Bosch 1752, 1754, 1757 User Manual

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Bosch 1752, 1754, 1757 User Manual

BM 1609929A20 3/03 3/12/03 10:35 AM Page 1

IMPORTANT:

IMPORTANT :

IMPORTANTE:

Read Before Using

Lire avant usage

Leer antes de usar

Operating/Safety Instructions

Consignes de fonctionnement/sécurité

Instrucciones de funcionamiento y seguridad

1752

1754

1757

Consumer Information

Renseignement des consommateurs

Información para el consumidor

Toll Free Number:

Appel gratuit :

Número de teléfono gratuito:

1-877-BOSCH99 (1-877-267-2499) http://www.boschtools.com

 

 

 

For English

Parlez-vous français?

¿Habla español?

See page 2

Voir page 12

Ver página 22

BM 1609929A20 3/03 3/12/03 10:35 AM Page 2

 

 

Power Tool Safety Rules

 

 

Read and understand all instructions. Failure to follow all instructions

 

! WARNING

 

 

listed below, may result in electric shock, fire and/or serious personal

injury.

 

 

 

SAVE THESE INSTRUCTIONS

Work Area

Keep your work area clean and well lit.

Cluttered benches and dark areas invite accidents.

Do not operate power tools in explosive atmospheres, such as in the presence of flammable liquids, gases, or dust. Power tools create sparks which may ignite the dust or fumes.

Keep by-standers, children, and visitors away while operating a power tool.

Distractions can cause you to lose control.

Electrical Safety

Double Insulated tools are 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 a polarized outlet. Do not change the plug in any way. Double Insulation eliminates the need for the three wire grounded power cord and grounded power supply system. Before plugging in the tool, be certain the outlet voltage supplied is within the voltage marked on the nameplate. Do not use “AC only” rated tools with a DC power supply.

Avoid body contact with grounded surfaces such as pipes, radiators, ranges and refrigerators. There is an increased risk of electric shock if your body is grounded. If operating the power tool in damp locations is unavoidable, a Ground Fault Circuit Interrupter must be used to supply the power to your tool. Electrician’s rubber gloves and footwear will further enhance your personal safety.

Don't expose power tools to rain or wet conditions. Water entering a power tool will increase the risk of electric shock.

Do not abuse the cord. Never use the cord to carry the tools or pull the plug from an outlet. Keep cord away from heat, oil, sharp edges or moving parts. Replace damaged cords immediately. Damaged cords increase the risk of electric shock.

When operating a power tool outside, use an outdoor extension cord marked "W-A" or "W." These cords are rated for outdoor use and reduce the risk of electric shock. Refer to “Recommended sizes of Extension Cords” in the Accessory section of this manual.

Personal Safety

Stay alert, watch what you are doing and use common sense when operating a power tool. Do not use tool while tired or under the influence of drugs, alcohol, or medication. A moment of inattention while operating power tools may result in serious personal injury.

Dress properly. Do not wear loose clothing or jewelry. Contain long hair. Keep your hair, clothing, and gloves away from moving parts. Loose clothes, jewelry, or long hair can be caught in moving parts. Keep handles dry, clean and free from oil and grease.

Avoid accidental starting. Be sure switch is “OFF” before plugging in. Carrying tools with your finger on the switch or plugging in tools that have the switch “ON” invites accidents.

Remove adjusting keys or wrenches before turning the tool “ON”. A wrench or a key that is left attached to a rotating part of the tool may result in personal injury.

Do not overreach. Keep proper footing and balance at all times. Proper footing and balance enables better control of the tool in unexpected situations.

Use safety equipment. Always wear eye protection. Dust mask, non-skid safety shoes, hard hat, or hearing protection must be used for appropriate conditions.

Tool Use and Care

Use clamps or other practical way to secure and support the workpiece to a stable platform. Holding the work by hand or against your body is unstable and may lead to loss of control.

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Do not force tool. Use the correct tool for your application. The correct tool will do the job better and safer at the rate for which it is designed.

Do not use tool if switch does not turn it “ON” or “OFF”. Any tool that cannot be controlled with the switch is dangerous and must be repaired.

