Motor Brushes; Cutting Tips - DeWalt DW893 Instruction Manual

384447/DW893 5/2/02 1:25 PM
Symptoms of blade wear include: difficulty in cutting
material, ragged cut edge, heavier burr, and increased
vibration while cutting.
Your shear is equipped with two identical blades with four
cutting edges on each blade. The moving blade wears faster
than the stationary blade. However, it is advisable to rotate
both blades to fresh edges at the same time.
TO ROTATE THE BLADES, remove the two blade clamp
screws. Rotate each blade to a fresh edge. Replace screws
exactly as they were removed. Note that the stationary blade
clamp screw is longer and will cause damage to the tool if it
is used to secure the moving blade. (See Figure 2)
Stationary blade must be snug against the gap adjusting
screw. Check and adjust blade gap if necessary. (See
following section on adjusting the blade gap.) Tighten all
screws.

Cutting Tips

• Proper blade gap is important.
• Dull blades increase user pressure on tool to cut and
could result in damage to tool.
• Always start tool before engaging material.
• Keep metal surface dry. Otherwise, shear will tend to
rebound (slide back) at each cutting stroke.
• Cut material so that scrap is to the right. This cutting
direction will move curl down and out of the way.
• When cutting a radius, turn the shear counterclockwise for
easier maneuvering.
• Best cutting (least effort) can be achieved when back of
tool is lowered 5˚ - 10˚.
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Lubrication
D Walt tools are properly lubricated at the factory and are
E
ready for use. Tools should be relubricated regularly every
sixty days to six months, depending on usage. (Tools used
constantly on production or heavy-duty jobs and tools
exposed to heat may require more frequent lubrication.) This
lubrication should only be attempted by trained power tool
repair persons such as those at D
centers or in other qualified service organizations.

Motor Brushes

Brush replacement should be performed by D
authorized service centers or other qualified service
organizations.
Figure 2
CAM SHAFT
HEAD
MOVING
BLADE
STATIONARY
BLADE
BLADE
CLAMP
SCREW
GAP
SCREW
ADJUSTING
SCREW
BLADE
STATIONARY
GAP
BLADE CLAMP
SCREW
Walt authorized service
E
Walt
E
MOVING
BLADE
STATIONARY
BLADE
BLADE
GAP
CLAMP
ADJUSTING
SCREW
BLADE
STATIONARY
GAP
BLADE CLAMP
SCREW