Variable speed drills will double as a power screw driver by using screwdriver bits. 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.
In drilling wood, you will drill a cleaner hole if you ease up on the pressure just before the bit breaks
through the wood. Then complete the hole from the backside.
In drilling metal, there are two rules for drilling hard materials. First, the harder the material, the greater
the pressure. Second, the harder the material, the slower the speed. Here are a Couple of tips for drilling
in metal. Lubricate the tip of the bit occasionally with oil except when drilling in soft metal such as
aluminum, copper, or cast iron. If the hole to be drilled is large, drill a smaller hole first, and then
enlarge to the required size. It's often faster in the long run. Maintain enough pressure to assure that the
bit does not spin in the hole. This will dull the bit and shorten its life.
In drilling masonry, use the hammer function with masonry bits designed for hammering. Be careful in
drilling softer materials such as brick. The drill will penetrate very quickly.
MAINTENANCE
The power cord and drill should be wiped occasionally to prevent deterioration from oil and grease.
Clean the air vent holes with compressed air. If compressed air is not available, clean vent holes with a
brush. This will keep the motor cool and lengthen its life. When using compressed air, wear safety
goggles.
CAUTION Certain cleaning agents and solvents can damage plastic parts. Some of these are, gasoline,
carbon tetrachloride, chlorinated cleaning solvents, ammonia and household cleaners containing
ammonia. Avoiding use of these and other types of cleaning agents will minimize the probability of
damage.
WARNING All repairs, electrical or mechanical should be done only by trained repairmen. Use only
parts authorized by the manufacturer as replacement parts.
SPECIFICATIONS
1/2 inch Hammer Drill
Voltage: l20Volts 60Hz
Current Draw: 5Amps
No Load Speed: 0 to 2800RPM
HAMMER DRILL 1/2" EXPLOSION DRAWING
Summary of Contents for SP-PT237
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