BOSCH 1347A, 1348AE User guide

1347A
0 601 347 0 . .

1348AE
0 601 348 7 . .

Before use - Read this instruction manual.
Lisez attentivement la présente notice avant l'emploi.
Lea estas instrucciones de manejo antes de la utilización del aparato.

BM 3609929584 7/01 7/26/01, 12:40 PM1

14

23

1

4

5

6

10
11

13

12

BM 3609929584 7/01 7/26/01, 12:40 PM2

7

8

9

2

Product Data - Angle Grinders

Model number 1347A 1348AE
Identification number 0 601 347 0 . . 0 601 348 7 . .
Max. wheel diameter 4 1/2" 5"
Spindle thread 5/8"-11 5/8"-11
Max. wire wheel 4" Dia. 4" Dia.
Max. wire cup brush 3" Dia. 3" Dia.
Max. sanding disc 5" Dia. 5" Dia.
Max. cut off wheel 4 1/2" Dia. 4 1/2" Dia.
Max. diamond wheel 4" Dia. 4" Dia.

Accessory Listing

Wheel Guard *
Grinding Wheel *
Side Handle *
Lock Nut *
Backing Flange *
Lock Nut Wrench *

( * = standard equipment)

Angle Grinder Components

1. Side Handle 8. Grinding Wheel

2. Air Vent 9. Lock Nut

3. Spindle Lock 10. Backing Pad

4. Spindle 11. Sanding Disc

5. Wheel Guard 12. Pad Lock Nut

6. Collar Screw 13. Wire Cup Brush

7. Backing Flange 14. ON/OFF Switch

WARNING! “READ ALL INSTRUCTIONS”.
Failure to follow the SAFETY RULES identi­fied by the BULLET (•) symbols listed BELOW
and other safety precautions, may result in seri­ous personal injury. Keep these operating
instructions with this product.

GENERAL SAFETY RULES

for all Power Tools

Work Area

• KEEP WORK AREAS CLEAN. Cluttered
areas and benches invite accidents.

• AVOID DANGEROUS ENVIRONMENT.

BM 3609929584 7/01 7/26/01, 12:40 PM3

Don’t use power tools in damp or wet locations.
Do not expose power tools to rain. Keep work
area well lit.

• AVOID GASEOUS AREAS. Do not operate
portable electric tools in explosive atmospheres
in presence of flammable liquids or gases. Mo­tors in these tools normally spark, and the sparks
might ignite fumes.

• KEEP CHILDREN AWAY. Do not let visi­tors contact tool or extension cord. All visitors
should be kept away from work areas.

Personal Safety

• GUARD AGAINST ELECTRIC SHOCK.
Prevent body contact with grounded surfaces
such as pipes, radiators, ranges and refrigerator

3

enclosures. Rubber gloves and non-skid foot­wear are recommended when working outdoors,
where damp or wet ground may be encountered.
A Ground Fault Circuit Interrupter protected
power line must be used for these conditions.

• DRESS PROPERLY. Do not wear loose
clothing or jewelry. They can be caught in mov­ing parts. Wear protective hair covering to
contain long hair.

• USE SAFETY EQUIPMENT. WEAR
SAFETY GOGGLES or glasses with side shields.
Wear hearing protection during extended use of
power tools and dust mask for dusty operations.

• STAY ALERT. USE COMMON SENSE.
Watch what you are doing. Do not operate tool
when you are tired or under influence of drugs.

•

REMOVE ADJUSTING KEYS AND
WRENCHES.
keys and adjusting wrenches are removed from
tool before turning it on.

• AVOID ACCIDENTAL STARTING. Don’t
carry plugged in tool with finger on switch. Be
sure the switch is OFF before being plugged in.

• DON’T OVERREACH. Keep proper footing
and balance at all times.

• BEFORE CONNECTING THE TOOL to a
power supply (receptacle, outlet, etc.) be sure
the voltage supplied is the same as that specified
on the tool’s nameplate. A power supply with
voltage greater than that specified for the tool
can result in serious injury to the user - as well as
damage to the tool. If in doubt, DO NOT PLUG
IN THE TOOL. Using a power supply with
voltage less than the nameplate rating is harmful
to the motor.
“Volts AC” designated tools are for Alternating
Current 50-60 Hz only. “Volts DC” designated
tools are for Direct Current. Do not use AC
designated tools with DC power supply. Do not
use electronic speed controlled tools with DC

power supply.

