Block on Ring Tribometer

Rigid, Inline Torque to Test Grease, Lubricants, Bearings, Shaft, Seals etc.

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Block on Ring Tribology Tester Overview

Block on ring tester helps to determine coefficient of friction, wear, friction, rate of wear, volume wear and EP, wear resistance of lubricant, greases, bearings, rings, shaft etc . The test can run under wide range of load, sliding speed, rotational speed and temperature.

Module Features
● Rigid design to support high load tests
● Dry and Lubricated tests
● Continuous or cyclic tests
● Test bearings, shaft, seals, oil, grease, rings
● Inline Torque measurement

MFT-5000 Platform

Rtec Universal Tribometer MFT-5000

The state of the art Rtec Multi Function tribometer Mft-5000 is globally regarded as the most versatile and technologically advanced tribometer.  The patented integrated 3D profilometer allows to analyse surface change vs time makes it usable for many application across various industries. In addition it comes with patented force sensors (piezo, capacitive & strain gauge) with ultra low resolution, highest speeds, stable torque and widest load range than any other commercially available tribometer. 

MFT-5000 verstatily allows to mount several test/application specific modules on same platform. Please visit following links to learn more -  Lubricant Summary page, Product page, Main Applications

Module Summary Tests

Rtec Block on Ring tribometer module to do several friction and wear tests for oil, grease, lubricants
Wear Test - This method covers the determination of the friction and wear characteristics of greases or oil in sliding applications on block on ring test machine. Depending on the application and test requirements, the samples can be submerged, or the lubricant can be circulated using pumps or grease dispensers at controlled flow rates. The tests can be easily configured by defining the temperature (up to 500C), loading rate, test load (up to 10,000N) and rotation speed (up to 5000 rpm). The rotating shaft is supported from both ends to prevent bending under high loads.  

EP Test -This method covers the determination of the extreme pressure properties of lubricating oil or greases in sliding applications. The test condition typically involves increasing load increased in step or linear mode until there is seizure or sudden increase of coefficient of friction during the test occurs. This method is commonly used in Timken ok test for grease and lubricants (ASTM D2509 and ASTM D2782). The wear on the sample is evaluated to determine pass/fail criteria for the lubricant at the load being tested. 

Custom Tests-  Block on ring wear testing machine setup is a highly used test across oil industry. Rtec versatile block on ring wear testing machine allows to perform many customized tests such as oscillating tests, where the rings are oscillated clockwise and counter clockwise to a pre-determined angle or number of rotations. These tests are frequently performed to evaluate the performance of solid lubricants, coatings or surface texture on bearings and in applications where there is frequent change in direction or limited motion between the two counter parts. Customizable nature of block on ring modules allows real components including shafts, power transmission components, tapered roller bearings, thrust bearings and their counter parts to be mounted without much modifications.

ANALYSIS

Figure shows the comparison of different lubricants as tested using the block on ring module on a standard test block HRC30 against a Timken ring, under constant load (1500N) and velocity (1500 rpm) at 200C.
Rtec Block on Ring Test Data

Conclusion

MFT-5000 block on ring module is an excellent option to run tests in block on ring mode. The load can be applied up to 10,000N with a precise temperature control and monitoring. Several ASTM and customized tests can be carried out on the same platform by adjusting the volume and flow rate of lubricant, loading rate, applied load, speed of rotation and test temperature. Several customized tests can also be performed on this module including testing real components. This module is useful to characterize tribological properties of additives, grease, oils, coatings, solid lubricants, bearings, shafts etc.

Keywords

ASTM D2981, D3704, G77, G176, D2509, 2782, Timken load tester, timken test machine

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