Black & Decker 724156-01 - Manual (Page 2)

EXTENSION CORDn Phase Units
When using the tool at a considerable distance from power
source, a 3-connector, grounding-type extension cord of ade­
quate size must be used for safety and to prevent loss to
power and over-heating. Use the table below to determine the
minimum wire size required.
Use only three wire extension cords which have three-prong
grounding-type plugs and three-pole receptacles which ac­
cept the tool’s plug. Replace or repair damaged or worn cord
immediately.
Ampere rating Oto 2.10to 3.5to 5.10to 7.10tO 12.1 to
(on nameplate) 2.0 3.4 5.0 7.0 12.0 16.0
Ext. Cable length W ire S ize (A.W .G.)
25 ft. 18 18 18 18 16 14
50 ft. 16 16 16 16 14 12
75ft. 16 16 16 14 12 10
100 ft. 16 16 14 12 10 .—
150ft, 14 14 12 12 — _
200 ft. 14 14 12 10 — —
ASSEMBLING 6" BENCH GRINDER
NO. 4305
RUBBER
Spark Shields should be attached to the tops of the wheel
guards with included Vz" long self-tapping screws. Keep
shields adjusted so that there is 1/16" clearance between
the shields and the grinding wheel or wire wheel brush.
The Wheel Guard Covers are installed with two screws and
lockwashers. Nuts to accommodate the screws are embedded
in the grinder housing.
Place the Plastic Eyeshield In the circular notches on either
side of the grinder housing. Attach rubber washer, small steel
flat washer and knob. The shield can be raised from its
normal position to accommodate unusually shaped pieces to
be worked on.
Use Notched Tool Rest with the grinding wheel on left side of
grinder. Use Unnotched Tool Rest with wire brush on right
side of grinder. The tool rests slide in and out to adjust for
wheel wear. They also swivel at right angles to the wheel for
convenience in angle grinding. The tool rest should be ad­
justed so that there is 1/16" clearance between it and the
grinding wheel or wire brush.
EYE SHIELDS & SPARK SHIELDS
Bench Grinders have Spark Shields which are mounted at the
front of the wheel guards (Figure 1). As the grinding wheel
wears down, the Shield should be kept adjusted so that the
clearance between the wheel and the Shield is approximately
1/16".
EYE SHIELDS & SPARK SHIELDS
continued
WHEEL GUARD SPARK SHIELD
To attach Eye Shield, use same
bolt that holds Spark Shield on
Bench Grinder Wheel Guard.
TOOL RESTS
Tool Rests are adjustable for wheel wear. Keep them ad­
justed so that a clearance of 1/16" is maintained between the
wheel and the tool rest, i his clearance Is very important as it
will prevent a piece of any consequence, which could break
off the item being ground, from jamming between the wheel
and the tool rest. Such jamming could fracture the wheel,
break the tool rest, or both.
L.
-4:__________
¡^CENTER
A I
Figure 3A
BENCH MOUNTING
Bench Grinders should be solidly attached to the bench for
safer and more efficient operation.
6'^ (NO. 4305) BENCH GRINDER (Figure 3A):
To prevent movement of
the grinder when pressure
Is applied against a wheel,
attach grinder to bench
with two 1/4" bolts. Drill
holes through bench at
locations shown in Figure
3A. Insert bolt heads into
slots “A” in bottom of
grinder and slide bolts
outward.
Feed bolts
through holes in bench
and fasten each bolt with
two nuts to keep bolts
from loosening during operation. Tighten bolts only enough
to compress rubber feet about 1/16" to keep feet effective in
absorbing vibration.
6" and 7" (NOS. 4310, 4315) BENCH GRINDERS (Figure 3B):
Two 1/4"-20 or 1/4"-28 square head bolts, two 1 /4" nuts,
two 1/4" flat washers, and two 1 /4" lockwashers are required
(not supplied). Bolt length should be approximately the thick­
ness of the bench top plus 1 Inch.
Figure 3B shows the location of the required mounting holes
in the bench.
DISTANCE “A” — To suit user’s application.
DISTANCE “B” — Approximately 4" for 1/4" set-back from
front edge of bench.