Form habit of checking to see that

Tool Use and Care

• DON’T FORCE TOOL. It will do the job
better and safer at the rate for which it was
designed.

• USE RIGHT TOOL. Don’t force small tool
or attachment to do the job of a heavy-duty tool.
Don’t use tool for purpose not intended - for
example; don’t use a circular saw for cutting tree
limbs or logs.

• SECURE WORK. Use clamps or a vise to
hold work. It’s safer than using your hand and it
frees both hands to operate the tool.

• DON’T ABUSE CORD. Never carry tool by
cord or yank it to disconnect from receptacle.

Keep cord from heat, oil, and sharp edges. Al­ways keep cord away from the spinning blade,
bits or any other moving part while the tool is in
use.

• OUTDOOR USE EXTENSION CORDS.
When tool is used outdoors, use only extension
cords suitable for use outdoors and marked with
suffix W-A (for UL), or W (for CSA). Refer to
section “Extension Cords”, for proper cord use.

• DISCONNECT TOOLS. When not in use,
before servicing, or when changing blades, bits,
cutters, etc.

• STORE IDLE TOOLS. When not in use,
tools should be stored in dry, high or locked up
place - out of the reach of children.

• DO NOT ALTER OR MISUSE TOOL. These
tools are precision built. Any alterations or
modifications not specified is misuse and may
result in a dangerous condition.

• THE USE OF ANY ACCESSORIES not
specified in this manual may create a hazard.

• MAINTAIN TOOLS WITH CARE. Keep
tools sharp and clean for better and safer perfor­mance. Follow instructions for lubricating and
changing accessories. Inspect tool cords peri­odically and if damaged, have repaired by autho­rized service facility. Inspect extension cords
periodically and replace if damaged. Keep
handles dry, clean and free from oil and grease.

• CHECK DAMAGED PARTS. Before fur­ther use of the tool, a guard or other part that is
damaged should be carefully checked to deter­mine that it will operate properly and perform its
intended function. Check for alignment of mov­ing parts, binding of moving parts, breakage of
parts, mounting, and any other conditions that
may affect its operation. A guard or other part
that is damaged should be promptly and properly
repaired or replaced. Have defective switches
replaced. Do not use tool if switch does not turn
it on or off.

• ALL REPAIRS, ELECTRICAL OR ME­CHANICAL, should be attempted only by trained
repairmen. Contact the nearest Bosch Factory
Service Center, or Bosch Authorized Service
Center or other competent repair center. Use
only Bosch replacement parts, any other may
create a hazard.

Safety Rules for Grinders

• When using grinding wheel attachments, the
guard must always be attached to the tool and
positioned for maximum safety, so the least
amount of wheel is exposed from the side the
tool is being operated.

4

BM 3609929584 7/01 7/26/01, 12:40 PM4

• Before using a grinder or installing a new
wheel, inspect the grinding wheel for chips and
cracks. Remove bad wheels immediately. Run
the tool at no load for one minute, holding the
tool in the direction away from people. Wheels
with flaws will normally break apart during this
time.

• Carefully handle both the tool and individual
grinding wheels to avoid chipping or cracking.
Inspect grinding wheel before using. Do not use
a grinding wheel that is cracked. If tool is
dropped while grinding, install a new wheel. Do
not use a wheel that may be damaged.

• Grinding wheels or any other accessory must
have a maximum safe operating speed greater
than the “no load RPM” marked on the tool’s
nameplate.

• Do not use grinding wheel that is larger than
the maximum recommended size for your tool,
or worn down damaged wheels from larger grind­ers.

• Do not use depressed hub grinding wheels for
cut-off operations.

• Do not use this tool with “Woodcarving”
blade, such blades create frequent kick-back and
loss of control.

• Proper apparel while using a grinder includes:
face shield or at least safety goggles, dust mask,
leather gloves and shop apron capable of stop­ping small wheel or work piece fragments.

• Keep cord away from the grinding wheels or
any other sanding accessory.

• Avoid bouncing and snagging the wheel, es­pecially when working corners, sharp edges etc.
This can cause loss of control and kick-back.

• Clean the tool’s air vents by compressed air or
excessive accumulation of powdered metal in­side the motor housing may cause electrical
failures.

• Do not grind or sand near flammable materi­als, as sparks from the wheel could ignite these
materials.

• The grinding wheel guard cannot be used for
most sanding operations or for wire brushing.
When grinding is resumed, wheel guard must be
reinstalled on the tool.

