High Temperature Oxygen Resistant Gear Oil
Formulated using either petroleum or synthetic lubricant base oils, gear oil includes extreme pressure anti-wear additives and oily agents. It plays a crucial role in gear transmission devices by preventing tooth wear, abrasion, sintering, and other forms of damage. This not only extends the gears' service life but also enhances power transmission efficiency and minimizes power loss.
Product Details：High Temperature Oxygen Resistant Gear Oil
Gear oils should have good anti-wear, load resistance and suitable viscosity. In addition, it should also have good thermal and oxidative stability, anti-foaming, water separation properties and anti-rust properties. As the gear load is generally in 490 MPa (MPa) or more, and hyperbolic tooth load is higher than 2942 MPa, in order to prevent the oil film rupture caused by tooth wear and abrasion, in the gear oil is often added to the extreme pressure anti-wear agents, commonly used sulfur - phosphorus or sulfur - phosphorus - nitrogen type additives. The amount of gear oil accounts for about 6% to 8% of the total lubricating oil.
PARAMETER：
Sports Event | Quality Indicators | Test Methods | ||||||
Viscosity grade | 100 | 150 | 220 | 320 | 460 | 680 | ||
Kinematic viscosity (40°C) mm²/s) | 90-110 | 135-165 | 198-242 | 288-352 | 414-506 | 612-748 | GB/T265 | |
Viscosity index | not less than | 90 | 90 | 90 | 90 | 85 | 85 | GB/T1995 |
Open flash point,℃ | not less than | 200 | 200 | 200 | 200 | 200 | 200 | GB/T3536 |
Pour point,°C | not exceeding | -12 | -9 | -9 | -9 | -9 | -5 | GB/T3535 |
Steel sheet corrosion(100°C,)(3 hours)/grade | not greater than | 1 | GB/T5096 | |||||
Corrosion test(distilled water) | rust-free | GB/T11143 | ||||||
Foaminess (Foam propensity/foam stability) mL/mL 24°C 93.5°C Post 24°C | not greater than not greater than not greater than | 50/0 50/0 50/0 | GB/T12579 | |||||
Tim ken test(OK load) /N(Lb) | not less than | 267(60) | GB/T11144 | |||||
Anti-emulsification (82℃)Water in oil /%(mass fraction), emulsion layer /ml,total separated water/ml | not greater than | 2.0 1.0 80.0 | GB/T8022 | |||||
Four-ball test Load wear index/ N Sintering load(P value)/N | not less than not less than | 441(45) 2450(250) | GB/T3142 | |||||
CL-100 Gear Test (A/8.3/90) | not less than | 12 | >12 | >12 | >12 | >12 | >12 | SH/T0305 |
1. Characteristic
Appropriate viscosity and good viscosity temperature are the most basic properties of gear oil. The viscosity is high, resulting in a thick lubricating oil film and relatively high load resistance.
Sufficient extreme pressure and wear resistance. Extreme pressure and wear resistance are the most important properties and main characteristics of gear oil. Due to the fact that gear loads are generally above 490 MPa, while hyperbolic tooth surface loads can reach up to 2942 MPa, extreme pressure anti-wear agents are generally added to gear oil to prevent tooth surface wear and abrasion caused by oil film rupture. Previously, sulfur chlorine, sulfur phosphorus chlorine, sulfur chlorine phosphorus zinc, sulfur lead, and sulfur phosphorus lead additives were commonly used. Currently, sulfur phosphorus or sulfur phosphorus nitrogen additives are commonly used.
2. Main Indicators
Viscosity is an important factor in the selection of gear oils, in 1983, the Society of Automotive Engineers (SAE) of automotive gear oils at 98.9 ° C (210 ° F) kinematic viscosity is divided into seven levels, of which 70W, 75W, 80W and 85W for the winter and the cold zone with gear oils, the minimum temperature of use for the -55, -40, -26 and -12 ° C accordingly; the remaining three viscosity levels for 90, 140 The other three viscosity levels are 90, 140 and 250, the higher the level, the greater the viscosity. In recent years, from the perspective of energy saving, it is common to use low viscosity thickened oils (multigrade gear oils) for all seasons. The viscosity classification of industrial gear oils is the same as that of lubricating oils, and the center value of kinematic viscosity at 40℃ is used.
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