BOSCH 11253VSR, 11255VSR Corded Hammer Drills Instruction Manual

BOSCH 11253VSR, 11255VSR Corded Hammer Drills Instruction Manual

IMPORTANT:
Read Before Using

General Safety Rules

Read all instructions. Failure to follow all instructions listed below may result in electric shock, fire and/or serious injury. The term “power tool” in all of the warnings listed below refers to your mains-operated (corded) power tool or batteryoperated (cordless) power tool.

SAVE THESE INSTRUCTIONS

Work area safety

Keep work area clean and well lit.
Cluttered or 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 children and bystanders away while operating a power tool. Distractions can cause you to lose control.

Electrical safety

Power tool plugs must match the outlet.
Never modify the plug in any way. Do not use any adapter plugs with earthed (grounded) power tools. Unmodified plugs and matching outlets will reduce risk of electric shock.

Avoid body contact with earthed or grounded surfaces such as pipes, radiators, ranges and refrigerators. There is an increased risk of electric shock if your body is earthed or grounded.

Do not 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 for carrying, pulling or unplugging the power tool. Keep cord away from heat, oil, sharp edges or moving parts. Damaged or entangled cords increase the risk of electric shock.

When operating a power tool outdoors, use an extension cord suitable for outdoor use. Use of a cord suitable for outdoor use reduces the risk of electricshock.

Do not use AC only rated tools with a DC power supply. While the tool may appear to work, the electrical components of the ACrated tool are likely to fail and create a hazard to the operator.

If operating the power tool in damp locations is unavoidable a Ground Fault Circuit Interrupter (GFCI) must be used to  supply the power to your tool. GFCI and personal protection devices like electrician’s rubber gloves and footwear will further enhance your personal safety.

Personal safety

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

Use safety equipment. Always wear eye protection. Safety equipment such as dust mask, non-skid safety shoes, hard hat, or hearing protection used for appropriate conditions will reduce personal injuries.

Avoid accidental starting. Ensure the switch is in the off-position before plugging in. Carrying power tools with your finger on the switch or plugging in power tools that have the switch on invites accidents.

Remove any adjusting key or wrench before turning the power tool on. A wrench or a key left attached to a rotating part of the power tool may result in personal injury.

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

Dress properly. Do not wear loose clothing or jewelry. Keep your hair, clothing and gloves away from moving parts. Loose clothes, jewelry or long hair can be caught in moving parts.

If devices are provided for the connection of dust extraction and collection facilities, ensure these are connected and properly used. Use of these devices can reduce dustrelated hazards.

Keep handles dry, clean and free from oil and grease. Slippery hands cannot safely control the power tool.

Power tool use and care

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

Do not use the power tool if the switch does not turn it on and off. Any power tool that cannot be controlled with the switch is dangerous and must be repaired.

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

Store idle power tools out of the reach of children and do not allow persons unfamiliar with the power tool or these instructions to operate the power tool.
Power tools are dangerous in the hands of untrained users.

Maintain power tools. Check for misalignment or binding of moving parts, breakage of parts and any other condition that may affect the power tools operation.
If damaged, have the power tool repaired before use. Many accidents are caused by poorly maintained power tools.

Keep cutting tools sharp and clean.
Properly maintained cutting tools with sharp cutting edges are less likely to bind and are easier to control.

Use the power tool, accessories and tool bits etc., in accordance with these instructions and in the manner intended for the particular type of power tool, taking into account the working conditions and the work to be performed.
Use of the power tool for operations different from those intended could result in a hazardous situation.

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.

Service

Have your power tool serviced by a qualified repair person using only identical replacement parts. This will ensure that the safety of the power tool is maintained.

Develop a periodic maintenance schedule for your tool. When cleaning a tool be careful not to disassemble any portion of the tool since internal wires may be misplaced or pinched or safety guard return springs may be improperly mounted. Certain cleaning agents such as gasoline, carbon tetrachloride, ammonia, etc. may damage plastic parts.

Rotary Hammer Safety Rules

Hold tools by insulated gripping surfaces when performing an operation where the cutting tool 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.

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.

Do not drill, fasten or break into existing walls or other blind areas where electrical wiring may exist. If this situation is unavoidable, disconnect all fuses or circuit breakers feeding this worksite.

Wear ear protectors when using the tool for extended periods. Prolonged exposure to high intensity noise can cause hearing loss.

Use a metal detector to determine if there are gas or water pipes hidden in the work area or call the local utility company for assistance before beginning the operation.
Striking or cutting into a gas line will result in explosion. Water entering an electrical device may cause electrocution.

Always use the side handle for maximum control over torque reaction or kick- back.
Never attempt to operate this tool with one hand. The slip clutch engages if you firmly control the tool during a torque reaction or kickback.

