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As a minimum, this should always include suitable goggles or glasses, an appropriate dust mask for the material being cut, and good quality work gloves If you want to drill a hole clean through a workpiece, be aware that going directly from one side through to the other with a hole saw can create a lot of ‘blowout’ (material tearing) on the reverse side You should never attempt to bore holes through masonry or heavier timber (anything over about 50mm) with a battery-operated drill This is due to the width of the hole cutter bit, and the subsequently large amount of material being removed Be aware that going in at a slightly off-centre angle - or hitting a nail while drilling - can cause very sudden and violent binding/jamming of the drill when using a hole saw
Cordless models can get the job done on thinner or softer materials, but you’ll require at least a 14V model Ensure you cut directly down into the workpiece at an accurate perpendicular (90-degree) angle to the surface
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They will generally extend anywhere from 10-30mm out beyond the open cutting end of the hole saw, and may also incorporate an ejector spring mechanism for helping to jettison plugs of loose material build-up
Regardless of the material or surface you’re working on, never try to force the drill bit through any faster than it wants to go