V [m/sec] 50 63 80 100 rpm 19100 24100 30600 38200 12700 16000 20300 25400 9550 12100 15300 19100 8680 10940 13890 17360 8350 10500 13300 16650 7650 9650 12250 15300 6400 8050 10200 12700 5350 6700 8500 10650 4200 5250 6650 8350 CONTENTS Cleaning Milling Fine grinding/ polishing Diamond tools Occupational safety Grinding Cutting EN 2024/2025 GRINDING WORKING SPEED The maximum permissible working speed is shown on each grinding tool in m/s. GRINDING DISCS The hardness of a grinding disc determines the lifetime as well as its stock removal and stock-removing efficiency. A soft grinding disc is much more aggressive and offers a comfortable grinding behaviour. A hard grinding disc is characterised by its long lifetime. We recommend hard grinding discs for edge grinding. Soft grinding discs can be used for surface grinding. RHODIUS grinding discs are made in a thickness of 7 mm and with a special top layer. Grinding discs, unlike flap discs, are characterised by their high stock removal and cutting efficiency as well as lifetime. RHODIUS pipeline grinding discs are manufactured to a thickness of 4 mm. Pipeline discs are produced without a top layer, so as to ensure optimum performance on root seams even in circumferential grinding. We recommend the use of flap discs for more comfortable surface grinding. You will find these from page 126 onwards. TYPICAL APPLICATIONS s Weld seam preparation s Burr removing s Corner and edge grinding s Levelling of welding seams ADVANTAGES OF THE SPECIAL TOP LAYER s Almost no edge cracks s Circular, low-vibration running s Uniform wear Cup wheels = 50 m/s Shape 11 Grinding discs = 80 m/s Shape 27 d1 [mm] 50 75 105 110 115 125 150 180 230 099
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