Always wear safety goggles or eye protection when using this tool. Use a dust mask or respirator for applications which generate dust. Safety goggles or eye protection will help deflect fragments of the material that may be thrown toward your face and eyes. Dust generated or gases released from the material you are cutting (i.e. asbestos insulated pipes, radon) may cause respiratory difficulties.

Use thick cushioned gloves and limit the exposure time by taking frequent rest periods. Vibration caused by hammer-drill action may be harmful to your hands and arms.

Position the cord clear of rotating bit. Do not wrap the cord around your arm or wrist.
If cord becomes entangled with the spinning bit it could entrap you causing serious personal injury.

Position yourself to avoid being caught between the tool or side handle and walls or posts. Should the bit become bound or jammed in the work, the reaction torque of the tool could crush your hand or leg.

Do not strike the bit with a handheld hammer or sledge hammer when attempting to dislodge a bound or jammed bit. Fragments of metal from the bit could dislodge and strike you or bystanders.

Never place the tool down until the bit or accessory have come to a complete stop.

Do not use dull or damaged bits and accessories. Dull or damaged bits have a greater tendency to bind in the workpiece.

When removing the bit from the tool avoid contact with skin and use proper protective gloves when grasping the bit or accessory. Accessories may be hot after prolonged use.

Do not run the tool while carrying it at your side. The spinning drill bit may become entangled with clothing and injury may result.

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.

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.

speed, orbits etc. per minute
0| Off position| Zero speed, zero torque…
1, 2, 3, … I, II, III,| Selector settings| Speed, torque or position settings. Higher number means greater speed
| 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.

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.

Maximum Capacities:
Carbide tipped bits| 1″| 1″
Thin wall core bits| 2-5/8″| 2-5/8″

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

Operating Instructions

VARIABLE SPEED CONTROLLED TRIGGER SWITCH

Your tool is equipped with a variable speed trigger switch. The tool speed can be controlled from the minimum to the maximum nameplate RPM by the pressure you apply to the trigger. Apply more pressure to increase the speed and release pressure to decrease speed. This accurate speed control enables you to drill without center punching. It also permits you to use as a power screwdriver.
Bits are available for driving screws as well as running bolts and nuts.

REVERSING SWITCH LEVER

This tool is equipped with a rotating brush reversing system. This results in longer brush life while maximizing power in both forward and  reverse directions. The reverse switch can be operated from either the right or left side of the tool.

FOR FORWARD ROTATION: slide switch to arrow marked forward (Fig. 1).

FOR REVERSE ROTATION: slide the slide switch to arrow marked reverse. NOTE: Tool will not operate in middle position.

SLIP CLUTCH

The tool has an internal preset clutch. The clutch is set such that sufficient force is transmitted to the bit for most drilling conditions but it will slip when bit binds in the hole or the tool is overloaded. Be aware that due to required clutch setting, you may experience a torque reaction an instant before the clutch slips. This torque reaction will twist the body of the rotary hammer in the opposite direction as the bit rotates, i.e., counterclockwise. As clutch is slipping, the bit will most likely stop rotating. When the binding force on the bit is removed the clutch automatically resets. If you experience bit binding and clutch begins to slip, immediately turn the tool “OFF” and correct the condition leading to the bit binding.

AUXILIARY HANDLE

The tool must be supported with the auxiliary handle, which can be swiveled 360˚. To reposition and/or swivel the handle, loosen the hand grip, move the handle to the desired position along the barrel and securely retighten the hand grip (Fig. 2).

DEPTH GAUGE

Your drilling depth can be pre-set and/or repeated by using the depth gauge.
Setting depth: After the auxiliary handle is installed, make sure the accessory has been fully inserted into the tool holder before setting the depth gauge (Fig. 3).

To adjust depth, push the depth gauge release button, slide the depth gauge to desired depth and release pressure on button to lock the depth gauge in place.

SELECTOR DIAL

The selector dial allows the tool to be set for various drilling/hammer drilling applications.
Depress release button and turn selector dial right or left depending on the below applications.

When using demolition or chipping bits such as bull points, chisels, spades, gouges, etc. the “Hammer Only” mode must be selected.

Do not operate the selection dial until the tool come to a complete stop. Shifting during rotation of the chuck can cause damage to the tool.

SELECTOR DIAL – “VARIO-LOCK”

Adjusting the Vario-Lock: The vario-lock can be set in any one of thirty-six (10˚ increments) positions. Choose a position which is best suited for your operation.

Depress release button and turn the selector dial, to the “vario-lock” setting. Next, rotate the locking sleeve, along with the accessory, to the desired position. Then turn the selector dial to the “hammer only” setting and slightly turn the locking sleeve to have it automatically lock into a definite position.

