Test Method
The purpose of the test is to measure the ability of a grease to lubricate at various high speeds, temperatures and axial loads. The grease quality is measured by recording the number of running hours before the grease ceases to lubricate and, as a consequence, the bearings fail. The longer the number of running hours in the test unit, the more effectively the grease lubricates under those conditions. In this way the maximum operating speed, temperature and load for a particular grease can be determined.
Specifications
Spindle Speed:
K94800/K94890: 60,000 RPMK94801/K94891: 75,000 RPM
Test temperature:Up to 230 °C
Axial test load:50 to 1 100 N/bearing
Drive:high-speed spindle
Operating system:Windows 7
Evaluation system:Industrial panel PC
Test bearingsFor pure high-speed grease testing (synthetic cage):7005For high-temperature/speed testing (metal cage):6204 shields delivered separately in the package
Grease filling gradesFor pure high-speed grease testing:10 to 15% of the free volume 0,71 to 1,06 cm3For high-temperature/speed testing:20 to 30% of the free volume, 1,4 g corresponds to 30% when the specific weight is in a range of 0,9 to 1,0 g/cm3
Test parametersFor pure high-speed grease testing:Speed rating for grease acc. 50,000 RPM = 1,8 mill. n × DmMaximum spindle speed possible 60,000 RPM = 2,16 mill. n × DmMaximum spindle speed possible 75,000 RPM = 2,7 mill. n × DmAxial load 50 to 350 N load applied pneumaticallyAmbient temperatureSpeeds and loads freely selectable and changeable during test duration
For high-temperature/speed testing:Test bearing with shields or without shieldsSpeed rating for grease acc. 32,000 RPM = 1,072 mill. n × DmMaximum spindle speed possible 60,000 RPM = 2,01 mill. n × DmMaximum spindle speed possible 75,000 RPM = 2,7 mill. n × DmAxial load 50 ... 1,100 N load applied pneumaticallyTemperature up to 230 °CSpeeds, temperature and loads freely selectable and changeable during test duration
Alat Laboratorium Umum