Shear Stability Testing Machine

Shear stability tester (KRL) for determining the mechanical shear stability of lubricating oils

KRL

Shear Stability Testing Machine

Shear stability tester (KRL) for determining the mechanical shear stability of lubricating oils

The tapered roller bearing shear test (KRL test) is a specialized method designed to assess the mechanical stability of lubricants under high shear conditions. Conducted according to the DIN 51821 standard, this test evaluates a lubricant’s ability to maintain its consistency (shear stability) over extended periods of use. It is especially suited for lubricants that must endure extreme mechanical shear and high temperatures.

Applications

Automotive gear oil
Industrial gear oil
Multi-grade engine oil
Automatic transmission fluid
High-pressure hydraulic oil
Lubricating grease

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Technical Specifications

Drive mode	Direct drive
Loading method	Fully automatic loading
Load range	98-9800N
Spindle radial runout	≤0.01mm
Motor type	Servo motor
Motor power	2kW
Rotation speed	50-3000r/min
Operation control method	Manual control, time control, limited friction force, limited friction coefficient
Heating & cooling system	Thermostatic system (temperature control accuracy 0.02℃)
KRL oil cup heating range	-10 to 120℃

Standards

NB/SH/T 0845-2010
Measurement of Viscosity Shear Stability of Transmission Lubricants (Tapered Roller Bearing Testing Method)
CEC L-45-A-99
Viscosity Shear Stability of Transmission Lubricants
DIN 51350-6
Testing of Lubricants - Testing in the Shell Four-Ball Tester - Part 6: Determination of Shear Stability of Lubricating Oil Containing Polymers