BOSCH GBH 12-52 D Perforators Instruction Manual

GBH Professional

12-52 D | 12-52 DV

Original instructions

 
GBH 12-52 DV

Safety instructions

General Power Tool Safety Warnings

WARNING
Read all safety warnings, instructions, illustrations and specifications provided with this power tool. Failure to follow all instructions listed below may result in electric shock, fire and/or serious injury.

Save all warnings and instructions for future reference.
The term “power tool” in the warnings refers to your mains operated (corded) power tool or battery-operated (cordless) power tool.

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 electric shock.
• If operating a power tool in a damp location is unavoidable, use a residual current device (RCD) protected supply. Use of an RCD reduces the risk of electric shock.

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 personal protective equipment. Always wear eye protection. Protective equipment such as a dust mask, non-skid safety shoes, hard hat or hearing protection used for appropriate conditions will reduce personal injuries.
• Prevent unintentional starting. Ensure the switch is in the off-position before connecting to power source and/or battery pack, picking up or carrying the tool. Carrying power tools with your finger on the switch or energising 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 jewellery. Keep your hair and clothing away from moving parts. Loose clothes, jewellery 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 dust collection can reduce dust-related hazards.
• Do not let familiarity gained from frequent use of tools allow you to become complacent and ignore tool safety principles. A careless action can cause severe injury within a fraction of a second.

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 remove the battery pack, if detachable, 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 and accessories. Check for misalignment or binding of moving parts, breakage of parts and any other condition that may affect the power tool’s 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, 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.
• Keep handles and grasping surfaces dry, clean and free from oil and grease. Slippery handles and grasping surfaces do not allow for safe handling and control of the tool in unexpected situations.

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.

Hammer Safety Warnings

Safety instructions for all operations

• Wear ear protectors. Exposure to noise can cause hearing loss.
• Use auxiliary handle(s), if supplied with the tool. Loss of control can cause personal injury.
• Hold the power tool by insulated gripping surfaces, when performing an operation where the cutting accessory may contact hidden wiring or its own cord. Cutting accessory contacting a “live” wire may make exposed metal parts of the power tool “live” and could give the operator an electric shock.

Safety instructions when using long drill bits with rotary hammers

• Always start drilling at low speed and with the bit tip in contact with the workpiece. At higher speeds, the bit is likely to bend if allowed to rotate freely without contacting the workpiece, resulting in personal injury.
• Apply pressure only in direct line with the bit and do not apply excessive pressure. Bits can bend, causing breakage or loss of control, resulting in personal injury.

Additional safety information

• Use suitable detectors to determine if utility lines are hidden in the work area or call the local utility company for assistance. Contact with electric lines can lead to fire and electric shock. Damaging a gas line can lead to explosion. Penetrating a water line causes property damage or may cause an electric shock.
• Always wait until the power tool has come to a complete stop before placing it down. The application tool can jam and cause you to lose control of the power tool.
• Secure the workpiece. A workpiece clamped with clamping devices or in a vice is held more secure than by hand.

Products sold in GB only:

Your product is fitted with an BS 1363/A approved electric plug with internal fuse (ASTA approved to BS 1362). If the plug is not suitable for your socket outlets, it should be cut off and an appropriate plug fitted in its place by an authorised customer service agent. The replacement plug should have the same fuse rating as the original plug. The severed plug must be disposed of to avoid a possible shock hazard and should never be inserted into a mains socket elsewhere.

• Do not touch any application tools or adjacent housing components shortly after operation. These can become very hot during operation and cause burns.
• The application tool may jam during drilling. Make sure you have a stable footing and hold the power tool firmly with both hands. Otherwise you could lose control of the power tool.
• Take care when carrying out demolition work using the chisel. Falling fragments of the demolition material could injure you or any bystanders.
• Hold the power tool firmly with both hands and make sure you have a stable footing. The power tool can be more securely guided with both hands.

Product Description and Specifications

Read all the safety and general instructions. Failure to observe the safety and general instructions may result in electric shock, fire and/or serious injury. Please observe the illustrations at the beginning of this operating manual.

Intended Use

The power tool is intended for hammer drilling in concrete, masonry and stone, as well as for chiselling work.

Product Features

The numbering of the product features refers to the diagram of the power tool on the graphics page.

(1) Dust protection cap
(2) Locking sleeve
(3) Mode selector switch
(4) Vibration damping ( GBH 12-52 DV )
(5) Handle (insulated gripping surface)
(6) On/off switch
(7) Speed preselection thumbwheel
(8) Service indicator
(9) Auxiliary handle (insulated gripping surface)

Technical Data

The specifications apply to a rated voltage [U] of 230 V. These specifications may vary at different voltages and in country specific models.

