Zec Industry Ltd.

ZHEJIANG, China

We are offering high speed steel bi-metal hole saws are rugged cutting tools designed to cut accurate holes in machinable materials up to 1-3/8'', 35mm thick. Ranging in size form 9/16", 14mm to 6'', 152mm in diameter, they can be uses in portable electric, air tools, drill presses, lathes, boring mills, milling machines or any other machine which has a rotating spindle. hole saws have 4/6 vari-pitch tooth design and are recommended for cutting steel and cast iron pipe, steel plates, aluminium, copper, brass, stainless steel, wood and plastics, furnished in standard size as listed and in handy assortments. important! (r/min) dia. Mild steed stainless steel cast iron brass aluminum wood 14 580 300 400 790 900 3000 16 550 275 365 730 825 3000 17 500 250 330 665 750 3000 19 460 240 300 600 690 3000 20 435 230 290 580 660 3000 21 425 210 280 560 635 3000 22 390 195 260 520 585 3000 24 370 185 245 495 555 3000 25 350 175 235 470 525 2700 27 325 160 215 435 480 2700 29 300 150 200 400 450 2700 30 285 145 190 380 425 2400 32 275 140 180 360 410 2400 33 260 135 175 345 390 2400 35 250 125 165 330 375 2400 37 240 120 160 315 360 2400 38 230 115 150 300 345 2400 40 220 110 145 290 330 2100 41 210 105 140 280 315 2100 43 205 100 135 270 305 2100 44 195 95 130 260 295 2100 46 190 95 125 250 285 2100 48 180 90 120 240 270 2100 51 170 85 115 230 255 2000 52 165 80 110 220 245 2000 54 160 80 105 210 240 2000 57 150 75 100 200 225 2000 59 145 75 100 195 225 2000 60 140 70 95 190 220 2000 64 135 65 90 180 205 1800 65 130 65 85 175 200 1800 67 130 65 85 170 195 1800 68 130 65 85 170 195 1800 70 125 60 80 160 185 1800 73 120 60 80 160 180 1800 76 115 55 75 150 170 1500 79 110 55 70 140 165 1500 83 105 50 70 140 155 1500 86 100 50 65 130 150 1200 89 95 45 65 130 145 1200 92 95 45 60 120 140 1200 95 90 45 60 120 130 1200 98 90 45 60 120 135 1200 102 85 40 55 110 130 1000 105 80 40 55 110 120 1000 108 80 40 55 110 120 900 111 80 40 50 100 120 900 114 75 35 50 100 105 900 121 70 35 45 95 95 900 127 65 30 40 90 90 800 133 65 30 45 90 90 800 140 60 25 40 85 85 800 146 60 25 40 85 85 800 152 55 25 35 75 75 800 for sale use of hole saws use the correct rotation speed. The correct speed for each size is given in the table. for longer saw life and lower operating costs, the following recommendation need to be observed: 1.use the correct arbor for the size saw to be used. 2.use pin-type arbors for hole saws larger than dia.32. When mounting, lift up the disc with the pins and then screw the arbor down into the hole saw as far as it will go. Fit the drive pins into the pin holes in the hole saw by turning the hole saw backwards. Push the pins in .check that they are securely locked. 3.check regularly to make sure the drive pins are in the right position. 4.check that the arbor shank is securely inserted in the chuck on the drive unit. Tighten with chuck key. 5.cutting oil should be used when sawing steel. do not use cutting oil when sawing cast iron. The cutting pressure should, however, be high so that each tooth cuts deep. paraffin can be used when sawing aluminium. 6.use the correct rotation speed! too high or too low a speed will decrease the life of the cutting edge. 7.if the hole saw vibrates during sawing, the teeth may became damaged and break. The result is often a rough, imperfect hole. 8.apply the hole saw perpendicular to the workpiece. If the hole saw is titled, this will cause uneven loading and abnormal wear on both the saw teeth and the grilling machine. Moreover, the dimensional accuracy of the hole saw can be affected. 9.clear away chips and slugs frequently in order to prevent overheating.