Disconnect the plug from the power source before making any adjustments, changing accessories, or storing the tool. Such preventive safety measures reduce the risk of starting the tool accidentally.

Store idle tools out of reach of children and other untrained persons. Tools are dangerous in the hands of untrained users.

Maintain tools with care. Keep cutting tools sharp and clean. Properly maintained tools, with sharp cutting edges are less likely to bind and are easier to control. Any alteration or modification is a misuse and may result in a dangerous condition.

Check for misalignment or binding of moving parts, breakage of parts, and any other condition that may affect the tools

operation. If damaged, have the tool serviced before using. Many accidents are caused by poorly maintained tools. Develop a periodic maintenance schedule for your tool.

Use only accessories that are recommended by the manufacturer for your model. Accessories that may be suitable for one tool, may become hazardous when used on another tool.

Service

Tool service must be performed only by qualified repair personnel. Service or maintenance performed by unqualified personnel could result in a risk of injury. For example: internal wires may be misplaced or pinched, safety guard return springs may be improperly mounted.

When servicing a tool, use only identical replacement parts. Follow instructions in the Maintenance section of this manual.

Use of unauthorized parts or failure to follow Maintenance Instructions may create a risk of electric shock or injury. Certain cleaning agents such as gasoline, carbon tetrachloride, ammonia, etc. may damage plastic parts.

Angle Sander Safety Rules

Accessories must be rated for at least the speed recommended on the tool warning label. Wheels and other accessories running over rated speed can fly apart and cause injury. 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.

Hold tool by insulated gripping surfaces when performing an operation where the cutting tools may contact hidden wiring or its own cord. Contact with a “live” wire will make exposed metal parts of the tool “live” and shock the operator.

Always use auxiliary handle for maximum control over torque reaction or kick-back.

Operation of the grinder without the side handle could cause loss of control of the grinder, resulting in possible serious personal injury.

Always use proper guard with grinding wheel. A guard protects operator from broken wheel fragments. This tool can be converted to a grinder. When converting your tool from sanding or brushing

operations to grinding operations the proper guard and wheel flanges MUST be installed before proceeding with grinding. 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.

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

Wear proper apparel while using a sander/grinder. Face shield or at least safety goggles, dust mask, leather gloves and shop apron capable of stopping small wheel or workpiece fragments.

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.

Position the cord clear of the spinning grinding wheel or any other sanding accessory. Do not wrap the cord around

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! WARNING

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your arm or wrist. If you lose control and have the cord wrapped around your arm or wrist it may entrap you and cause injury.

Do not use this tool with a "Woodcarving" blade. Such blades create frequent kickback and loss of control.

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.

Do not grind or sand near flammable materials. Sparks from the wheel could ignite these materials.

Before using as 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. Install a new wheel if tool is dropped while grinding. Do not use a wheel that may be damaged.

Fragments from a wheel that bursts during operation will fly away at great velocity possibly striking you or bystanders.

Do not use grinding wheel that is larger than the maximum recommended size for your tool, or worn down damaged wheels from larger grinders. Wheels intended for large angle sander/grinders are not suitable

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for the high speed of a small angle sander/grinder, these wheels may easily burst and the fragments strike you or bystanders.

Do not use depressed hub grinding wheels for cut-off operations. Depressed hub wheels or type 27 wheels are not intended for side loading and may shatter under overload.

Regularly clean the tool's air vents by compressed air. Excessive accumulation of powdered metal inside the motor housing may cause electrical failures.

Direct the discharge of the spinning wire brush away from you. Small particles and tiny wire fragments may be discharged at high velocity during the “cleaning” action with these brushes and may become imbedded in your skin.

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 chemicallytreated 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.

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Symbols

IMPORTANT: Some of the following symbols may be used on your tool. Please study them and learn their meaning. Proper interpretation of these symbols will allow you to operate the tool better and safer.