Noise/Vibration Information

| | GBH 12-52 D| GBH 12-52 DV
---|---|---|---
Noise emission values determined according to EN IEC 62841-2-6.
Typically, the A-weighted noise level of the power tool is:
Sound pressure level| dB(A)| 96| 96
Sound power level| dB(A)| 107| 107
Uncertainty K| dB| 3| 3
Wear hearing protection!
Vibration total values ah (triax vector sum) and uncertainty K determined according to EN IEC 62841-2-6:
Hammer drilling into concrete:
ah| m/s²| 16.4| 10.8
K| m/s²| 1.5| 1.5
Chiselling:
ah| m/s²| 15.4| 10.6
K| m/s²| 1.5| 1.5

The vibration level and noise emission value given in these instructions have been measured in accordance with a standardised measuring procedure and may be used to compare power tools. They may also be used for a preliminary estimation of vibration and noise emissions.
The stated vibration level and noise emission value represent the main applications of the power tool. However, if the power tool is used for other applications, with different application tools or is poorly maintained, the vibration level and noise emission value may differ. This may significantly increase the vibration and noise emissions over the total working period.
To estimate vibration and noise emissions accurately, the times when the tool is switched off or when it is running but not actually being used should also be taken into account. This may significantly reduce vibration and noise emissions over the total working period.
Implement additional safety measures to protect the operator from the effects of vibration, such as servicing the power tool and application tools, keeping their hands warm, and organising workflows correctly.

Assembly

• Pull the plug out of the socket before carrying out any work on the power tool.

Auxiliary handle

• Do not operate your power tool without the auxiliary handle (9).
• Make sure that the auxiliary handle is always tightened. Otherwise you could lose control of the power tool when working.

Swivelling the Auxiliary Handle
You can swivel the auxiliary handle (9) to any angle for a safe work posture that minimises fatigue.
-­ Turn the lower gripping end of the auxiliary handle (9) anticlockwise and swivel the auxiliary handle (9) into the required position. Then turn the lower gripping end of the auxiliary handle (9) clockwise to retighten it. Make sure that the retaining strap of the auxiliary handle slots into the corresponding groove of the housing.

Selecting drill chucks and tools

For hammer drilling and chiselling, you will need SDS max tools, which insert into the SDS max drill chuck.

Changing the Tool

The dust protection cap (1) largely prevents the penetration of drilling dust into the tool holder during operation. When inserting the tool, make sure that the dust protection cap (1) does not become damaged.

• Replace a damaged dust protection cap immediately.
  It is recommended that you have use an after-sales service for this.

Changing the Tool (SDS max)
Inserting the Application Tool (see figure A)
With the SDS-max tool holder, you can change the application tool simply and easily without additional aids.
-­ Clean and lightly grease the shank of the application tool.
-­ Push the locking sleeve (2) back and insert the application tool by turning it into the tool holder. Release the locking sleeve (2) to lock the application tool.
-­ Check that it is locked by pulling on the tool.
Removing the application tool (see figure B)
­- Push the locking sleeve (2) back and remove the application tool.

Dust/Chip Extraction

Dust from materials such as lead-containing coatings, some wood types, minerals and metal can be harmful to one’s health. Touching or breathing-in the dust can cause allergic reactions and/or lead to respiratory infections of the user or bystanders.

Certain dust, such as oak or beech dust, is considered carcinogenic, especially in connection with wood-treatment additives (chromate, wood preservative). Materials containing asbestos may only be worked by specialists.
-­ Provide for good ventilation of the working place.
-­ It is recommended to wear a P2 filter-class respirator.

Observe the relevant regulations in your country for the materials to be worked.

• Avoid dust accumulation at the workplace. Dust can easily ignite.

Operation

• Products that are only sold in AUS and NZ: Use a residual current device (RCD) with a nominal residual current of 30 mA or less.

Start-up

• Pay attention to the mains voltage. The voltage of the power source must match the voltage specified on the rating plate of the power tool. Power tools marked with 230 V can also be operated with 220 V.

Setting the Operating Mode

The operating mode of the power tool is selected using the mode selector switch (3).
-­ To change the operating mode, turn the mode selector switch (3) to the required position.

• Note: Only change the operating mode when the power tool is switched off. Otherwise, the power tool may become damaged.

Position for hammer drilling
If the application tool does not start rotating straight away, run the power tool slowly until the application tool starts rotating.

