Tool type drill is as follows.Drill used for the hole to put screws or Spurs are as follows.1. Hand drill or drill gear used for punching small.2. Electric drill, a drill tool widely used at present. To penetrate materials such as concrete, cement, metal, wood and plastic, convenient use and fast. Because of electricity in work.3. Brace. There is a U-shape with cars spin must be used in conjunction with drill with size between. ¼ - 1 "is often used in wood.Bits have 3 type.1 drill bits of metal.- a HS High Speed drill used for drilling objects such as wood, plastic.- a HSS Hih Speed Steel drill used for drilling various types of steel such as steel plate, light steel tough cast iron with high hardness.2. Drill bits for mortar.3. Wood drill bit drill used to have many sizes. Applications must consider the speed to use drill - bit small, high - speed ในการเจาะ drill, large speed in drilling. Low.The use and maintenance.1. Secret drill, sharp, always using a grinding stone2. Take out and rotate the drill head to catch bits in place after every use.3. Apply the grease that gear and head catch drill once a month.4. Select bits for tooth root resorption and sharp clubs that suitable for the job.5. Choose the speed to suit the type of material, and the size of the hole to the drill.6. Should not hand pull the scrap metal in while drilling.7. If the drill hole should close the switch jammed with house immediately.8. Before drilling should be nailed iron lead center position to penetrate the first.9. Catch piece tightly.10. Should give sharp cut both started cutting in proper position.
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