5
Drilling in Metals
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 sulphurized cutting oil or lard oil; bacon grease will also serve the pur-
pose.
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.
Lubrication
All ball and sleeve bearings used are factory lubricated to last the life of the
bearings. All needle bearings used received their lubrication from the grease
in the gear case. Clean and relubricate gear case yearly or whenever servic-
ing requires the gear case to be removed. Use type and quantity of grease
shown on Parts Bulletin packed with your tool.
The gear case is removed by removing the three screws from the front of the
tool. If the chuck is too large to permit removal of the two top screws, see
instructions for chuck removal.
Motor Brushes
Your drill uses the B&D CHECKPOINT™ brush system. The tool will stop
when the brushes wear out. This prevents damage to the motor.
IMPORTANT!
To assure product safety and reliability, particularly for double Insulated
tools, repairs, maintenance and adjustment (excluding maintenance
described in this manual) should be performed by B&D service centers or
authorized service centers, using identical B&D replacement parts.
MAINTENANCE
154569/1166-220 5/17/02 1:39 PM Page 5
