What is four ball tribometer?

Four Ball Tester, also known as Shell four ball tester, is used to characterize lubricants properties, such as wear prevention (WP), extreme pressure (EP) and frictional behavior (various testing standards are listed below).

What is ASTM d 2266?

ASTM D2266 Wear Preventative Characteristics of Lubricating Grease (Four Ball Method) Lubricants intended for use with moving steel parts normally contain compounds to inhibit damage to rubbing metal, giving the lubricant its wear preventative characteristics. Use ASTM D2266 for grease and ASTM D4172 for oils.

What is an SRV test?

Tribological Testing by SRV® The SRV measures the physical interactions between a lubricant and two specimens in a loaded contact in either rotational or linear oscillatory motion. The test load is increased every 2 minutes until the specimens weld together, indicating lubricant failure.

What is weld load?

The welding load [N] is the applied load at which the individual balls are welded together. The wear characteristic [mm] is the average diameter of the spherical caps which is formed at a constant load following a defined testing time.

What is a 4 Ball wear Test?

4 Ball Wear The purpose of this test is to determine the wear preventive characteristics of a lubricant. In the 4-Ball Wear test, a steel ball is rotated against three lubricated stationary steel balls under a specified load, speed, temperature and time, per ASTM D-2266 (grease) or ASTM D-4172 (oils).

What is the model number four ball tester?

ASTM, DIN, ISO Compliant The 4-ball tester is used to study extreme pressure EP, coefficient of friction, load wear index, ball weld point, and wear preventive additives for lubricating grease, oil, and additives.

What is a 4 Ball Wear Test?

What is four ball weld load?

Load carrying capacity by Soda four-ball test(JIS K 2220) These are numerical values that provide a rough guide to anti-seizure properties of lubricants. In either case, the higher the value, the greater the anti-seizure property.

What is SRV in networking?

From Wikipedia, the free encyclopedia. A Service record (SRV record) is a specification of data in the Domain Name System defining the location, i.e., the hostname and port number, of servers for specified services. It is defined in RFC 2782, and its type code is 33.

What is wear scar diameter?

While most of the wear is on the disk because it is softer, the wear scar on the ball is used to quantify the test result. The wear scar on the ball is measured under 100 × magnification (Figure 5) to the nearest 0.01 mm. The reported wear scar diameter (WSD) is the average of the major and minor axis of the wear scar.

How does a Tribometer work?

During a typical test, a ball is slid on an angle along a track until it impacts a surface and then bounces off of the surface. The friction produced in the contact between the ball and the surface results in a horizontal force on the surface and a rotational force on the ball.

What is DNS SRV query?

The SRV record is a Domain Name System (DNS) resource record. It’s used to identify computers hosting specific services. SRV resource records are used to locate domain controllers for Active Directory.

What do you need to know about ASTM E84?

What is ASTM E84? ASTM E84 is an American standard test method for surface burning characteristics of Building Materials (equivalent to the Canadian standard CAN/ULC-S102). A 10-minute test in a Steiner Tunnel allows to determine the Flame Spread and Smoke Density index.

Which is the four ball wear test machine?

ASTM D4172 Standard Test Method of Wear Preventive Characteristics of Lubricating Fluids (Four-Ball Method) ASTM D5183 Standard Test Method for Determination of the Coefficient of Friction of Lubricants Using the Four-Ball Wear Test Machine IP 300 Rolling Contact Fatigue Tests for Fluids in a Modified Four-Ball Machine

Which is Falex four ball wear tester do you use?

The Falex Four-Ball Wear Tester determines the relative wear-preventive properties of lubricating fluids and greases in sliding and rolling applications. It is the only test machine proven through cooperative inter-laboratory testing to meet requirements of ASTM D2266 and D4172.

What is the purpose of the 4 ball test?

The purpose of this test is to determine the wear preventive characteristics of a lubricant. In the 4-Ball Wear test, a steel ball is rotated against three lubricated stationary steel balls under a specified load, speed, temperature and time, per ASTM D-2266 (grease) or ASTM D-4172 (oils).