0 votes 0 votes The base of a brass bracket needs rough grinding. For this purpose, the most suitable grinding wheel grade specification is $C30Q12V$ $A50G8V$ $C90J4B$ $A30D12V$ Materials, Manufacturing and Industrial Engineering gateme-2020-set1 materials-manufacturing-and-industrial-engineering machining-and-machine-tools-operations + – go_editor asked Feb 19, 2020 • recategorized Mar 6, 2021 by Lakshman Bhaiya ♦go_editor 5.0k points answer See all 0 reply