• When sanding, do not use oversized sanding
disc. Larger sanding disc will extend beyond the
sanding pad causing snagging, tearing of the disc
or kick-back. Extra paper extending beyond the
sanding pad can also cause serious lacerations.

• When sanding chemically pressure treated
lumber, paint that may be lead based, or any

other materials that may contain carcinogens,
use special precautions. A suitable breathing
respirator must be worn by all personnel entering
the work area. Work area should be sealed by
plastic sheeting and persons not protected should
be kept out until work area is thoroughly cleaned.

WARNING! Some dust created by power
sanding, sawing, grinding, drilling, and other
construction activities contains chemicals
known to cause
cancer, birth defects or other reproductive harm.
Some examples of these
chemicals are:

• Lead from lead-based paints,

• Crystalline silica from bricks and cement and

other masonry products, and

• Arsenic and chromium from chemically treated
lumber.
Your risk from these exposures varies, depend­ing on how often you do this type of work. To
reduce your exposure to these chemicals: work
in a well ventilated area, and work with

ap­proved safety equipment, such as those dust
masks that are specially designed to filter out
microscopic particles.

Double Insulated Tools

• Double Insulation is a design concept
used in electric power tools which eliminates
the need for the three wire grounded power cord
and grounded power supply system. It is a
recognized and approved system by
Underwriter’s Laboratories, CSA and Federal
OSHA authorities.

IMPORTANT: Servicing of a tool with

double insulation requires care and knowledge
of the system and should be performed only by
a qualified service technician. WHEN SER­VICE IS REQUIRED USE ONLY IDENTI­CAL REPLACEMENT PARTS.

POLARIZED PLUGS: If your tool is equipped
with a polarized plug (one blade is wider than
the other), this plug will fit in a polarized outlet
only one way. If the plug does not fit fully in the
outlet, reverse the plug. If it still does not fit,
contact a qualified electrician to install the
proper outlet. To reduce the risk of electric
shock do not change the plug in any way.

BM 3609929584 7/01 7/26/01, 12:40 PM5

5

Extension Cords

• Replace damaged cords immediately. Use of
damaged cords can shock, burn or electrocute.

• If an extension cord is necessary, a cord with
adequate size conductors should be used to
prevent excessive voltage drop, loss of power
or overheating. The table below shows the
correct size to use, depending on cord length
and amperage rating on the tool’s nameplate. If
in doubt, use the next heavier gauge. Always
use U.L. and CSA listed extension cords.

Ampere Rating (shown on nameplate)

0- 2.1- 3.5- 5.1- 7.1- 12.1-

2.0 3.4 5.0 7.0 12.0 16.0

25' 18 18 18 18 16 14
50' 18 18 16 16 14 12
75' 18 18 16 14 12 10

100' 18 16 14 12 10

Cord Length

150' 16 14 12 12 Wire Gauge

Note: The smaller the gauge number, the larger

the wire is in the cord.

"SAVE THESE INSTRUCTIONS"

Operating the Tool

Slide "ON-OFF" switch with Lock

The tool is switched "ON" by the slide switch
located at the side of the motor housing. The
switch can be locked in the "ON" position, a
convienience for long grinding operations.
TO TURN THE TOOL "ON" without locking
it, slide the switch forward by appling pressure
ONLY at the REAR portion of the button.
When pressure is released the switch button
will snap to "OFF" position.
TO LOCK THE SWITCH "ON", slide the
switch button forward and press "IN" the
FRONT portion.
TO UNLOCK THE SWITCH, simply press
and release the REAR portion of the button.
Switch is spring loaded and will snap back
automatically.

WARNING ! Hold the tool with both hands

while starting the tool, since torque from the
motor can cause the tool to twist.

“Soft Start” Feature

(1348AE)

The grinder is equipped with the “soft start”
feature which gradually increases the starting
speed and torque, reducing the stress that occurs
from a high torque start.

Start the tool before applying to work and let
the tool come to full speed before contacting
the workpiece. Lift the tool from the work
before releasing the switch. DO NOT turn the
switch “ON” and “OFF ”while the tool is under
load; this will greatly decrease the switch life.

Side Handle

The side handle 1 used to guide and balance the
tool can be threaded into the front housing on
either side of the tool, depending on personal
preference and comfort. Use the side handle
for safe control and ease of operation.

Wheel Guard

Always attach wheel guard 5 for grinding
operation. Attach with collar screw 6.

