Shear Stability Testing Machine
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KRL
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
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
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