INSTALLING ACCESSORIES

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.

The 11253VSR and 11255VSR Rotary Hammers utilize “SDS-plus” drill bits. The “SDS-plus” system efficiently transfers drilling torque and maximizes the energy delivered per hammer blow.

Clean the insert shank end of the accessory to remove any debris, then lightly grease with a light oil or lubricant.

Insert accessory into the tool holder through the dust shield, while twisting and pushing inward until it locks automatically into place. Pull outward on the accessory to be certain it is locked into the tool holder (Fig. 5).

REMOVING ACCESSORIES

When removing the bit from the tool avoid contact with skin and use proper protective gloves when grasping the bit or accessory. Accessories may be hot after prolonged use.

To remove an accessory, pull the locking sleeve backwards (towards the rear of tool), while pulling the accessory outward. All accessories should be wiped clean after removing (Fig. 6).

HAMMERHOOK™ (Model 11255VSR only)
Your tool is equipped with a convenient hook for hanging your tool. To use, simply open hook until it snaps into the open position (Fig. 7).

When using the HAMMERHOOK™ always be aware that the accessory is exposed.
Always hang the tool in an area where yourself and bystandards can not accidently make contact with the accessory.
To reduce the risk of injury, use care in selecting the location for hanging the tool.

• Select a suitably sized and shaped object that will provide adequate hanging stability.
  An unstable hanging surface could result in the tool unexpectedly falling.

• Insure that the tool is hung out of the way of walkways and working areas with bystanders. The tool could be bumped or a bystander could become entangled in the power supply cord causing the tool to unexpectedly fall.

To reduce the risk of injury, Do not use the hanging hook if it appears damaged or deformed. This could result in unstable hanging and the tool unexpectedly falling.

When not in use, always close hook until it snaps into the closed position.

TOOL TIPS

Following a few simple tips will reduce wear on the tool and the chance of injury to the operator.

NOTE: The high efficiency available from the rotary hammers can only be obtained if sharp and undamaged accessories are used.
The “cost” to maintain sharp and undamaged accessories is more than offset by the “time saved” in operating the tool with sharp accessories.

All hammers require a short period of time to warm up. Depending on the room temperature, this time may vary from approximately 15 seconds (90˚F) to 2 minutes (32˚F). A new hammer requires a break-in period before full performance is realized. This period may require up to 5 hours of operation.
Carbide tipped bits: Used for drilling stone, concrete, cement, brick, cinder block and other unusually hard non-metals. The Rotary Hammer is designed for “SDS” Carbide Tipped Bits up to 3/4 inch diameter.

3 JAW CHUCK

The 3 Jaw Chuck with SDS Shank Adaptor accessory can convert your tool for use with straight shank bits.

You will extend the life of your bits and do neater work if you always put the bit in contact with the workpiece BEFORE pulling the trigger. During operation, hold the drill firmly and exert moderate, steady pressure. Too much pressure at low speed will stall the hammer. Too little pressure will keep the bit from cutting and cause excess friction by sliding over the surface. This can be damaging to the drill and bit.

Shanks of all drill bits should be wiped clean prior to using and immediately after removing.

Recall these instructions for safe operation:

1. Some materials require slow drilling speeds; whereas, others require higher speed to produce the best results.
2. All work must be supported or secured before drilling and steady, even pressure applied in line with the drill bit.
   3. As the drill bit cuts through the opposite side, reduce the pressure and continue running the drill as the bit is withdrawn.

Materials such as glass, porcelain, ceramics, tiles, plastics, etc., should be drilled at low speeds with specially designed drill bits and lubricants.

DRILLING WOOD OR PLASTIC

If backing block is not used, ease up on the pressure just before the bit breaks through the wood to avoid splintering. Complete the hole from the opposite side immediately after the point breaks through. If bit binds, reverse the drilling operation to help remove the bit from the work.

DRILLING METAL

There are two rules for drilling hard materials.
First, the harder the material, the greater the pressure you need to apply to the tool. Second, the harder the material, the slower the speed.
Here are a couple of tips for drilling in metal.
Make a center punch in the material for easier starting. Lubricate the tip of the bit occasionally with cutting oil except when drilling soft metals such as aluminum, copper or cast iron. If the hole to be drilled is fairly large, drill a smaller hole first, then enlarge to the required size, it’s often faster in the long run. Maintain enough pressure to assure that the bit does not just spin in the hole. This will dull the bit and greatly shorten its life.

DRILLING MASONRY

Use carbide-tipped masonry bit for cinder block, mortar, common brick, soft stone and other materials. The amount of pressure to be used is dependent upon the type of material being drilled. Soft materials require less pressure while the hard materials need more pressure to prevent the drill bit from spinning.

