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-12- G8220 Wet/Dry Bench Grinder
Long straight types of blades such as jointer or
planer knives can also be sharpened on this
machine as well. Position the blades as shown in
Figure 7, with the miter gauge set at a zero
angle. For this type of operation, it is necessary
to sweep the blade edge across the wheel. The
sliding table retained in the groove of the tool
rest holder allows for this sweeping action. Allow
the blade edge to push the circular foam materi-
al down, this is perfectly acceptable and helps to
insure the water does not spin off the wheel.
Maintain a constant and steady pressure
throughout the entire range of the sweeping
action to ensure that the blade is evenly ground
all the way to its edges. Be sure to avoid over-
heating the blades during grinding.
Figure 7. Grinding long knives.
Figure 8. Grinding on dry wheel.
Adjust the angle of the Tool Rest by loosening
the two lock knobs. The angle can also be affect-
ed by raising or lowering the entire Tool Rest
assembly by loosening the hex bolt at the front of
the wheel guard. Once you have achieved the
angle necessary for the item to be ground, make
certain all the adjustment knobs and bolts are
tightened so the rest will not move during grind-
ing.
Position the Eye Shield so it will cover the grind-
ing area. The Eye Shield can be moved up and
down, as well as back and forth, to get it in a
position where sparks will not fly up in the oper-
ator’s face. Tighten the adjusting bolt.
For dry grinding, it may be helpful to have a tray
of water handy for quenching the piece when it
builds up heat in the grinding process. Similar to
the wet wheel process, quenching keeps the
ground item from losing its temper by keeping
the temperature down.
Turn the grinder on and allow the wheel to come
up to full speed. Place the item to be ground
firmly on the Tool Rest and introduce it slowly
into the wheel. Grinding should be done lightly
and for short duration to avoid damage to the
tool you’re working with.
Use extreme caution when working near
rotating grinding wheels. Accidental con-
tact with the wheel can cause cuts and
abrasions. The spinning wheels can also
propel items which are not firmly support-
ed. Failure to exercise care while working
near grinding wheels could result in severe
injury.
Dry Wheel Grinding
Sweep back
and forth