When selecting a grease, the size of the grease taper should be considered.
When the mechanical friction surface load is large, should use a small degree of lubricating grease, otherwise it will not be able to support the load and be extruded;
If the friction surface load is very small, should use a large degree of lubricating grease, otherwise it is not easy to form a complete oil film, or friction resistance is too large, loss of power, and easy to cause overheating parts.
Usually no. 2, no. 3 and No. 4 greases are suitable for ordinary machinery due to their hardness and softness.
SD2801C thermostatic needle entry meter is designed and manufactured in accordance with the technical requirements and relevant regulations in GB/T269 of the People's Republic of China standard "Determination of Coning Degree of Lubricating Greases and Petroleum Greases" and GB/T4509. It is mainly applicable to the test of needle entry degree of asphalt and grease (or petroleum grease).
This instrument can also be used for the inspection of solid fine grain, powder, colloid, jelly and other materials, as well as food raw materials such as cheese, sugar gum, butter, wheat gluten, cream and fermentation, etc. It can be widely used in food industry, traffic highway engineering and other industrial sectors.
I. Main technical features
1. Digital display is adopted to display the coning degree value, which is intuitive and eye-catching.
2, with the lifting frame coarse adjustment, fine adjustment function, easy to adjust, accurate needle.
3. Equipped with heating and constant temperature bath, water bath temperature automatic control, cost-effective equipment.
Ii. Main technical parameters and indicators
1. Measurement range: 0 ~ 600 coning degree (0-60mm is displayed in the digital display table);
2. Coning time control device:
The time can be set arbitrarily according to their own needs, and the time error is less than ±0.1 seconds;
3, resolution is 0.01㎜;
4. Needle insertion accuracy: ±1 degree of coning;
5. Temperature measuring range: 10 ~ 50 degrees (equipped with semiconductor cooling cycle device, which can be heated or refrigerated);
6. Temperature control accuracy: 25±0.1℃;
7. Temperature control mode: high-precision digital temperature controller, which can maintain a constant temperature up to 25 degrees as required by standards;
8. Standard cone: 102.5±0.05g, which conforms to the specification requirements of national standard GB/T269;
9. Lifting support: Double lifting adjusting mechanism of coarse adjustment and fine adjustment makes it easy for the needle tip to align with the sample plane;
10. Others: Equipped with cold light source, easy to use and operate.
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