SH/T 0122-1992 Determination of Roll Stability of Lubricating Grease

AI-translated method card — human verification pending. This is not an official translation of the standard. Unclear source values remain unverified; check the original standard and product certificate before use.

Card type: Test method

1. Method number / full name / English name / replacement relationship

• Method number: SH/T 0122-92 (confirmed in 2004)
• Chinese full name: Determination of Roll Stability of Lubricating Grease
• English name: not provided in the available source
• Replacement relationship: From the date of implementation of this standard, the original national standard GB 2359-80(88) "Determination of Roll Stability of Lubricating Grease" is void.
• Reference adoption: American Society for Testing and Materials standard ASTM D1831-88 "Determination of Roll Stability of Lubricating Grease".

2. Scope of application and non-applicability

• This standard specifies the determination of the mechanical stability of lubricating grease using a roll test machine.
• This standard is applicable to the determination of the consistency change of lubricating grease after working on a roll test machine, to judge the mechanical shear stability of lubricating grease.
• Not applicable: not provided in the available source.

3. Method principle

Using a sample, at room temperature (21～38℃), after working on a roll test machine for 2h, determine the worked penetration of the lubricating grease before and after the test.

4. Reagents and materials (purity / preparation)

• Rubber industry solvent naphtha.
• Purity, preparation: not provided in the available source.

5. Instruments and equipment

• 5.1 Roll test machine: rotation speed 165 r/min～15 r/min (requires confirmation against the source standard (source-text extraction), the original text is "rotation speed 1 6 5 r / m i n - j - 15r/min", suspected to be 165 r/min±15 r/min).
• 5.2 1/4 Penetrometer: complies with GB/T 269.
• 5.3 Scraper.
• 5.4 Thermometer: temperature range 0～100℃, graduation value 1℃.
• 5.5 Tray balance: sensitivity 0.5g.
• Roll test machine structure (original figure caption): 1- steel cylinder; 2- idle pulley; 3- chain or direct drive; 4- driving pulley; 5- box (motor cover); 6- motor; 7- driven pulley.
• Roll test machine figure caption parameters: inner surface of cylinder 0.8/ (requires confirmation against the source standard (source-text extraction)); roller mass 5kg±50g; roller surface 0.8/ (requires confirmation against the source standard (source-text extraction)).

6. Recommended operating conditions

• Room temperature: 21～38℃.
• Rolling test time: 2h.
• Note: For 3 grade lubricating grease, the temperature may be increased to ensure normal operation; the specific temperature is specified in the product standard.

7. Sampling and sample preparation

• 6.2 Use a scraper to evenly coat 50g unworked sample on the inner surface of the cleaned test cylinder, then place the roller into the cylinder and tighten the cylinder cover.
• Other sampling requirements: not provided in the available source.

8. Analysis steps

• 6.1 According to the procedure described in Part 2 of GB/T 269, determine the worked penetration of the sample.
• 6.2 Use a scraper to evenly coat 50g unworked sample on the inner surface of the cleaned test cylinder, then place the roller into the cylinder and tighten the cylinder cover.
• 6.3 Install the roller, cover the box lid, start the instrument, and record the time and indoor temperature; the room temperature should be between 21～38℃.
• 6.4 After rolling test for 2h, take out sufficient sample from the cylinder, immediately place it into the 1/4 penetrometer worker. Then according to the method in Part 2 of GB/T 269, determine the worked penetration.
• 6.5 Record the worked penetration of the sample before and after the test.
• Note: Convert the measured 1/4 penetration value to the full-scale penetration value.

9. Qualitative and quantitative and calculation formula

The change in sample consistency is calculated according to the following formula: Worked penetration change = P₂ − P₁ Where:

• P₂—penetration value of the sample after the test;
• P₁—penetration value of the sample before the test.

10. Precision

Use the following provisions to judge the reliability of the results (confidence level of 95%).

• Repeatability: The difference between two results obtained by the same operator using the same instrument in repeated determinations shall not exceed the following value.
• Reproducibility: The difference between test results submitted by two laboratories shall not exceed the following value.

Note: The provisions for repeatability and reproducibility are derived from the values converted to full-scale penetration in Part 1 of GB/T 269.

11. Report

not provided in the available source.

12. Referenced documents

• GB/T 269 Determination of Penetration of Lubricating Grease and Petrolatum

13. Source and verification

This page is an AI translation of the available Chinese method card. Human verification is pending. It is not an official translation of the standard. Check the source standard and product certificate before use.

14. Quick Q&A