1A1 diamond grinder wheel is the most oftenly used grinding wheel,rough grit usually use 60# and 80#,medium rough grit usually use 120#,150#,180#, and fine grit is usually 240#,280#,320# and so on.Mostly,if you choose one grit/grain size,use medium rough grit can meet your requirement.If you want gind fast,use rougher grit,if you want a good surfacing result,choose fine grit.Well,what should I do if I want grind fast and have good finishing result.Use two or three grit.Use rough grit first,then fine grit.The smaller number is the rougher grain,the bigger number the finer grain.
Need this or other customized grinding tools,feel free to contact.
Brand:forturetools web: http://www.forturetools.com
Main Products:grinding wheels/other abrasive tools
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