... '', 1 1/4''x3/16'', 1 1/2''x3/16'', 1''x1/4'', 1 1/4''x1/4'', 1 1/2''x1/4'', 1''x1/8'', 1 1/4''x1/8'', 1 1/2 ... ''x1/8'' etc 2Bearing Bar Pitch12.5, 15, 20, 23.85, 25, 30, 30.16, 30.3 ... , Serrated /teeth, I bar, serrated I bar 7StandardChina: YB/T 4001.1-2007, USA: ANSI/NAAMM(MBG531-88),UK: BS4592-1987, Australia ...