Lock Nut and Backing Flange

Your tool is equipped with a threaded spindle 4
for mounting accessories. Always use the
supplied lock nut 9 and backing flange 7 that
has same thread size as spindle.

Spindle Lock

This tool is equipped with a spindle lock 3 to aid
in mounting accessories to spindle.

WARNING! Do not depress spindle lock

while operating tool.

GRINDING OPERATION

Wheel Guard Installation

WARNING! Wheel guard 5 must be attached

when using disc grinding wheels. Always keep
wheel guard between you and your work while
grinding.
To attach the grinding guard DISCONNECT
tool from power source, place wheel guard
collar over neck of bearing plate, then secure
guard with the collar screw as shown on page 2.

BM 3609929584 7/01 7/26/01, 12:40 PM6

6

Attaching the Disc Grinding Wheel

Disconnect tool from power source. Be sure
that wheel guard is in place for grinding. Place
BACKING FLANGE 7 and GRINDING
WHEEL 8 on the spindle. Thread on the lock
nut 9 and securely tighten nut with lock nut
wrench,while holding the spindle lock in.

TO REMOVE: Reverse procedure.

Selecting Grinding Wheels

WARNING! Before using a grinding wheel,

be certain that its maximum safe operating
speed is not exceeded by the nameplate speed
of the grinder. Do not exceedthe recommended
wheel diameter.

Disc Grinding Wheels

Grinding wheels should be carefully selected in
order to use the grinder most efficiently. Wheels
vary in type of abrasive, bond, hardness, grit
size and structure. The correct type of wheel to
use is determined by the job.

Use disc grinding wheels for fast grinding of
structural steel, heavy weld beads, steel casting,
stainless steel and other ferrous metals.

Grinding Tips

Efficient grinding is achieved by controlling
the pressure and keeping the angle between
wheel and work piece at 10° to 15°. If the wheel
is flat, the tool is difficult to control. If the angle
is too steep the pressure is concentrated on a
small area causing burning to the work surface.

CAUTION! Excessive or sudden pressure

on the wheel will slow grinding action, overload
the motor, and put dangerous stresses on the
wheel.
When grinding with a new wheel be certain to
grind while pulling tool backwards until wheel
becomes rounded on its edge. New wheels
have sharp corners which tend to “bite” or cut
into workpiece when pushing forward.

SANDING OPERATIONS

Backing Pad

WARNING! Before attaching a backing pad

10 be sure its maximum safe operating speed is

not exceeded by the nameplate speed of the
tool.

WARNING! Wheel guard may not be used

for most sanding operations. Always reinstall
wheel guard when converting back to grinding
operations.

Backing Pad and Sanding

Disc Installation

Disconnect tool from power source. Set the
tool on its top side (spindle up). Place the
rubber backing pad 10 onto the spindle shaft 4.
Center the sanding disc 11 on top of the backing
pad. Insert the pad lock nut 12 through the disc
and thread onto the spindle as far as you can
with your fingers. Press in the spindle lock 3
and rotate the backing pad until the lock engages,
then tighten the pad lock nut securely with lock
nut wrench.

TO REMOVE THE SANDING DISC: Reverse
the above procedure.

Selecting Sanding Discs

Sanding discs are made of extremely hard and
sharp aluminum oxide grits, phenol-resin
bonded to a sturdy fiber backing for fast heavy­duty service and long life. The discs vary as to
size and spacing of the abrasive grits. OPEN
COAT (type H) - used for soft materials and on
paint or varnish. CLOSED COAT (type K) ­used for metal, hardwood, stone, marble, and
other materials where ground off particles are
fine.

Sanding discs range in grit from 16 (very coarse)
to 180 (very fine). To obtain best results, select
sanding discs carefully. Many jobs require the
use of several grit sizes and at times both “open
and closed coat” discs are required to get the
job done faster.

Operation: Refinishing painted wood or metal surfaces.

Remarks Type Grit

To remove paint and to smooth "open coat" Coarse
surface irregularities. 16-24-30

To smooth the rough sanding. "closed coat" Medium

To remove scratches left by "closed coat" Fine
previous discs. 100-120

To smooth surface for painting "closed coat" Very Fine
polishing, or waxing. 150-180

36-50-80

Sanding Tips

For best results, tilt the Disc Sander at a 10° to

7

BM 3609929584 7/01 7/26/01, 12:40 PM7

15° angle while sanding so that only about 1" of
the surface around the edge of the disc contacts
the work.

