Significance and Use
In general, the dropping point is the temperature at which the grease passes from a semisolid to a liquid state under the conditions of test. This change in state is typical of greases containing as thickeners soaps of conventional types. Greases containing as thickeners materials other than conventional soaps can, without change in state, separate oil. This test method is useful to assist in identifying the grease as to type and for establishing and maintaining bench marks for quality control. The results are considered to have only limited significance with respect to service performance as dropping point is a static test.
I. Summary
GD-4929A Dropping Point Analysis Instrument is designed and made as per the national standard of People’s Republic of China GB/T 4929 Test Method for Dropping Point of Grease. It is suitable to determine the dropping point of grease as per GB/T 4929.
II. Main technical specifications and parameters
- Power supply: AC 220 V±10%, 50 Hz
- Oil bath: it is a 600 ml beaker.
- Grease cup: it is made of chrome plated brass. Its inner diameter is about 9.92 mm and the diameter of orifice for dropping oil is 2.8 mm. The height of the cup is about 12 mm.
- Test tube: it is a tube of heat-resistant glass, with rim. Its inner diameter is 11.1 mm to 12.7 mm. There are three indentations at about 19 mm from the bottom, equally spaced on the circumstance. These indentations are used for supporting the grease cup.
- Thermometer: the temperature measurement range is -5°C~300 °C, and its graduated scale is 1 °C. Its total length is 390 mm and the depth immersed is about 76 mm.
- Heater: tubular, and its power is about 800 W.
- Stirring motor: its rotation speed is 60 RPM
- Ambient temperature: -10°C~+40 °C
- Relative humidity: =85%
10.Total power consumption: =900 W
