1 9 Grading System . Under this system, 9 is the top grade. This change in grading system means that there will be fewer grade 9s awarded than a* grades. Gcse Grading System 19 Blog Career Charts Himes Romble from himesromble.blogspot.com A closer look into the marking and igcse grade boundaries of these papers the igcse cambridge board receives over 8 million answer scripts a year from students all over the world. On the other hand, in the old gcse system used in wales and northern ireland students’ achievement is evaluated using a. The diagram above shows how the new grades compare.
Gear Oil Grades Explained. Gear oil is typically 80w90 or something like 85w140 grade oil while hydraulic oil which is inside the grade of programmed transmission liquid is something like 10w20 grade oil. The various types of grades are as follows:
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It should be noticed that there is no relationship between the sae engine oil and gear oil classifications. Sae 50 = 16.3 to less than 21.9cst. Terms such as thick, heavy or high suggest a fluid with strong resistance to flow, such as honey.
The Majority Of These Grades Are Obsolete From An Automotive Standpoint.
Synthetic gear oils are multigrade and have every preventive additive included as part of its makeup. Designation of gear oils by performance american petroleum institute (api) established a performance grading system for gear oils (mostly automotive gear oils). Sae 20 = 5.6 to less than 9.3cst.
Sae 50 = 16.3 To Less Than 21.9Cst.
Engine oils naturally thicken as they cool and thin as they are heated. It should be noticed that there is no relationship between the sae engine oil and gear oil classifications. Gearboxes do not have an oil pump, so the high viscosity is needed to distribute the oil and to keep it on the metal surfaces, as.
The Various Types Of Grades Are As Follows:
Main differences between gear oil and hydraulic oil. To read the grade of engine oil, look at the sae (society of automotive engineers) classification. This classification defines 20 viscosity grades in the range of 2 to 3200 square millimeters per second (1 mm2/s = equals 1 cst) at 40ºc (104ºf).
Gear Oil Is A Lubricant Made Specifically For Transmissions, Transfer Cases, And Differentials In Automobiles, Trucks, And Other Machinery.it Is Of A High Viscosity And Usually Contains Organosulfur Compounds.
On the off chance that thickness or slenderness identifies with viscosity, gear oil is more viscous than hydraulic oil. • monolec® syn gear oil (9919, 9923) is a 100 percent synthetic, limited slip gear oil designed for use in. Gear oil is different from engine oil.
It Prevents Rust, Foaming Inside The Gearbox And Wear Of The Gears.
Sae 40 = 12.5 to less than 16.3cst. If this is the case, check with a lubricant manufacturer or old versions of the agma document to cross to a current viscosity grade and type. Mineral oil containing 3~10% of fatty oil or synthetic fatty acid (generally used for worm gears) 160 (71℃)~200℉이하.
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