
Dear Mr. Bazarah,
Sorry, I can't help in this topic.

Hi
( Initial wt of wear -- ( Final wt of wear parts
parts during installation in gms during removal in gms)
Wear Rate ( gm/MT of material) = ----------------------------------------------------------
Total material crushed/ground during period in MT
In case of hammer crusher the wear parts considrered are the hammers, wheres the blow bars are considered for impact crusher
For VRM, the rollers as well as the table wears are calculated individually as well as totally
Regards
Vinayagamurthi.K

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Regards
Alex