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APPARATUS FOR SHEAR STABILITY OF LUBRICATING OILS CONTAINING POLYMERS AZA1329
The Apparatus for Shear Stability of Lubricating Oils Containing Polymers (Model: AZA1329) from AZA Lab is a high-precision KRL-type friction tester designed to determine the shear stability of lubricating oils and polymer-containing pressure fluids. It operates in accordance with DIN 51350-6 – Testing of Lubricants: Testing in the Shell Four-Ball Tester, Part 6, which defines the KRL method (Kugel Rollen Lager) for viscosity stability testing.
The instrument uses SKF 32008 tapered roller bearings as the friction pair to simulate the mechanical shear conditions experienced by lubricants in transmission and hydraulic systems. This test provides a reliable prediction of permanent viscosity loss, helping users evaluate the durability and performance stability of lubricants under stress.
Description
Working Principle
The AZA1329 KRL Tester applies controlled mechanical shear stress to the test lubricant inside a four-ball friction system equipped with a tapered roller bearing assembly.
Under specified conditions—speed of 1500 rpm, test force of 5000 N, temperature of 60°C, and test duration of approximately 20 hours—the lubricant experiences mechanical degradation similar to that occurring in real gear systems.
After the test, the viscosity is measured before and after shearing. The percentage decrease in viscosity represents the shear stability of the lubricant.
Construction and Design
The AZA1329 is built on a heavy-duty steel frame and includes a precision-controlled heating and cooling system. The testing chamber is embedded with the bearing and mandrel assembly, supported by advanced sensors and controllers to ensure consistent performance throughout the test duration.
The system consists of:
- Embedded test body and drive spindle
- SKF 32008 tapered roller friction pair
- Tapered roller bearing assembly
- Constant temperature control system
- Data acquisition and display interface
Key Features & Advantages
- Standards Compliant: Fully meets DIN 51350-6 and equivalent CEC L-45-99 (KRL) requirements.
• Real-World Simulation: Recreates mechanical shear conditions of lubricants under load.
• Stable Temperature Control: Imported compressor maintains a constant 60°C ±1°C environment.
• High Load Capability: Supports continuous operation at 5000 N load.
• Long-Duration Test Operation: Performs up to 1.74 million revolutions (≈20 hours).
• Precision Monitoring: Displays real-time temperature, speed, and duration.
• Durable and Safe: Rugged design with overload and overheat protection.
• Low Maintenance: Built for continuous operation with minimal servicing.
Test Conditions
| Parameter | Condition |
| Tap Speed | 1500 RPM |
| Test Force | 5000 N |
| Test Temperature | 60°C |
| Test Duration | 20 Hours |
| Total Revolutions | 1.74 Million |
The AZA1329 Apparatus for Shear Stability of Lubricating Oils Containing Polymers from AZA LAB offers a dependable, high-precision solution for evaluating lubricant shear stability according to DIN 51350-6 standards. With its rugged design, automated temperature control, and reliable performance, this system is an essential tool for laboratories focused on lubricant development, testing, and certification.
| Parameter | Specification |
|---|---|
| Model | AZA-1329 |
| Applicable Standard | DIN 51350-6 |
| Motor Speed | 1475 ± 25 RPM |
| Temperature Control Mode | Imported compressor cooling system |
| Sample Temperature | 60 ± 1°C |
| Sample Volume | 40 ± 0.5 ml |
| Test Load | 5000 ± 200 N |
| Total Revolutions | 1.74 million |
| Test Duration | Approximately 19 hours 40 minutes |
| Power Requirement | 5.5 kW |
| Power Supply | AC 220V, 50Hz |
| Dimensions (L × W × H) | 640 × 380 × 895 mm |
| Weight | 150 kg |
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