Answer
Nov 27, 2024 - 12:41 PM
Venev uses the GOST 9206-80 standard.
GOST 9206-80 (for diamonds) uses an intuitive naming system for grit values: it directly indicates the main grit range. There are also adjacent and threshold ranges.
One of the features of the GOST 9206-80 classification is its easy-to-remember approach for all three ranges: main, adjacent, and threshold. It is only necessary to remember the micron sequence 1 – 2 – 3 – 5 – 7 – 10 – 14 – 20 – 28 – 40 – 60 for microgrits. The adjacent pair of numbers will be the main range for the same grit value (for example, 3/2 has a main range of 3 to 2 µm). The adjacent range is one step down (1 to 3 µm). The threshold range is another step down and one step up (0 to 5 µm).
Knowing this fact, now have a look at the Grit chart in the link below:
https://www.gritomatic.com/pages/grit...
You'll see that the GOST 9206-80 rating of 3/2 equates APPROXIMATELY to a JIS R 6001 rating of between 4000 and 6000 grit. This, however is only an approximation because the grit ratings, their tolerances and adjacent value ranges are very different. In many cases, some "equivalent" grit powders outperform a JIS 6001 powder due to the difference ratings used.
JIS ratings have very different values and wider allowed tolerances than some other grit ratings, in some cases worse than other ratings and in some cases better, so it is near impossible to exactly compare grit ratings with a definitive answer.
Another important fact to remember is that compounds on strops are less aggressive than compounds in hard bonds. This gives the stopping compound a scratch pattern significantly smoother than an equal grit in a hard bond.
I suggest reading this informative write-up for a better understanding of grit ratings and their tolerances.
https://www.gritomatic.com/pages/grit...
GOST 9206-80 (for diamonds) uses an intuitive naming system for grit values: it directly indicates the main grit range. There are also adjacent and threshold ranges.
One of the features of the GOST 9206-80 classification is its easy-to-remember approach for all three ranges: main, adjacent, and threshold. It is only necessary to remember the micron sequence 1 – 2 – 3 – 5 – 7 – 10 – 14 – 20 – 28 – 40 – 60 for microgrits. The adjacent pair of numbers will be the main range for the same grit value (for example, 3/2 has a main range of 3 to 2 µm). The adjacent range is one step down (1 to 3 µm). The threshold range is another step down and one step up (0 to 5 µm).
Knowing this fact, now have a look at the Grit chart in the link below:
https://www.gritomatic.com/pages/grit...
You'll see that the GOST 9206-80 rating of 3/2 equates APPROXIMATELY to a JIS R 6001 rating of between 4000 and 6000 grit. This, however is only an approximation because the grit ratings, their tolerances and adjacent value ranges are very different. In many cases, some "equivalent" grit powders outperform a JIS 6001 powder due to the difference ratings used.
JIS ratings have very different values and wider allowed tolerances than some other grit ratings, in some cases worse than other ratings and in some cases better, so it is near impossible to exactly compare grit ratings with a definitive answer.
Another important fact to remember is that compounds on strops are less aggressive than compounds in hard bonds. This gives the stopping compound a scratch pattern significantly smoother than an equal grit in a hard bond.
I suggest reading this informative write-up for a better understanding of grit ratings and their tolerances.
https://www.gritomatic.com/pages/grit...
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