铁片的底板

base plate functional: Made according to sandard JB/T7974-99 , rib type or case type ,recangle/round surface , working surface made by skiving ,groove V/T/U shape and hole of longround shape can be made at the surface of the plate .The surface plate is a plane standard equipment used for testing and drawing of work pieces on it ,The surface plate shall be adjustable to horizontal positaion and laded evenly on each pivot , Environmental temperatire(20±5),and vibration shall be avoided when using base plate specification:Type(mm) Precision Grade(μm) 1 2 3 Final Machining 2000*1000 20 39 96 1500*1000 24 48 120 1500*1500 25 50 125 2000*2000 26 52 129 2000*1500 56 140 2000*2000 60 152 2500*1500 64 152 2500*2000 68 168 2500*2500 72 180 230 3000*1000 168 230 3000*1500 174 254 3000*2000 184 275 3000*2500 186 276 3000*3000 210 300 4000*1000 210 300 4000*1500 210 300 4000*2000 219 340 4000*2500 228 340 4000*3000 240 360 5000*1500 249 370 5000*2000 255 375 5000*2500 264 390 5000*3000 287 420 6000*1500 287 420