns/clicks would need the adjuster.Several organizations (ISO, SAE, AGMA) have created competing standards to define oil viscosity ranges, but most of them mean the same thing. This doesn’t means that suspension behaves exactly the same as with 14,14cst oil, but slow speed behaviour is similar. Turn the external adjusters 1 click/1/8turn anti-clockwise. To operate in outdoor temperatures down to 0F, either heaters would be necessary to bring the temperature above 21F for starting. This means that all damping (compression and rebound) will be slower, in general. For a large industrial electric motor, for instance, a heavy turbine oil (ISO viscosity grade VG 68) calls for a low-temperature limit of 21F for the 2,000 cSt machine's viscosity limit, as specified in Table 1. Couldn’t find nothing else than a 15.3cst oil. Beyond that, the damping behaviour is quite different.Ī change on oil’s viscosity could need a new damping adjuster (low speed adjusters COMP/TEN) set-up. If you can’t find the same viscosity as your original oil has, choose one with a difference of +/- 5cst. SAE range is only shown for your reference. Therefore, it is important to remember that the viscosity of a fluid (resistance offered by a liquid to flow) has nothing to do with its density (mass per unit volume).Ĭheck the next video to learn more about the importance of visosity (and suscribe to our channel!)īelow you can find a equivalence suspension oil chart (both for motorcycle and bicycle) where you can easily choose the closest oil to the original one. The greater the number, the more stable the viscosity is against temperature changes. Viscosity index indicates the “quality” of the oil. The viscosity is measured in centistokes (cSt) or mm2/s at 40✬ as a reference temperature and is a technical characteristic of each oil. You can also look up for it on internet forums, although it may take longer. You can look up for the original oil specs in the workshop manual or by asking to an official dealer. In case you can’t find the original oil, use the one with the closest kinematic viscosity. We recommend using the original oil on your suspensions so that the damping behavior is not changed. Want to learn more? Get our Motorcycle Geometry and Suspension Adjustment e-book! General recommendations
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |