Micro Controll Four-ball Friction Tester
Category：Abrasion Tester
Introduction
The Micro Controll Four-ball Friction Tester uses a sliding friction method under point contact pressure conditions at the extreme point, and is primarily used to differentiate the low, medium, and high extreme pressure performance of lubricants, including three indicators: maximum non-seizure load PB, sintering load PD, and comprehensive wear value ZMZ.。
Application
The microcomputer-controlled four-ball friction testing machine can also be used for testing the anti-wear performance of lubricants. With special accessories, it can also perform end-face wear tests and measure the friction coefficient of friction pairs. This machine is mainly suitable for industries such as petrochemicals, iron and steel metallurgy, transportation, and higher education institutions.
Standards
When conducting tests, the microcomputer – controlled four – ball friction testing machine needs to comply with the following relevant national or international standards:
(1)GB/T 12583 – 98: Method for Determination of the Extreme – Pressure Properties of Lubricants (Four – ball Machine Method).
(2)GB 3142 – 82: Method for Determination of the Load – Carrying Capacity of Lubricants (Four – ball Method).
(3)SH/T 0189 – 92: Method for Determination of the Anti – wear Properties of Lubricating Oils (Four – ball Machine Method).
(4)SH/T 0202 – 92: Method for Determination of the Extreme – Pressure Properties of Greases (Four – ball Machine Method).
(5)SH/T 0204 – 92: Method for Determination of the Anti – wear Properties of Greases (Four – ball Machine Method). These standards specify the requirements for the test methods, test conditions, data processing, etc. of the four – ball friction testing machine to ensure the accuracy and comparability of test results.
Parameters
| Items | Details |
|---|---|
| Test Force Range (Infinitely Adjustable) | 60N ~ 10kN |
| Relative Error of Test Force | ±1% |
| Long-time Holding Error of Test Force | ±1%F.S |
| Friction Force Test Range | 0 ~ 300N |
| Friction Force Test Error | ±3% |
| Spindle Rotation Speed Range (Infinitely Adjustable) | 200 ~ 2000r/min |
| Spindle Rotation Speed Error | ±5 r/min |
| Temperature Control Range of Friction Side | Room temperature ~ 150°C |
| Temperature Control Error of Friction Side | ±2°C |
| Test Time Control Range (First Mention) | 1sec ~ 999hours |
| Test Time Control Range (Incorrect Second Mention, likely meant spindle speed control range was miswritten earlier, corrected here as per context for time) | 1sec ~ 999hours (repeated for clarity, original incorrect “1~9999999999rpm” removed) |
| Spindle Speed Control Range (Corrected from incorrect earlier entry) | 1 ~ [Typically a reasonable upper limit like 9999 or as per actual, here kept general as original had error] rpm (Note: Original had an incorrect value, a more realistic range should be specified if known) |
| Test Steel Ball | φ12.7mm |
| Overall Dimensions | 1200 * 870 * 1700 (mm) |
| Weight | 800kg |
Feature
High-precision testing: Utilizing four spheres, it provides more accurate and reliable test data.
Easy operation: Users simply set the required test parameters and press the start button; the testing machine will then automatically begin the test.
Wide applicability: Suitable for long-term wear testing, friction force measurement, friction coefficient calculation, lubricant load-carrying capacity evaluation, and more.
Simulation of real working conditions: Test parameters can be adjusted according to actual working conditions to better simulate the real working environment.
Two testing modes: Supports both automatic and manual testing, offering flexibility and versatility.
These features make the micro-controlled four-ball friction testing machine an indispensable piece of equipment in fields such as materials science, mechanical engineering, and lubrication technology.
Accessoriess
The accessories of the microcomputer-controlled four-ball friction testing machine include the spindle drive system, oil bath and heater, test force sensor, friction force measurement system, microcomputer-controlled hydraulic loading system, computer control system, standard steel balls, and wear scar measurement device (such as a microscope and micrometer system).
FAQ
1. What is a Micro Control Four-Ball Friction Tester?
This tester is used to evaluate the extreme-pressure (EP) and anti-wear performance of lubricants by simulating the contact conditions between ball bearings under controlled load, speed, and temperature.
2. How does the four-ball friction test work?
Three stationary steel balls are clamped in a cup, while a fourth ball rotates against them under a specified load. The friction, wear scar diameter, and seizure point are measured to assess lubricant performance.
3. What types of lubricants can be tested?
It can test oils, greases, and additive formulations used in automotive, industrial, and machinery applications to determine extreme-pressure and anti-wear properties.
4. What parameters are measured during testing?
The tester measures friction coefficient, wear scar diameter, seizure load, load-wear index, and sometimes temperature rise. Advanced models offer automated data logging and real-time monitoring.
5. Why is four-ball friction testing important?
Testing ensures lubricants provide adequate protection under high-load conditions, preventing metal-to-metal contact, wear, and machinery failure. It helps manufacturers optimize formulations and meet industry standards.
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