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Powered Hand Tools - Drills

How do you select the proper bit or attachment? Follow manufacturers' instructions when selecting and using bits or attachments, especially with unfamiliar drills or work.

How do you select the proper bit or attachment?

context Follow manufacturers' instructions when selecting and using bits or attachments, especially with unfamiliar drills or work.
context match the size and capacity of the drill.
context are appropriate for the material and the type of work.
context Select bits or attachments that:
context are properly seated and tightened in the chuck.
context turn true to avoid vibration or imbalance.
context Ensure all bits or attachments:
context Use the auxiliary (second) handle for large-scale work or continuous operation.

What should you do when working with powered hand drills?

context Wear safety glasses or a face shield (with safety glasses or goggles).
context Keep drill air vents clear to maintain adequate ventilation.
context Keep drill bits sharp.
context Inspect for frays or damage before each use.
context Keep all cords clear of the cutting area during use.
context inspect the battery for any damage, cracks, or leaks before use.
context follow the manufacturer's instructions for charging and storing the battery. Avoid overcharging or exposing it to extreme temperatures. See the OSH Answers on Battery Charging - Lithium-ion Batteries for more information.
context If using a battery-powered drill:
context Disconnect the power supply before changing or adjusting bits or attachments.
context Tighten the chuck securely. Remove the chuck key before starting the drill.
context Secure workpiece being drilled to prevent movement.
context Slow the feed rate just before breaking through the surface to prevent damage.
context Drill a small "pilot hole" before drilling large holes to improve accuracy and to reduce stress on the bit.

What should you do when working with small pieces?

context Clamp small stock securely to prevent twisting or spinning.
context Never drill with one hand while holding the material with the other.

What should you avoid when working with powered hand drills?

Refer to Powered Hand Tools - Basic Safety for Electric Tools for general safety tips.

requirement Do not use bent drill bits.
requirement Do not exceed the manufacturer's recommended maximum drilling capacities.
requirement Do not use a hole saw cutter without a pilot drill.
requirement Do not use high-speed steel (HSS) bits without cooling or using lubrication.
requirement Do not attempt to free a jammed bit by starting and stopping the drill. Unplug the drill and then remove the bit from the workpiece.
requirement Do not reach under or around the stock being drilled.
requirement Do not overreach. Always keep proper footing and balance.
requirement Do not raise or lower the drill by its power cord.
requirement Do not use the drill in wet or muddy locations. Use a nonpowered drill instead.
requirement Do not use excessive force to drill into hard material. Reduce drill speed if possible.
requirement Do no use