BM 1609929A20 3/03 3/12/03 10:35 AM Page 10
Grinding Operations
ELECTING GRINDING WHEELSGRINDING TIPS
Before using a grinding wheel, be certainEfficient grinding is achieved by controlling
that its maximum safe operating speed isthe pressure and keeping the angle between
not exceeded by the nameplate speed of thewheel and workpiece at 10! to 15!. If the
grinder. Do not exceed the recommendedwheel is flat, the tool is difficult to control. If
wheel diameter.the angle is too steep, the pressure is
concentrated on a small area causing
DISC GRINDING WHEELSburning to the work surface.
Grinding wheels should be carefully selected
in order to use the grinder most efficiently.Excessive or sudden
Wheels vary in type of abrasive, bond,pressure on the wheel will!WARNING
hardness, grit size and structure. The correctslow grinding action and put dangerous
type of wheel to use is determined by thestresses on the wheel.
job. Use disc grinding wheels for fastWhen grinding with a new wheel be certain
grinding of structural steel, heavy weldto grind while pulling tool backwards until
beads, steel casting, stainless steel and
other ferrous metals.wheel becomes rounded on its edge. New
wheels have sharp corners which tend to
Obite� or cut into workpiece when pushing
forward.
Wire Brush Operations
Wire brushes are intended to Oclean�Avoid bouncing and snag-!WARNING
structural steel, castings, sheet metal, stoneging the wire brush, espe-
and concrete. They are used to remove rust,cially when working corners, sharp edges
scale and paint.etc. This can cause loss of control and
kickback.
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ACEC
BOSCH
