ASTM-D4683 2013

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D4683-13 Standard Test Method for Measuring Viscosity of New and Used Engine Oils at High Shear Rate and High Temperature by Tapered Bearing Simulator Viscometer at 150?°C

Published By	Publication Date	Number of Pages
ASTM	2013	12

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Category: ASTM

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Description

ASTM D4683-13

Historical Standard: Standard Test Method for Measuring Viscosity of New and Used Engine Oils at High Shear Rate and High Temperature by Tapered Bearing Simulator Viscometer at 150 °C

ASTM D4683

Scope

1.1 This test method covers the laboratory determination of the viscosity of engine oils at 150 °C and 1.0·10⁶ s⁻¹ using a viscometer having a slightly tapered rotor and stator called the Tapered Bearing Simulator (TBS) Viscometer.²

1.2 The Newtonian calibration oils used to establish this test method range from approximately 1.2 mPa·s to 7.7 mPa·s at 150 °C. The precision has only been determined for the viscosity range 1.47 mPa·s to 5.09 mPa·s at 150 °C for the materials listed in the precision section.

1.3 The non-Newtonian reference oil used to establish the shear rate of 1.0·10⁶ s⁻¹ for this test method has a viscosity closely held to 3.55 mPa·s at 150 °C by using the absolute viscometry of the TBS.

1.4 Manual, semi-automated, and fully automated TBS viscometers were used in developing the precision statement for this test method.

1.5 Application to petroleum products such as base oils and formulated engine oils was determined in preparing the viscometric information for this test method.

1.6 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.6.1 This test method uses the milliPascal·second (mPa·s) as the unit of viscosity. This unit is equivalent to the centipoise (cP).

1.7 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Keywords

absolute viscometer; absolute viscometry; dynamic viscosity; engine oils; high shear rate viscosity; high shear viscosity; high temperature viscosity; high shear rate viscosity at 150 °C; rotational viscometer; rotational viscometry; Tapered Bearing Simulator Viscometer; TBS

ICS Code

ICS Number Code 75.100 (Lubricants, industrial oils and related products)

DOI: 10.1520/D4683-13

Additional information

Standard Title	D4683-13 Standard Test Method for Measuring Viscosity of New and Used Engine Oils at High Shear Rate and High Temperature by Tapered Bearing Simulator Viscometer at 150?°C
Published Code	ASTM
Publication Date	2013
Pages Count	12