In the last issue, we described how tribological properties of a lubricant can be measured using the srv. Shows the load at which steel balls become welded together. Fourball wear tester fourball ep tester load 180 kg. To fix this item automatically, select tagged pdf on the accessibility checker panel, and then choose fix from the options menu. T02u universal fourball testing machine is intended for determination of extreme pressure ep, antiwear aw and antifriction properties of lubricants and engineering materials, as well as determination of the tendency of lubricants and engineering materials to produce surface fatigue failures pitting. Normally, the wear scars on the three lower balls are measured and averaged. Matt bentley, beau fant, cody giles, shiva hemmatian, kian jost.
The effect of ball hardness on fourball wear test results. For example steel, we will go for the 10mm diameter ball with the applied load of the 3000 kg. For four ball tester measurement 10 ml of sample is required, which is mention in ip239. During a four ball wear test a rotating steel ball is pressed against three balls firmly held together and immersed in lubricant under test. Standard test method for wear preventive characteristics. Child must throw ball overhand 3 feet to within arms reach of tester. Falex fourball extreme pressure test machine bluesphere. The four ball tester is an excellent development and quality check instrument for developers and users of lubricating oils and greases. Note 2optional equipment with fourball apparatus consists of a.
Pdf test file congratulations, your computer is equipped with a pdf portable document format reader. The 4 ball ep test machine operates in a sliding or rolling motion. Six color coded files indicate hardness from 40 to 65 hrc. The limitation here is that pdf files do not readily expose the information that they contain. The method is used for the determination of the shear stability in the shell fourball tester of lubricating oils containing polymers. Specimens may either be of a standard format, or cut from real components. You can also choose from electronic ball tester, as well as from sgs ball tester there are 481 suppliers who sells ball tester on.
The four ball tester can be used to determine wear preventive properties wp, extreme pressure properties ep and friction behavior of lubricants both oils and greases. Small ball tester, to determine whether loose balls in toys intended for children under 36 months will pass entirely through the test fixture so that to address if the balls capable of entering and blocking the airway at the back of the mouth and upper throat. The falex fourball wear test machine is used to determine the relative wearpreventing properties of lubricating fluids and greases in sliding and rolling applications. Testing of lubricants testing in the fourball tester part 4. The test results allow prediction of inservice permanent viscosity loss. Enable tagging in the application in which the pdf was authored, and recreate the pdf. The fourball ep tester is designed for testing under more severe conditions and lacks the sensitivity necessary for the fourball wear test. A tribometer is an instrument that measures tribological quantities, such as coefficient of friction, friction force, and wear volume, between two surfaces in contact. The falex four ball wear test machine is used to determine the relative wearpreventing properties of lubricating fluids and greases in sliding and rolling applications. An analysis of protec s effect as a metal treatment thermo. The binding energy data obtained from xray photoelectron spectroscopy xps corroborated the formation of email protected triboactivity of the carbon nanospheres and the composites were assessed in base lube peg200 at 0. Easily sets five sizes of aluminum and steel rivets. A machine designed to measure the efficiency of lubricants by driving one ball against three stationary balls clamped together in a cup filled with the.
Data is stored to hard disc in standard spread sheet compatible file. The fourball ep tester is also used with optional fixturing to perform krl shear stability tests according to cec l45a99. Evaluation of lubricating grease using the same machine is detailed in test method d2266. It was invented by the 18th century dutch scientist musschenbroek. The size of the ball will be dependent on the material. Did you find the cad illustration or specifer information that you need. The 4ball rolling contact fatigue tests require the machine to be shut down by detecting the onset of pitting. Optional accessory kits for four ball wear testing astm d2266 and.
Astm d2596 15 standard test method for measurement of. Yukon department of education box 2703 whitehorse,yukon canada y1a 2c6. Test is used to measure the anti wear aw and extreme pressure ep properties of grease. The following documents are referred to in the text in such a way that some or all of their. The load recorded immediately before the occurrence of seizure seizure threshold load is defined as load carrying capacity.
