SM 2610912724 3/03 3/6/03 2:00 PM Page 8
DRILL LEVEL
Your tool is equipped with drill level located on top of the housing that will allow you to accurately enter the workpiece in a horizontal position (Fig. 1).
USING THE LEVEL: Place drill bit where hole is to be drilled, position drill so the bubble in the level is centered between the lines, then start drilling the hole, once the bit has entered the workpiece check from time to time to be sure the bit is maintaining the horizontal position.
Operating Tips
You will extend the life of your bits and do neater work if you always put the bit in contact with the work before pulling the trigger. During the operation, hold the tool firmly and exert light, steady pressure. Too much pressure at low speed will stall the tool. Too little pressure will keep the bit from cutting and cause excess friction by sliding over the surface. This can be damaging to both tool and bit.
DRILLING WITH VARIABLE SPEED
The trigger controlled variable speed feature will eliminate the need for center punches in hard materials. The variable speed trigger
allows you to slowly increase RPM. By using a slow starting speed, you are able to keep the bit from “wandering”. You can increase the speed as the bit “bites” into the work by squeezing the trigger.
DRIVING WITH VARIABLE SPEED
Variable speed drills will double as a power screwdriver by using a screwdriver bit in the drill mode. The technique is to start slowly, increasing the speed as the screw runs down. Set the screw snugly by slowing to a stop. Prior to driving screws, pilot and clearance holes should be drilled.
FASTENING WITH SCREWS
This procedure shown in (Fig. 4) will enable you to fasten materials together with your Drill/Screwdriver without stripping, splitting or separating the material.
FASTENING |
|
|
|
| 2. Drill same diameter | ||
WITH SCREWS |
| as screw shank |
|
|
|
|
|
1. Drill 2/3 diameter |
| 3. Countersink | |
and 2/3 of screw |
| same diameter | |
length for soft |
| as screw head | |
materials, full |
|
|
|
length for hard |
|
|
|
materials |
|
|
|
|
| Adjustable | |
|
| Screw | |
Screw |
| Drill | |
|
|
| |
| Apply a slight | ||
| even pressure | ||
| when driving | ||
| screws | ||
FIG. 4
First, clamp the pieces together and drill the first hole 2/3 the diameter of the screw. If the material is soft, drill only 2/3 the proper length. If it is hard, drill the entire length.
Second, unclamp the pieces and drill the second hole the same diameter as the screw shank in the first or top piece of wood.
Third, if flat head screw is used, countersink the hole to make the screw flush with the surface. Then, simply apply even pressure when driving the screw. The screw shank clearance hole in the first piece allows the screw head to pull the pieces tightly together.
The adjustable screw drill accessory will do all of these operations quickly and easily. Screw drills are available for screw sizes No. 6, 8, 10 and 12.
DRILL BITS
Always inspect drill bits for excessive wear. Use only bits that are sharp and in good condition.
TWIST BITS: Available with straight and reduced shanks for wood and light duty metal drilling. High speed bits cut faster and last longer on hard materials.
CARBIDE TIPPED BITS: Used for drilling stone, concrete, plaster, cement and other unusually hard nonmetals. Use continuous
