Diamond and boron nitride tools - joke Technology GmbH - #4

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301 3 i Tel. +49 (0) 22 04 / 8 39-0 • Fax +49 (0) 22 04 / 8 39-61 • info@joke.de 3. Diamond and boron nitride tools Diamond and Boron nitride tools Interesting facts Max. speed depending on cutting speed and tool diameter Ø 10 15 18 20 22 25 30 35 40 45 50 55 60 mm m/s m/s m/s m/s m/s m/s m/s m/s m/s m/s m/s m/s m/s 20 9550 14300 16800 19100 21000 23900 28700 33400 38200 43000 47800 52600 57400 30 6300 9500 11200 12700 14000 15900 19000 22300 25400 28500 31800 34800 38000 40 4800 7200 8500 9600 10500 11900 14300 16700 19100 21500 23800 26200 28600 50 3800 5700 6800 7600 8300 9500 11400 13400 15300 17000 19000 20900 22800 75 2500 3800 4550 5100 5550 6400 7700 9000 10200 11600 12800 14100 15400 100 1900 2900 3500 3800 4300 4800 5700 6700 7650 8600 9600 10500 11400 125 1500 2300 2700 3000 3300 3800 4600 5300 6150 6900 7600 8500 9200 150 1260 1800 2300 2500 2800 3200 3800 4500 5100 5700 6400 7000 7600 175 1080 1600 1900 2200 2420 2700 3300 3800 4350 4950 5400 6050 6600 200 950 1400 1700 1900 2100 2400 2900 3400 3850 4350 4800 5300 5800 250 750 1150 1360 1500 1650 1900 2300 2700 3100 3450 3800 4200 4600 300 640 950 1150 1300 1400 1600 1900 2200 2550 2850 3200 3500 3800 Concentration (for grinding discs with resin and metal bonding) The concentration is indicated in carat/cm3. This value represents the ratio between the weight of the diamond/boron nitride and the coating volume. Three concentrations are generally proposed: C50, C75 and C100. The concentration C75 contains 3.3 carat per cm3 grinding layer. 1 carat = 0.2 g 1,5 ct 2,0 ct 2,2 ct 3,0 ct 3,3 ct 4,0 ct 4,4 ct 5,5 ct 6,6 ct C 35 45 50 68 75 90 100 125 150 Grit/roughness ratio (for grinding discs with resin bonding) The table opposite shows the approximate possible surface roughness values that can be achieved with the various grits. The surface roughness is heavily influenced not only by the grit, but also by the grinding conditions, e.g. machine rigidity. 0,05 0,1 0,2 0,4 0,8 1,6 3,2 7 15 54 76 107 181 Ra Gritsize