Symbol

Name

Designation/Explanation

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

V

Volts

Voltage (potential)

 

 

 

 

A

Amperes

Current

 

 

Hz

Hertz

Frequency (cycles per second)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

W

Watt

Power

 

 

kg

Kilograms

Weight

 

min

Minutes

Time

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

s

Seconds

Time

 

 

 

 

 

 

 

 

 

Diameter

Size of drill bits, grinding wheels, etc.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

n0

No load speed

Rotational speed, at no load

.../min

Revolutions or reciprocation per minute

Revolutions, strokes, surface speed,

 

 

 

 

 

 

 

 

 

 

orbits etc. per minute

0

 

 

 

Off position

Zero speed, zero torque...

1, 2, 3, ...

Selector settings

Speed, torque or position settings.

I, II, III,

 

Higher number means greater speed

0

 

 

 

 

 

 

Infinitely variable selector with off

Speed is increasing from 0 setting

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Arrow

Action in the direction of arrow

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Alternating current

Type or a characteristic of current

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Direct current

Type or a characteristic of current

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Alternating or direct current

Type or a characteristic of current

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Class II construction

Designates Double Insulated

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Construction tools.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Earthing terminal

Grounding terminal

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Warning symbol

Alerts user to warning messages

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Ni-Cad RBRC seal

Designates Ni-Cad battery recycling

 

 

 

 

 

 

 

 

 

 

program

 

 

 

 

 

 

 

 

 

 

 

This symbol designates that this tool is listed by Underwriters Laboratories.

This symbol designates that this tool is listed by the Canadian Standards Association.

This symbol designates that this tool is listed to Canadian Standards by Underwriters Laboratories.

This symbol designates that this tool is listed by Underwriters Laboratories, and listed to Canadian Standards by Underwriters Laboratories.

This symbol designates that

this tool complies to NOM Mexican Standards.

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! WARNING

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Functional Description and Specifications

Disconnect the plug from the power source before making any assembly, adjustments or changing accessories. Such preventive

safety measures reduce the risk of starting the tool accidentally.

Angle Sanders

VENTILATION

OPENINGS

SPINDLE LOCK

PADDLE SWITCH

 

MOTOR HOUSING RELEASE LEVER (1754 ONLY)

SIDE HANDLE

SPINDLE

MOUNTING FLANGE

Model number

1752

1754

1757

Spindle thread

5/8"-11 UNC

5/8"-11 UNC

5/8"-11 UNC

Max. sanding disc

9" Dia.

9" Dia.

9" Dia.

*Max. grinding wheel (Type 27)

9" Dia.

9" Dia.

9" Dia.

*Max. flared cup wheel (Type 11)

5” Dia.

5” Dia.

5” Dia.

Max. wire wheel

6" Dia.

6" Dia.

6" Dia.

Max. wire cup brush

6" Dia.

6" Dia.

6" Dia.

*NOTE: Wheel guard must be used when sander is converted for grinding operations.

NOTE: For tool specifications refer to the nameplate on your tool.

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Assembly

Sanding Accessories Assembly

BACKING PAD

! WARNING Before attaching a backing pad 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.

TO INSTALL BACKING PAD AND

SANDING DISC

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

TO REMOVE BACKING PAD AND

SANDING DISC

Disconnect tool from power source. Using the lock nut wrench unscrew the nut from the spindle, while holding spindle lock in.

WIRE BRUSH ASSEMBLY

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”.

SPINDLE LOCK

SPINDLE

 

 

RUBBER

 

BACKING

 

PAD

 

SANDING

 

DISC

SPIN-ON

 

WIRE

LOCK NUT

BRUSH

 

WHEEL GUARD INSTALLATION

! WARNING Wheel guard must be attached when using disc

grinding wheels. Always keep wheel guard between you and your work while grinding.

To attach the wheel guard disconnect tool from the power source, align wheel guard locating tab with key way on mounting flange and slip guard onto mounting flange. Twist into place, always keep the wheel guard between you and your work when grinding. Tighten screw to secure wheel guard.

LOCK NUT AND BACKING FLANGE

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

Disc Grinding Wheel Assembly

Disconnect tool from power source. Be sure that wheel guard is in place for grinding.

When using spin-on grinding wheels, thread directly onto the spindle.

When using mounting wheels, thread BACKING FLANGE onto spindle, then place GRINDING WHEEL on the spindle. Thread on the lock nut and tighten nut using a lock nut wrench provided with adapter kit, while holding the spindle lock in.

