Dongguan Taiwan welcome new and old customers to buy the British made a small twist Tsui

 Dongguan Taiwan English welcome new and old customers to buy custom processing: whether standard parts: standard parts Brand: Domestic Model: Complete are imported: No Material: HSS Category: Straight shank twist drill size (diameter * length): 0.5 * 65 Twist structural characteristics and the impact on machining (1) limiting aperture diameter twist drill by the spiral groove to make finer drill core, drill low stiffness; only two edges with guide, the easy axis of the hole deflection; Centering chisel so difficult, axial resistance increases, easy swing drills. Therefore, the drilled hole shape and position errors. (2) the twist is the rake face and the flank surface, the rake angle along the main cutting edge at each point, the angle is not the same as the front transverse edge of the angle -55 °. Cutting conditions are poor; distribution along the cutting edge of the cutting speed is unreasonable, the maximum intensity of the lowest point of a sword cutting so badly worn. Therefore, the hole machining accuracy is low. (3) the whole cutting edge of the drill cutting edges participants, each point on the cutting edge not equal, the chip is easy to form a spiral, chip difficult. Therefore, chips and the hole wall friction extrusion often scratch the hole wall, the surface roughness is low twist processed by the rotary cutting axis fixed relative to the workpiece hole drilling tools. Its capacity and shape into a spiral flute twist named. Helical groove has two grooves, slots or more grooves 3, but the most common two grooves. Twist can be clamped on the use of manual, electric handheld drill tools or drilling, milling machines, lathes and even processing center. Drill material is generally high-speed tool steel or carbide. The composition of the standard twist drill twist drill. Twist the handle, neck and working parts.