Relevant Precision Test Report Of Coal Mining O-type Oil Seal Products
Dec 10, 2021
In the sealing industry, a sealing product has a strict inspection and control system from product development, test inspection to production.So, what kind of test items are there for O-type oil seals (referred to as O-rings) for coal mining machinery and equipment?Dongsheng Seal will tell you that the test and inspection items of the O-type oil seal for coal mining machinery include appearance quality, oil seal diameter + section diameter, hardness, and rubber performance testing (tensile length and elongation at break, hot air aging test , compression set rate, oil resistance and other test inspections).
The specific test items are as follows:
I.Appearance quality inspection: oil seal, O-type oil seal.
Appearance quality inspection can be implemented with reference to the provisions formulated by the Chinese National Standard GB/T 3452.2-2007 (For reference).
II.Inner diameter, section diameter: oil seal, O-type oil seal.
1.The inner diameter DI of the O-type oil seal is measured three times with an SM flexible ruler or a precision diameter dimension (JI ruler) (Take the average value).
2.The outer diameter DO of the O-type oil seal is measured three times with a tablet computer and a dial indicator or a micrometer and a vernier caliper with a division value of 0.02 (Take the average value)
III.Hardness test: O-rings
Shore A type rubber durometer for hardness testing, measured at three places along the circumference (Take the average value).
IV.Performance test of oil sealing compound:O-type oil seal.
1.Determination of tensile length and elongation at break (refer to Chinese National Standard GB/T 528-1998 for measurement).
2.Hot air aging test detection (refer to Chinese Sational standard GB/T 3012-2001 for measurement).
3.Compression set rate detection (refer to the Chinese national standard GB/T 7759-1996 for determination).
4.Oil resistance test (refer to Chinese national standard GB/T 1690-2006).
If you want to know more professional knowledge about O-type oil seals, please enter the official website of Dongsheng Seals.