TO REMOVE: Reverse

.

MOUNTING

 

FLANGE

SPINDLE

 

WHEEL

 

GUARD

LOCATING

 

TAB

 

BACKING

 

FLANGE

 

DISC

 

GRINDING

 

WHEEL

 

LOCK NUT

SPIN-ON GRINDING

WHEEL

 

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SIDE HANDLE

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

CUP GRINDING WHEELS

Use cup grinding wheels for heavy-duty stock removal of metals, concrete and stone.

ADJUSTABLE CUP

WHEEL GUARD INSTALLATION

Open the guard clamp and fit it on the mounting flange then secure by tightening the clamp screw. ALWAYS HAVE THIS GUARD ATTACHED WHEN USING CUP GRINDING WHEELS

The adjustable guard allows you to lower or raise the guard’s shell. TO ADJUST: Loosen the four bolts on the shell, and secure the shell for 1/4” wheel exposure for maximum safety.

ATTACHING CUP GRINDING WHEEL

Thread the cup grinding wheel on the spindle shaft CLOCKWISE. Press in the spindle lock button and turn the cup grinding wheel until the lock button engages, then tighten the wheel securely by hand.

TO REMOVE: Reverse procedure.

SPINDLE

MOUNTING

FLANGE

ADJUSTABLE

GUARD

SHELL

BOLT

CUP

GRINDING

WHEEL

Operating Instructions

"TRI-CONTROL" PADDLE SWITCH

The “Tri-Control” Paddle Switch enables the operator to control the switch functions of "Lock-OFF", "ON/OFF" and "Lock-ON".

TO UNLOCK SWITCH

 

 

AND

TURN

TOOL

 

 

"ON":

Push

paddle

 

 

lever

FORWARD

1

0

 

(toward the

spindle)

 

 

then

squeeze the

 

 

paddle lever.

 

 

 

TO SWITCH TOOL "OFF": Release pressure on paddle lever. The switch is spring loaded and will return to "OFF" position automatically.

The "Lock-ON" feature, incorporated into the paddle switch, is a convenience for long operations.

TO LOCK SWITCH "ON": After paddle switch has been activated push paddle lever completely FORWARD and release paddle lever.

TO SWITCH TOOL "OFF": Squeeze and then release paddle lever. The switch is spring loaded and will return to "OFF" position automatically.

! WARNING Hold the tool with both hands while starting the

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

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.

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MOTOR HOUSING RELEASE LEVER

(1754 ONLY)

Your tool is equipped with a motor housing release lever that will allow you to rotate the spindle in either direction 90˚. To use this feature, pull release lever in direction of arrow to release housing, and rotate housing until it clicks into place.

Sanding Operations

SELECTING SANDING DISC

Sanding discs are made of extremely hard and sharp aluminum oxide grits, phenolresin bonded to a sturdy fiber backing for fast heavy-duty 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.

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 coat and closed coat” discs are required to get the job done faster. See chart for application examples.

Operation: Refinishing painted wood or metal surfaces.

REMARKS

GRIT

 

 

To remove paint and to smooth

Coarse

surface irregularities.

16-24-30

 

 

To smooth

Medium

the rough sanding.

36-50-80

 

 

To remove scratches left by

Fine

previous discs.

100-120

 

 

To smooth surfaces for painting,

Very Fine

polishing or waxing.

150-180

 

 

SANDING TIPS

For best results, tilt the Disc Sander at a 10° to 15° angle while sanding so that only about 1" of the surface around the edge of the disc contacts the work.

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. 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.

SANDING METAL

When sanding automobiles or appliances, wipe the metal clean with a non-flammable solvent or 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 scratches. To produce smooth finish, use fine grit disc.

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Grinding Operations

ELECTING GRINDING WHEELS

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 exceed the 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 workpiece 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.

! WARNING Excessive or sudden pressure on the wheel will

slow grinding action 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.

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.

!

WARNING

Avoid bouncing and snag-

ging the wire brush, espe-

 

 

cially when working corners, sharp edges etc. This can cause loss of control and kickback.

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