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Ocut 6542 High-Speed Steel Twist Drill Bit For Drilling Steel And Stainless Steel Special Super-Hard Hand Electric Drill Bit
About twist drill
1. Use a hand electric drill to drill the twist drill and process the material at a vertical angle of 90°
2. If the hole is larger than 60mm, first use a 3.2~4mm twist drill to drill the reserved hole and then use a large drill bit to enlarge the hole.
3. The electric drill chuck must tighten the drill bit. The shorter the twist drill, the better, and the drilling will be more stable.
It is better to control the tool rotation speed between 80 and 120. Drill bits and hole openers for drilling metal are characterized by low rotation speed and high torque. This makes it easier to cut. Once the rotation speed is high, it is no longer cutting, and the cutting edge There is no time for cutting, and the friction produces high temperature and burns the drill bit.