WARNING! If the disc (accessory) is held

flat or the back edge of the disc comes in contact
with the work, a violent thrust to the side may
result.

If sander is tilted too much, sanding action will
be too great and a rough cut surface or gouging
and snagging will result.

Guide the Disc Sander with crosswise strokes.
Be careful not to hold the sander in one spot too
long. Do not use a circular motion, as this
makes swirl marks. Test before use on scrap
stock.

Do not force or apply pressure when sanding.
Use only the weight of the tool for pressure.
Excess pressure actually slows the tool down,
and over loads the motor. If faster stock removal
is desired, change to a coarser grit disc.

Remove gummy paint from metal with an “open
coat” disc. Sand until sparks start to appear,
then stop and change to a “closed coat” disc to
remove any remaining paint.

Sanding Wood

When sanding wood the direction of the disc
motion at the contact point should parallel the
grain as much as possible. The rapid cut of
discs and the swirl type scratch pattern they
occasionally create generally prohibit their use
for producing the final finish.

Scratches and circular marks are usually the
result of using too coarse a grit. When changing
to a finer grit, move across the sanding lines that
were made by a previous coarser disc.

scratches. To produce smooth finish, use fine
grit disc.

MASONRY CUTTING

OPERATIONS

For cutting masonry materials like brick, tile,
stone, etc. it is best to use a dry diamond cutting
wheel. The lock nut and backing flange supplied
with this grinder are not intended for use with
dry diamond cutting wheels. Use only lock nut
and flange with equal diameters. The wheel
guard MUST be used with a dry diamond
cutting wheel.

WARNING! Do not use water or other cooling

fluid with this tool for cutting.
Disconnect tool from power source before

attaching cutting wheel. With wheel guard in
place, assemble flange, cutting wheel and lock
nut in order shown on page 2.

When cutting make only small passes through
workpiece at a time. Be aware that “Kickback”
can occur at any time. Keep both hands on tools
for maximum control.

WIRE BRUSH OPERATIONS

Wire brushes are intended to “clean” structural
steel, castings, sheet metal, stone and concrete.
They are used to remove rust, scale and paint.

Before assembling wire brush to this tool
disconnect from the power source. Wire brushes
are equipped with their own threaded hub.
Simply thread on to spindle be sure to seat
against shoulder before turning tool “ON”.

WARNING! Use of any other accessories

not specified in this manual may create a hazard.

Sanding Metal

When sanding automobiles or appliances, wipe
the metal clean with a non-flammable solvent
or a commercial cleaner to remove all wax and
grease. By doing this first, the sanding discs
will sand better and last longer.

For heavy duty work, use a coarse grit disc first.
Follow-up with a medium grit to remove

BM 3609929584 7/01 7/26/01, 12:40 PM8

8

Maintenance and Service

WARNING! Preventive maintenance per-

formed by unauthorized personnel may result
in misplacing of internal wires and components
which could cause serious hazard. We recom­mend that all tool service be performed at a
Bosch Factory Service Center.

Tool Lubrication

Your Bosch tool has been properly lubricated
and is ready for use. We recommend, that the
tools with gears be regreased with a special
gear lubricant at every time the brushes are
changed.

Carbon Brushes

The brushes and commutator in your Bosch
tool have been engineered for many hours of
dependable service. To maintain peak effi­ciency of the motor, we recommend every two
to six month the brushes be examined. Only
genuine Bosch replacement brushes specially
designed for your tool should be used.

Bearings

After about 300-400 hours of operation, or at
every second brush change, the bearings should
be replaced at a Bosch Factory Service Center.
Bearings which become noisy (due to heavy
load or very abrasive material cutting) should
be replaced at once to avoid overheating and
motor failure.

Cleaning

WARNING! To avoid accidents, always

disconnect the tool from the power supply
before cleaning or performing any maintenance.
The tool may be cleaned most effectively with
compressed air. Always wear safety goggles
when cleaning tools with compressed air.

Ventilation openings and switch levers must be
kept clean and free of foreign matter. Do not
attempt to clean by inserting pointed objects
through openings.

CAUTION! Certain cleaning agents and

solvents damage plastic parts. Some of these
are: gasoline, carbon tetrachloride, chlorinated
cleaning solvents, ammonia and household
detergents that contain ammonia.

BM 3609929584 7/01 7/26/01, 12:40 PM9

9

Notes:

BM 3609929584 7/01 7/26/01, 12:40 PM10

10