DeWalt DW100-220 manual Drilling in Metal, Drilling in Wood, Drilling in Masonry, Bubble Level

383945/DW100-220 5/3/02 1:15 PM Page 3

4.Always apply pressure in a straight line with the bit. Use enough pressure to keep drill biting, but do not push hard enough to stall the motor or deflect the bit.

5.Hold tool firmly to control the twisting action of the drill.

6.IF DRILL STALLS, it is usually because it is being overloaded or improperly used. RELEASE TRIGGER IMMEDIATELY, remove drill bit from work, and determine cause of stalling. DO NOT

CLICK TRIGGER OFF AND ON IN AN ATTEMPT TO START A STALLED DRILL — THIS CAN DAMAGE THE DRILL.

7.To minimize stalling or breaking through the material, reduce pressure on drill and ease the bit through the last fractional part of the hole.

8.Keep the motor running when pulling the bit back out of a drilled hole. This will help prevent jamming.

9.With variable speed drills there is no need to center punch the point to be drilled. Use a slow speed to start the hole and accelerate by squeezing the trigger harder when the hole is deep enough to drill without the bit skipping out.

BUBBLE

BUBBLE

LEVEL

	BUBBLE
	BUBBLE
FIG. 3A	LEVEL
	FIG. 3B

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Drilling in Metal

Use a cutting lubricant when drilling metals. The exceptions are cast iron and brass which should be drilled dry. The cutting lubricants that work best are sulfurized cutting oil or lard oil; bacon-grease will also serve the purpose.

Drilling in Wood

Holes in wood can be made with the same twist drills used for metal. These bits may overheat unless pulled out frequently to clear chips from the flutes. For larger holes, use power drill wood bits. Work that is apt to splinter should be backed up with a block of wood.

Drilling in Masonry

Use carbide tipped masonry bits at low speeds. Keep even force on the drill but not so much that you crack the brittle materials. A smooth, even flow of dust indicates the proper drilling rate.

Bubble Level

Your drill is equipped with a bubble level that assists you in drilling level holes.

For horizontal drilling, tilt the drill up or down as required so that the bubble floats in the center of the parallel lines drawn on the glass. When the bubble is centered between the lines, as shown in Figure 3A, the drill is level.

For vertical drilling, align the drill so that the bubble floats in the center of the bull’s-eye, as shown in Figure 3B.

To assure accuracy, first place a level on your work piece and position it so that it is level. Then, when the drill reads level, the two will be aligned. (Any bubble level can only indicate level to the earth’s surface.)

NOTE: The level is filled with mineral oil that may cause minor skin irritation when contacted. If the level breaks and this fluid gets on

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