1443 RECOMMENDATIONS FOR BUR USE • It may be necessary to adjust the speeds shown to achieve optimum performance. • Harder materials require slower speeds. • Smaller burs require faster speeds. • Extra long burs (>150 mm or 6" long) require slower speeds. • Apply constant movement and light pressure when in use. • Running below the optimum speed will encourage chipping. • Running above the optimum speed will cause tooth wear. • Allowing the tool to become too hot may cause the braze to melt and detach the head from the shank. • Using tools and collets that have become worn will encourage chipping. • Do not sink the bur for more than one third of its periphery. Cutting speed for solid carbide drill for locksmiths Art. 12399 and 22399: 750-800 rpm SAFETY RECOMMENDATIONS Wear ear protection Wear protective mask Wear safety glasses Wear protective gloves Read instructions 11 Index 10 9 OIL 8 7 6 5 4 3 2 1
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