|
K94500
ROF Grease Tester
The ROF Grease Testing Machine determines both the useful life and high
temperature performance limits for a lubricating grease in a small,
lightly- loaded deep-groove ball bearing test. The test sample is run
at different temperatures and speed, and then results can be used directly
for calculation of the grease life in actual lubricated-for-life DGBB
applications such as in electric motors. To conduct a test, the standard
6204/C3 test bearings with separate shields are prepared and lubricated
with a standard quantity of the test grease. Two bearings are properly
mounted in each test station for up to five (5) stations and then slowly
brought up to the test temperature. Each bearing set is individually
temperature-controlled by means of a thermocouple. When the test temperature
deviates by 20°C from the preset test temperature as a result of
bearing failure, the particular station involved will be switched off
automatically. The other stations will continue running, and a counter
monitors the total number of hours each station has run. From the number
of running hours, the median grease life (L50, the time at which 50%
of the bearings fail due to inadequate lubrication), grease life (L10,
the time at which 10% of the bearings fail), and the Weibull Exponent
ß (the measure of the spread in grease life) using the Weibull
Software Package. From the results obtained, a calculation can be made
how bearings will behave in practice as well as a relubrication interval.
The test bearings 6204/C3 are normal production bearings and are the
only component that has to be renewed for each test, keeping the overall
cost at a minimum.
Specifications
Conforms to the specifications of: DIN 51806
Bearing
Type: 6204-2Z/C3, normal filling degree
Standard Shaft Speed: 10,000 rpm
Optional Shaft Speeds: 6,000 and 20,000 rpm
Test Temperature: ambient to 170 °C
Radial Load: 50N / bearing
Axial Load: 100N / bearing
Dimensions lxwxh,in.(cm)
Control Unit: 25.5x17.75x36.5 (65x45x93)
Bearing Testing: 69x35.5x10.5 (175x90x27)
Net Weight: 759 lbs (345kg)
Shipping Information
Shipping Weight: 935 lbs (425 kg)
Dimensions: 35 Cu. ft.
|
