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APPLICATIONS
Drilling in Wood, Composition Materials and Plastic
When drilling in wood, composition materials and plastic, start the drill
slowly, gradually increasing speed as you drill. When using twist drill
bits, pull the bit out of the hole frequently to clear chips from the bit flutes.
Use low speeds for plastics with a low melting point.
Drilling in Metal
When drilling in metal, use high speed steel twist drills or hole saws. Use
slow speeds for hard metals and high speeds for softer metals. Lubri-
cate drill bits with cutting oil when drilling in iron or steel. Use a coolant
when drilling in nonferrous metals such as copper, brass or aluminum.
Back the material to prevent binding and distortion on breakthrough.
Drilling in Masonry
When drilling masonry, use high speed carbide-tipped bits at low speeds.
Drilling soft masonry materials such as cinder block requires little pres-
sure. Hard materials like concrete require more pressure. A smooth,
even flow of dust indicates the proper drilling rate. Do not let the bit spin
in the hole without cutting, since this will damage the bit. Do not use
water to settle dust or to cool bit. This will damage the carbide and create
a shock hazard.
WARNING!
To reduce the risk of injury, always unplug tool before
attaching or removing accessories. Use only specifically
recommended accessories. Others may be hazardous.
