Cordless power drills are classified by voltage – the higher the voltage, the more speed and torque available. Most models will have adjustable torque and a keyless chuck.
Corded drills are classified by wattage and follow the same idea as cordless drills - the higher the wattage, the greater available torque and speed. They also generally feature a hammer function which aids drilling through masonry.
- You should always wear proper safety glasses
- Never wear loose clothing or dangling jewellery which could catch in the drill as you lean over it
- Always unplug a corded drill before changing bits
- Don't forget to remove the chuck key, if it doesn’t have a keyless chuck, before switching on the drill
When drilling wood, drill a smaller hole prior to screwing or using a large drill bit. This will help prevent the wood splitting.
For metal, an automatic centre punch provides starting point for the drill bit and stops it wandering around the metal ruining the surface.
No matter what the surface a handy tip is to use masking tape to mark maximum depth on the drill bit.
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