What is the difference between ISO 46 and ISO 68 hydraulic oil?
The numbers 46 and 68 refer to the ISO Viscosity, and all hydraulic oils sold in Australia use this number grading system. These numbers can be thought of in this way: the lower the number, the thinner the oil and the higher the number the thicker the oil. Oil viscosity changes with temperature.
What’s the difference between 46 and 68 hydraulic oil?
ISO 46 Hydraulic Oil – ISO VG 46 Hydraulic Fluid is normally required for industrial plant working under high-pressure etc. ISO 68 Hydraulic Oil – ISO VG 68 Hydraulic Fluid is designed for use in systems which require a large load-carrying ability.
What is ISO 68 hydraulic oil used for?
Hydraulic oil 68 grade is most commonly used for hydraulics with vane-, piston-, or gear-type pumps, especially where pressures exceed 1000 psi. They can also be used to lubricate lightly loaded reciprocating compressors.
Can I use ISO 68 instead of ISO 46?
If your tractor or truck calls for 20W hydraulic oil, it may be best to use the thicker ISO 68 in hot temperatures and thinner ISO 46 in cold weather.
What is VG 68 oil?
NYBASE ISO VG 68 is an upper mid-range viscosity speciality base oil for Group I replacement, with high Viscosity Index (VI), high Flash Point (FP) and excellent low temperature properties. Recommended for the formulation of industrial, automotive and metal working fluids.
Is ISO 68 the same as AW 68?
AW 68 hydraulic fluids have an International Standards Viscosity Grade or ISO VG of 68. This is the thickness of the fluid tested at 40 degrees Celsius. ISO VG 68 is on the heavier side for a hydraulic fluid which flows equivalent to a SAE 20 weight lubricant.
What does VG mean in hydraulic oil?
viscosity grade
Now to the numbers: 22, 46 and 315 refer to the viscosity grade (VG) of the oil; 22 and 46 are ISO grades and refer to the oil’s kinematic viscosity in centistokes at 40 degrees Celsius, plus or minus 10 percent. So, an ISO VG 46 hydraulic oil has a viscosity of between 41.4 and 50.6 centistokes at 40 degrees Celsius.
Is ISO VG 46 the same as AW 46?
AW 46 Hydraulic Oils contain a zinc anti-wear additive that is designed to protect hydraulic systems and equipment by reducing wear. AW 46 hydraulic fluids have an International Standards Viscosity Grade or ISO VG of 46. This is the thickness of the fluid tested at 40 degrees Celsius.