Black and Decker DR670 Manual De Instrucciones página 8

• For continuous operation, press the lock-on button (2) and release the variable speed
switch. This option is available only at full speed in both forward and reverse direction.
• To switch the tool off, release the variable speed switch. To switch the tool off when in
continuous operation, press the variable speed switch once more and release it.
The drill should only be locked ON when it is held stationary in a drill
press stand or other means; NOT BY HAND! Never unplug the tool with the locking
WARNING:
feature engaged. To do so will cause the tool to start immediately the next time it is
plugged in.
• Always unplug the drill when attaching or removing accessories. When attaching
Drilling
accessories in the drill chuck, it is important to securely tighten the chuck using all three
holes to prevent slippage. When using a keyless chuck, hand tighten firmly.
• Use sharp drill bits only.
• Support and secure work properly, as instructed in the safety instructions.
• Use appropriate and required safety equipment, as instructed in the safety instructions.
• Secure and maintain work area, as instructed in the safety instructions.
• Plug in drill. Make sure switch turns drill on and off.
• Run the drill very slowly, using light pressure, until the hole is started enough to keep the
drill bit from slipping out of it.
• Apply pressure in a straight line with the bit. Use enough pressure to keep the bit biting
but not so much as to stall the motor or deflect the bit.
• Hold the drill firmly with both hands to control its twisting action (figure A).
• Use side handle if drill is equipped with one.
• DO NOT CLICK THE TRIGGER OF A STALLED DRILL OFF AND ON IN AN ATTEMPT
TO START IT. DAMAGE TO THE DRILL CAN RESULT.
• Minimize stalling on breakthrough by reducing pressure and slowly drilling through the
last part of the hole.
• Keep the motor running while pulling the bit out of a drilled hole. This will help reduce jamming.
Holes in wood can be made with the same twist drill bits used for metal or with spade bits.
Drilling In Wood
These bits should be sharp and should be pulled out frequently when drilling to clear
chips from the flutes.
Use a cutting lubricant when drilling metals. The exceptions are cast iron and brass which
Drilling In Metal
should be drilled dry. The cutting lubricants that work best are sulfurized cutting oil or lard oil.
Drilling in Masonry (Shift drill into hammer mode)
Use carbide tipped masonry bits. Refer to Drilling section. Keep even force on the drill but
not so much that you crack the brittle material. A smooth, even flow of dust indicates the
proper drilling rate.
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