How to use a drill.1. the secret of drill ground by stone grinding.2. unplug the drill out and rotate the drill head after every use.3. grease the gear lash and Chuck drill once a month.4. Select drill, pecking at those teeth sharp and suitable for the job.5. Select the speed to suit the type of material and the size of the holes to be drilled.6. never use the tool, pull the scrap metal while drilling.7. If the drill jams with drilled hole should close immediately sawit.8. before drilling, according to the Center, the position should be hammered steel want to drill first.9. catch the workpiece firmly.10. cutting edge should both cut, punched in the correct position.
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