Place bolt heads in slots through base of Bench Grinder and
lower bolts through holes in bench. Attach washers and nuts
and tighten securely. (Continued next column)
BENCH MOUNTING continued
FRONT OF BENCH
8" BENCH GRINDERS (Figure 4):
Two 1/4"-28 bolts, two 1/4" flat washers, and two 1 /4" lock­
washers are required (not supplied). Bolt length should be
approximately the thickness of the bench top plus 1 inch.
Figure 4 shows the location of the required mounting holes
in the bench.
DISTANCE “A” — 1 0 suit user’s application.
DISTANCE “B” — Approximately 4-1/2" for 1/4" set-back
from front edge of bench.
Place Bench Grinder on bench and insert bolts with washers
up from underneath bench top. Line up bolts with tapped
holes in bottom of Bench Grinder and tighten securely.
CHANGING WHEELS
With 6" & 7" Bench Grinders, UNPLUG POWER CORD AND
BE SURE THAT SWITCH REMAINS IN THE “OFF” POSITION.
With 8" Bench Grinders, which are permanently wired to the
power source, disconnect the power source at the disconnect
switch, fuse panel or circuit breaker panel.
Figure 5 ^ clamp washers
-CLAMP WASHERS-
6" & 7" GRINDERS
WHEEL
(5/8" ARBOR)
8" GRINDERS
NOTE: Each grinding wheel purchased should be equipped
with a blotter fastened to each side of the wheel. Blotters
must always be used between the wheel and the inner and
outer clamp washers.
CHANGING WHEELS
Grinding Wheels
1. Remove wheel guard covers.
2. Remove clamp nut by turning it in the same direction as
the wheel turns. (Figure 5).
3. Remove wheel and both clamp washers. Inspect washers.
If they are burred or not perfectly flat, repair or replace
them.
4. When installing the new grinding wheel, always use blotters
between the wheel and each washer. Contact surfaces of
wheels, blotters and washers must be clean and flat.
5. Always use the exact type of washers that are supplied
with your tool. Never substitute flat or odd sized washers.
6. Only tighten arbor nut sufficiently to drive the wheel wih-
out slippage.
7. Be sure to replace guard end covers, and adjust spark
shields, tool rests and eye shields before operating tool.
(Figs.
1 & 2).
8. After installing replacement wheel, put on safety goggles
and stand to the side of the grinder, turn switch “ON” and
allow wheel to revolve freely for one minute before be­
ginning to grind.
Wire Wheel Brushes
1. FOLLOW STEPS 1, 2 & 3 under “Grinding Wheels” above.
Use the two arbor adaptors included with the brush, and
the two clamp washers on the Bench Grinder.
2. Protect your hands with gloves or a rag when handling
Wire Wheels.
3. FOLLOW STEPS 5, 6 & 7 under “Grinding Wheels”,
Cotton Buffing Wheels
1. FOLLOW STEPS 1, 2 & 3 under “Grinding Wheels” above,
install wheel with a clamp washer on each side of wheel
and tighten nut sufficiently to keep wheel from slipping.
Attach guard end covers.
2. Put on safety goggles before starting any buffing opera­
tions.
GRINDING INSTRUCTIONS
Put on safety goggles and hold the work firmly. Rest the work
on the tool rest and feed it slowly into the wheel at the de­
sired grinding angle. Treat the wheel with respect . . . do not
jam the work into the wheel or use unnecessary pressure.
Grind only on the face of the wheel, unless you have a special
wheel specifically made to permit grinding on the side of the
wheel.
When grinding tempered tools such as chisels and knives,
keep a container of cutting fluid or water nearby. During the
grinding operation, frequently dip the top part of the work Into
the liquid to avoid overheating and losing the temper. In fact,
all metals can be ground more efficiently if they are
“quenched” in this manner to avoid overheating which can
soften or “burn” the metal.
WIRE BRUSHING INSTRUCTIONS
Wire Brushes are used to remove rust, scale and old paint.
Do not jam work into wheel. Hold work firmly while brushing.
Always wear safety goggles for protection against particles
thrown from brush and work piece.
BUFFING INSTRUCTIONS
Use Cotton Buffing Wheels, normally with stick buffing com­
pound applied to the face of the wheel (usually about 5/8"
wide). Wear safety goggles for protection against particles of
compound thrown off by the wheel. Do not jam work into
wheel. Hold work firmly.
LUBRICATION
No periodic lubrication of the Bench Grinder is required.