14 N New since T ool Manual 21 N New in the PFERD pr oduct line 2012 N e w i n t h e P F ER D P r o d u c t L i n e 2 0 4 C O MB I D IS C G r i n d i n g T o o l s C D C D R Diameter D Inches Grit and EDP Number Recom Speed RPM 60 80 120 180 T ype CD N 238 42117 42118 42119 42120 7500 11000 50 T ype CDR N 238 42425 42426 42427 42428 7500 11000 50 The scallopededge patter n of COMBIDISC ACONTOUR eliminates edge cutting The abra sive discs easily follow transitions and contours on complex work pieces Especially suitable for working tight contours and concave surfaces with radius transitions The special outer contour pr events the tools cutting in to the workpiece Abrasive Aluminum Oxide A Recommendation for Use COMBIDISC aluminum oxide ACONTOUR abrasive discs achieve their best output at the r ecommended peripheral speed of 4000 6900SFPM Or dering Note W e r ecommend using soft or medium 2 dia meter abrasive disc holders to beneft fully fr om the fexibility of these abrasive discs Please or der backing pad separately listed on page 18 of section 204 in T ool Manual 21 PFERD Speci fcation Number CD ACONTOUR CD CDR D 1 COMBIDISC Abrasive Discs Aluminum Oxide ACONTOUR