Pdf the effect of ball hardness on fourball wear test. The standard falex four ball wear test machine is supplied with a 12 hp motor to drive the rotating ball at 1200 rpm. The measurement of extremepressure properties of a lubricating grease using the 4 ball method is designated under the astmd 2596. D259615 standard test method for measurement of extremepressure properties of lubricating grease fourball method weld point loadwear index fourball extreme pressure testers extreme pressure properties. A digital temperature system controls the initial temperature set point ambient to 200 c and displays the lubricant. Integrated surface engineering for improving energy efficiency. The fourball ep test measures a lubricants extreme pressure properties under. The 4 ball ep tester focuses on extreme pressure ep properties and the 4 ball wear focuses on wear scar ws, and coefficient of friction cof. In the second year, half of normal children are noncompliant. Tribological testing by 4 ball methods nye lubricants. A tribotester is the general name given to a machine or device used to perform tests and simulations of wear, friction and lubrication which are the. Child must perform standing broad jump over width of test sheet 8 12 inches.
Lubricants are compared using the average size of the scar diameters worn on the three lower clamped balls. The test load, duration, temperature and rotational speed are set on the four ball tester in accordance with standard test methods. Metal construction and simple design with few moving parts to ensure years of service. Extending rational functional tester to test pdf files.
Note 1it is important to distinguish between the fourball ep tester and the fourball wear tester. Product data sheet safety data sheet dynalub 510 product description dynalub 510 is a nlgi category 2 lithiumbased highperformance grease specially developed for linear motion. A wide variety of ball tester options are available to you, such as auto testing machine, universal testing machine. Din 5501 testing of lubricants testing in the fourball tester part 1. Pdf in this study, several procedures using the fourball wear tester have been evaluated using the astm engine reference oils. The fourball ep tester is designed for testing under more. If the document is revised or amended, you will be notified by email. The purpose of this testing is to determine the load carrying capabilities of a lubricating grease under high load applications. Din 5505 testing of lubricants testing in the fourball tester part 5.
In the rockwell test, we use the depth of the penetration to determine the hardness of the material rather than the surface area to determine the hardness. The falex four ball extreme pressure test machine measures a lubricants extreme. The unique sample configuration of three stationary balls and one top ball makes a very stable and a repeatable contact inturn, allowing test results to be very repeatable. The four ball tester is used to test the wear preventive wp and extreme pressure ep characteristics of greases and lubricating oils in sliding steelonsteel applications. As of today we have 76,382,623 ebooks for you to download for free. The temperature of the test lubricant is regulated at 75c 167f and then the top ball is rotated at 1200 rpm for 60 min.
This issue covers other methods for determining tribological characteristic of a lubricating grease, using two astm test methods, the 4ball ep tester and 4 ball wear. A wide variety of four ball wear testing machine options are available to you, such as abrasion tester. Fowlers hardness tester file set is an inexpensive, easytouse method for determining material hardness by sliding the file across the objects surface. The contact surfaces are covered with test lubricant, a load is applied and a timed test is performed. Fourball tester article about fourball tester by the. How much lubricant is required to carryout a single test on a four ball tester. Minimal range selectable down to 5% of fsd quick release pull hook system for very fast load tool changes no tools needed. The point contact interface is obtained by rotating a 12.
Fourball wear tester 020001003 the falex fourball wear tester determines the relative wearpreventive properties of lubricating fluids and greases in sliding and rolling applications. You should be able to view any of the pdf documents and forms available on our site. Pdf fourball wear test for engine oil evaluation researchgate. Four ball tester ducom instruments the tribology company. A mechanical lever arm applies loads up to 50 kilograms on the ball specimen. Visit our lab falex tribology testing and technical support. Determines loadwear index lwi, last nonseizure load lnsl and weld point wp. Auto hook function for automatic repeatable hook to wire positioning. Lightweight plastic bottle catches rivet stemsnosepieces thread into.