Coated abrasives grading systems: FEPA, mesh, micron

[Rogier]

Hi all,

I am looking for a conversion table or formula's to compare different coated abrasive belts.

I understand the Fepa grading system is commonly used in Europe (P-number). Also used (especially by older employees) is the term "mesh". The manufacturers of new fine abrasives tend to use their own grading systems, based on grain size. I am not sure if the ISO standards use the micrometer grading system. On different websites I can find some conversion tables, but it does seem these are not exactly the same.

Any complete table would be very much appreciated.

Regards, Rogier


Note: This question was asked before by chin chew on the old forum.

https://www.gordonengland.co.uk/cgi-bin/.../1385.html

Posted by chin chew (192.249.41.3) on June 22, 2004 at 07:49:51:

Been studying into Media blasting and abrasive.
Came across this four terms. Grit, Mesh, Grade and micrometer. Can anyone give me a proper defination of each term wrt Media blasting and abrasive. Plus where can i get a recognized conversion table of the above mentioned. Thanks.

[Gordon]

Hi Rogier

It is all a bit confusing, what with all the different standards and different manufacturer gradings. Best to relate to particle diameter in micrometres (microns).

A few links (which may or may not help)

(link dead)

Wikipedia - Mesh

(links dead)

[Rogier]

Sorry for this late reply, but thanks for these links. Some time to go before they get a worldwide standard.

[Gordon]

Hi Rogier

To some extent the standards exist, we just need everybody to read from the same sheet.