Maintenance

Service

Preventive maintenance performed 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 by a Bosch Factory Service Center or Authorized Bosch Service Station.

TOOL LUBRICATION

Your Bosch tool has been properly lubricated and is ready to use. It is recommended that tools with gears be regreased with a special gear lubricant at every brush change.

CARBON BRUSHES

The brushes and commutator in your tool have been engineered for many hours of dependable service. To maintain peak efficiency of the motor, we recommend every two to six months 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 Bosch Factory Service Center or Authorized Bosch Service Station.
Bearings which become noisy (due to heavy load or very abrasive material cutting) should be replaced at once to avoid overheating or motor failure.

Cleaning

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 dry 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.

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.

Accessories

If an extension cord is necessary, a cord with adequate size conductors that is capable of carrying the current necessary for your tool must be used. This will prevent excessive voltage drop, loss of power or overheating. Grounded tools must use 3-wire extension cords that have 3-prong plugs and receptacles.

NOTE: The smaller the gauge number, the heavier the cord.

RECOMMENDED SIZES OF EXTENSION CORDS 120 VOLT ALTERNATING CURRENT TOOLS

Ampere

Rating

| Cord Length in Feet 25
50  100 150| Cord Length in Meters
15 30   60   120
3-6| 18| 16| 16| 14| 0.75| 0.75| 1.5| 2.5
6-8| 18| 16| 14| 12| 0.75| 1.0| 2.5| 4.0
8-10| 18| 16| 14| 12| 0.75| 1.0| 2.5| 4.0
10-12| 16| 16| 14| 12| 1.0| 2.5| 4.0| —
12-16| 14| 12| —| —| —| —| —| —

• 360° Auxiliary Handle
• Depth Gauge
• Carrying Case
• 3-Jaw Chuck
• Straight Chuck SDS Adaptor

(*= standard equipment)
(**= optional accessories)

LIMITED WARRANTY OF BOSCH PORTABLE AND BENCHTOP POWER TOOLS

Robert Bosch Tool Corporation (“Seller”) warrants to the original purchaser only, that all BOSCH portable and benchtop power tools will be free from defects in material or workmanship for a period of one year from date of purchase. SELLER’S SOLE OBLIGATION AND YOUR EXCLUSIVE REMEDY under this Limited Warranty and, to the extent permitted by law, any warranty or condition implied by law, shall be the repair or replacement of parts, without charge, which are defective in material or workmanship and which have not been misused, carelessly handled, or misrepaired by persons other than Seller or Authorized Service Station. To make a claim under this Limited Warranty, you must return the complete portable or benchtop power tool product, transportation prepaid, to any BOSCH Factory Service Center or Authorized Service Station. For Authorized BOSCH Power Tool Service Stations, please refer to your phone directory.

THIS LIMITED WARRANTY DOES NOT APPLY TO ACCESSORY ITEMS SUCH AS CIRCULAR SAW BLADES, DRILL BITS, ROUTER BITS, JIGSAW BLADES, SANDING BELTS, GRINDING WHEELS AND OTHER RELATED ITEMS.

ANY IMPLIED WARRANTIES SHALL BE LIMITED IN DURATION TO ONE YEAR FROM DATE OF PURCHASE. SOME STATES IN THE U.S., SOME CANADIAN PROVINCES DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS, SO THE ABOVE LIMITATION MAY NOT APPLY TO YOU.

IN NO EVENT SHALL SELLER BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES (INCLUDING BUT NOT LIMITED TO LIABILITY FOR LOSS OF PROFITS) ARISING FROM THE SALE OR USE OF THIS PRODUCT. SOME STATES IN THE U.S. AND SOME CANADIAN PROVINCES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATION OR EXCLUSION MAY NOT APPLY TO YOU.

THIS LIMITED WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU MAY ALSO HAVE OTHER RIGHTS WHICH VARY FROM STATE TO STATE IN THE U.S., PROVINCE TO PROVINCE IN CANADA AND FROM COUNTRY TO COUNTRY.

THIS LIMITED WARRANTY APPLIES ONLY TO PORTABLE AND BENCHTOP ELECTRIC TOOLS SOLD WITHIN THE UNITED STATES OF AMERICA, CANADA AND THE COMMONWEALTH OF PUERTO RICO. FOR WARRANTY COVERAGE WITHIN OTHER COUNTRIES, CONTACT YOUR LOCAL BOSCH DEALER OR IMPORTER.

© Robert Bosch Tool Corporation 1800 W. Central Road Mt. Prospect, IL 60056-2230

Call Toll Free for Consumer Information & Service Locations

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

References

• Bosch Power Tools | Boschtools

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