Mother's Drill Press Survey
(Page 2 of 3)
November/December 1985
By the Mother Earth News editors
Consider, too, the availability of multiple spindle speeds. If you'll be working with metal as well as wood, the drill bit must be capable of turning at a relatively low rate, normally in the hundreds of revolutions per minute (RPM). Wood boring requires a medium range, while dressing operations, such as shaping, demand the highest speeds.
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Practically speaking, a selection of four or five speeds that span a wide range of RPM may be more valuable than a lot of settings within a narrow scope. Look for a machine that can operate at between 500 and at least 4,000 RPM if you want maximum versatility; if you plan to use it only for drilling, a 2,000-RPM ceiling should be fine.
The tool's worktable warrants some attention, also. All tables slide up and down on the column, and pivot around it as well . . . but many manufacturers mount the work surface on an adjustable horizontal axis or offer a tilting and turning table as an accessory. This feature is well worth some additional expense, since it simplifies bevel drilling considerably.
Finally, satisfy yourself that the machine's capacities are sufficient to handle your intended work. Typically, a drill press is sized by its swing, or twice the distance from the column to the center of the chuck. Almost as often, manufacturers will simply state that their product will drill to the center of a given size workpiece.
The quill travel, or stroke, determines the single-pass depth of the bore; a range between 3 and 5 inches is satisfactory for full-size machines. Likewise, the capacity of the chuck dictates the size of the bit, though some manufacturers indicate that reduced-shank drills can be used to bore oversize holes in certain metals.
AND KNOW YOUR MACHINE
Like most any stationary shop tool, a drill press's weight is an advantage, especially in dampening internal vibration. A large, solid base-complete with floor-mounting holes and clamping slots—is always a bonus, as is a machine-ground cast-iron worktable. Check for heavy support ribbing in both platforms, and be sure the table has built—in cross slots and perhaps even a substantial clamping ledge at its perimeter.
