Standard Practice for Defining the Viscosity Characteristics of Hydraulic Fluids

Importancia y uso:

5.1 The purpose of this practice is to establish viscosity designations derived from viscosities measured by test methods which have a meaningful relationship to hydraulic fluid performance. This permits lubricant suppliers, lubricant users, and equipment designers to have a uniform and common basis for designating, specifying, or selecting the viscosity characteristics of hydraulic fluids.

5.2 This practice is not intended to be a replacement for Classification D2422. Rather, it is an enhancement intended to provide a better description of the viscosity characteristics of lubricants used as hydraulic fluids.

5.3 This practice implies no evaluation of hydraulic oil quality other than its viscosity and shear stability under the conditions specified.

5.4 While it is not intended for other functional fluids, this practice may be useful in high-shear-stress applications where viscosity index (VI) improvers are used to extend the useful operating temperature range of the fluid.

5.5 This practice does not apply to other lubricants for which viscosity classification systems already exist, for example, SAE J300 for automotive engine oils and SAE J306 for axle and manual transmission lubricants.

Subcomité:

D02.N0

Referida por:

D8324-21, D6351-22, D6158-23

Volúmen:

05.02

Número ICS:

75.120 (Hydraulic fluids)

Palabras clave:

hydraulic fluid; rotational viscosity; shear stability; viscosity; viscosity classification;