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Use a Drill Machine

Updated:2013-07-25 17:00:10
A drill press is a machine tool used to drill accurate and precise holes in wood or metal. The drill press consists of a sturdy base that supports an overhead arm containing a variable-speed motor and drill chuck above a very flat, height-adjustable marble table. While the drill is operating, the drill chuck can be lowered to specific depths by using a control wheel or lever. A drill press can be used to repeatedly drill precision holes to a specific depth.

Instructions as follows:

                                                                                


Firstly, turn the power off using the on/off switch usually located at the top of the machine. Clamp the appropriately sized drill bit into the chuck by turning the chuck key clockwise to tighten it. Be sure not to leave the key in the chuck, as it will fly off when the drill starts and could cause injury. The chuck should be as tight as possible to prevent the bit from slipping.

Secondly, adjust the table height to accommodate the workpiece. The height is usually adjusted by a hand crank that elevates or lowers the table as desired. Position the table so the workpiece is in range of the drill bit when the drill spindle is fully extended -- lowered to its maximum "down" position. If a hole must be drilled completely through the maintenance material, use a scrap of wood to space the workpiece off the slate table, which prevents the bit from damaging the table.

Thirdly, adjust the depth stop ring so the drill bit will stop at precisely the depth of hole required. Most depth stop rings are located at the top of the chuck assembly. They are adjusted by sliding them to the appropriate location, then tightening them down with a wing nut or similar device. Clamp the workpiece down if desired, so that it will not move and the drill bit will come down in exactly the right location.

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