Busch® 4203

Unit price. Busch Twist Drill, 4203 Series, Tungsten Carbide. Stem diameter: 2.34 mm, for pearls and corals. The fine grain carbide guarantees superior durability. The special construction with 4 grooves facilitates chip evacuation and reduces the risk of breakage. The use of a cooling product increases longevity. The uniform diameter of the shaft allows for a comfortable tool change. Before drilling center the workpiece. Drill at low pressure avoiding blocking and levering. Recommended rotation speeds: freehand 5.000 – 9.000 min-1 stationary 8.000 – 14.000 min-1