Craftsman 351.211930 Manual De Usuario página 6

SPECIFICATIONS
The grinder is assembled with motor and wiring installed as
an integral part of the tool,.
Horsepower (Continuous Duty) .............................
Voltage ............................................................. 120
Amperes
..................................................... 5 O
Hertz ............................................. 60
Phase ................................................... Single
RPM .............................................. 2000-3300; 3450
Rotation (viewed from left side) ................. Clockwise
Wheel diameter ................................................... 8"
Wheel bore ............................................ s#,
Wheel face ................................................. 1"
Stand height
..............................................
31"
Gross weight ....................................... 61 lbs
ALUMINUM OXIDE VITRIFIED WHEELS
Grit .................................. #36 Coarse and _t60 Medium
ONIOFF SWITCH
,J To turn the grinder ON, pull the switch to the up position..
• To turn the grinder OFF, push the switch to the down posi-
tion
NOTE: The grinder can be locked from unauthorized use by
locking the switch_.
To lock the switch:
• Turn the switch to OFF position and disconnect grin der
from power source
• Pu!] the key out, The switch cannot be turned on with the
key removed,,
NOTE: Should the key be removed from the switch at the ON
position, the switch can be turned off but cannot be turned on
again,,
• To replace key, slide key into the slot on switch until it
snaps
VARIABLE SPEED SWITCH
° To operate grinder at full speed (3450 RPM), turn knob
(Key No., 59) completely counterclockwise.
° To operate grinder at a slower speed turn knob clockwise,
The speed is infinitely variable from 2000 to 3300 RPM
GRINDING
• Sharpening and grinding operation can be done on the
right side of the grinder using grinding wheel
• Cleaning of metal surfaces can be done on the left side of
the grinder using wire wheel
• Keep a steady, moderate pressure on the work piece and
keep it moving at an even pace for smooth gdnding.r
• Pressing too hard overheats the motor and prematurely
wears down the grinding wheels.
• Avoid excessive pressure when using wire wheel,,
Excessive pressure causes over-bending of the wires and
heat build-up resulting in wire breakage, dulling and
reduced wheel life
- Note the original beveled angle on the item to be sharp-
ened and try to maintain that angle, Sharpening a cutting
edge requires removing burrs from edge,
- Deburring edge is done best by using the grinder to pull
burr from edge across the bevel angle,
- The grinding wheel should rotate into object being sharp-
ened.
• Use slower wheel speed when sharpening tempered tools
Overheating wilt destroy the temper.
,, Dip work into a coolant regularly to prevent overheating
Overheating can weaken metals.
,, Do not grind on the sides of grinding wheels unless they
are specifically designed for that purpose.,
• When starting the tool, let it run for one minute, Never start
the toot with a person in line with the wheel This includes
the operator.
WARNING:
In normal wire wheel operations, the material
being removed, such as burrs, scale, dirt, weld slag or other
residue, wilt fly off the wheel with considerable force along
with wire filaments which break off due to fatigue,
,, As wheels wear, toot rests should be positioned closer to
the face of the wheels.,
- The gap between the wheel and the tool rest should not be
greater than 't,," When the wheels are worn to the extent
that the V,_,"maximum gap cannot be maintained, the
wheels should be replaced.,
,, Replacement wheels must have a minimum rated speed of
3500 RPM
• Maximum wheel diameter is 8".
• To loosen the nuts holding the wheels, disconnect power
and push a wood wedge between the toot rest and the
wheel to keep the shaft from turning The threads on the
right side of the grinder (facing unit) are right hand; the
threads on the left side are left hand Tighten nuts securely
before operating the grinder
. For grinding efficiency, wheels should be dressed periodi-
cally, especially if they become clogged from gdnding soft
metals,
• Use grinding wheel dresser - 25282 to restore wheels to
original shape, (See recommended accessories, page I1.)
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