Koehler K18348 Lubricating Grease Roll Stability Roller

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Product Overview

Koehler K18348 4 Roller High Temp Stability of Lubricating Grease

Manufactured by Koefler this model K18348 conforms to ASTM D1831 and is Microprocessor controlled. This four roller unit is an upgrade from the standard 2 roller unit. This high temp expands the temperature range to 320 F / 160 C.

Roll stability apparatus for shear stability tests on lubricating greases. Rotates steel test cylinders at 10 or 165rpm in a thermostatically controlled environment at temperatures.

Koehler Roll Stability Tester K18320 and K18348

  • ASTM D1831, MIL-G-10924SA
  • Maximum Temperature: 200°F (93°C)
  • Temperature Control Stability: ±2°F (±1°C)
  • Volts 220
  • Amps 13

Lubricating grease plays a crucial role in ensuring the smooth operation and longevity of mechanical systems in various university-level research applications. Evaluating the performance and quality of lubricating grease is essential to optimize equipment functionality, reduce friction and wear, and minimize downtime. In this technical note, the memo will emphasize the significance of testing lubricating grease using a stability roller and highlight the industry-standard testing methods, ASTM D1831 and MIL-G-10924SA, commonly utilized to assess the performance characteristics of grease.

Importance of Testing Lubricating Grease using a Stability Roller:

Testing lubricating grease using a stability roller is a critical step in evaluating its suitability for demanding university-level research applications. The stability roller test assesses the grease's ability to maintain its consistency, structure, and lubrication properties under challenging operating conditions. This test involves subjecting the grease to high loads and extreme temperatures, simulating real-world scenarios and ensuring its performance under stress.

For university-level research, the performance and reliability of lubricating grease directly impact the efficiency and accuracy of experimental setups. Proper lubrication using high-quality grease with excellent stability characteristics minimizes friction, reduces heat generation, and prevents premature component failure. Testing with a stability roller helps identify greases that can withstand varying operating conditions, providing researchers with confidence in their equipment's longevity and accuracy.

Standard Testing Methods: ASTM D1831 and MIL-G-10924SA

To assess the performance and stability of lubricating grease, industry-standard testing methods are employed. Two widely recognized methods used in university-level research and various industries are ASTM D1831 and MIL-G-10924SA.

ASTM D1831: This test method measures the cone penetration of lubricating grease using a cone penetrometer. The test determines the grease's consistency or hardness, which reflects its stability under specific conditions. Lower cone penetration values indicate greater stability and resistance to softening, making the grease suitable for high-load applications.

MIL-G-10924SA: This military specification outlines the requirements and testing procedures for greases used in military and aerospace applications. The MIL-G-10924SA test evaluates the stability, load-carrying capacity, and other performance characteristics of lubricating greases under extreme conditions. Greases that meet MIL-G-10924SA standards ensure reliable operation and longevity in critical applications.

By utilizing these standardized testing methods, university-level researchers can assess the performance and stability of lubricating greases accurately. These tests provide valuable information about the grease's behavior under different loads, temperatures, and operating conditions, enabling researchers to make informed decisions regarding the selection of the most suitable grease for their specific research requirements.


Testing lubricating grease using a stability roller is of paramount importance in university-level research applications. It ensures that the selected grease can withstand the demanding operating conditions and provides reliable lubrication to critical mechanical components. The industry-standard testing methods, ASTM D1831 and MIL-G-10924SA, offer researchers a reliable framework to evaluate grease stability, consistency, and overall performance characteristics.

By conducting rigorous grease testing, university-level researchers can optimize equipment performance, reduce friction and wear, and enhance the accuracy of their experimental setups. Employing the recommended testing methods ensures consistency, reliability, and adherence to high-quality standards in lubricating grease evaluation and selection.

For university-level research projects, prioritizing the testing of lubricating grease using a stability roller and relying on standardized methods such as ASTM D1831 and MIL-G-10924SA helps maintain equipment efficiency, longevity, and precision.

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