Vario-Lock position for changing the chiselling position

**Position for chiselling**

Switching On and Off in Drilling Mode
­- To start the power tool, press the on/off switch (6) and keep it pressed.
­- To switch off , release the on/off switch (6).

Switching On and Off in Chiselling Mode
-­ To start the power tool, push the on/off switch (6) upwards ( I ) until it locks in place.
­- To switch off the power tool, push the on/off switch (6) back down (0) and release it.

For low temperatures, the power tool reaches the full hammer/impact capacity only after a certain time.

Changing the chiselling position (Vario-Lock)
You can lock the chisel in 16 different positions, allowing you to select the optimum working position for each task.
-­ Insert the chisel into the tool holder.
-­ Turn the mode selector switch (3) to the “drilling” position.
­- Turn the application tool to the required chisel position.
-­ Turn the mode selector switch (3) to the “chiselling” position. With this, the tool holder is locked.

Adjusting the Speed/Impact Rate
The electronic control enables continuous speed and impact rate preselection for material-specific adjustments.
-­ Select the impact rate with the thumbwheel (7) according to the material.

The information in the table below describes the recommended values.

Removing tiles
Working on brick
Working on concrete

Practical Advice

Overload clutch

• If the application tool jams or snags, the power transmission to the drill spindle will be interrupted. Always hold the power tool firmly with both hands to withstand the forces this may create and adopt a position with stable footing.
• Switch the power tool off immediately and remove the application tool if the power tool becomes blocked. Switching on when the drilling tool is blocked may cause high torque reactions.

Vibration damping
GBH 12-52 DV
The integrated vibration damping function reduces the generated vibration.

• Do not continue to use the power tool if the damping element is damaged.

Sharpening Chisels
Only sharp chiselling tools will produce good results, therefore sharpen your chiselling tools in good time before use. This will ensure a long service life for the tools and good work results.

Re-sharpening
Grind chiselling tools against sanding discs, e.g. aluminium oxide, under a steady stream of water. Make sure that the cutting edges show no annealing colours; this will impair the hardness of the chiselling tools.
To forge a chisel, heat it to 850­1050 °C (pale red to yellow).
To harden a chisel, heat it to approx. 900 °C and quench in oil. Then, leave it in an oven for approx. one hour at 320 °C (annealing colour: pale blue).

Maintenance and Service

Maintenance and Cleaning

• Pull the plug out of the socket before carrying out any work on the power tool.
• To ensure safe and efficient operation, always keep the power tool and the ventilation slots clean.

In order to avoid safety hazards, if the power supply cord needs to be replaced, this must be done by Bosch or by an after-sales service centre that is authorised to repair Bosch power tools.

• Replace a damaged dust protection cap immediately.
  It is recommended that you have use an after-sales service for this. ­
  – Clean the tool holder after each use.

Service indicator
When the carbon brushes are worn out, the power tool switches itself off. This is indicated approx. 8 hours beforehand by the service indicator (8) lighting up or flickering. The power tool must be sent to customer service for maintenance. For addresses, see: (see “After-Sales Service and Application Service”, page 15)

After-Sales Service and Application Service

Our after-sales service responds to your questions concerning maintenance and repair of your product as well as spare parts. You can find explosion drawings and information on spare parts at: www.bosch-pt.com
The Bosch product use advice team will be happy to help you with any questions about our products and their accessories.
In all correspondence and spare parts orders, please always include the 10digit article number given on the nameplate of the product.

Great Britain
Robert Bosch Ltd. (B.S.C.)
P.O. Box 98
Broadwater Park
North Orbital Road
Denham Uxbridge
UB 9 5HJ
At www.bosch-pt.co.uk you can order spare parts or arrange the collection of a product in need of servicing or repair.
Tel. Service: (0344) 7360109
E-Mail: boschservicecentre@bosch.com
You can find further service addresses at:
www.bosch-pt.com/serviceaddresses

Disposal

The power tool, accessories and packaging should be recycled in an environmentally friendly manner.
Do not dispose of power tools along with household waste.
Only for EU countries:
According to the European Directive 2012/19/EU on Waste Electrical and Electronic Equipment and its implementation into national law, power tools that are no longer usable must be collected separately and disposed of in an environmentally friendly manner.
If disposed incorrectly, waste electrical and electronic equipment may have harmful effects on the environment and human health, due to the potential presence of hazardous substances.
Only for United Kingdom:
According to Waste Electrical and Electronic Equipment Regulations 2013 (2013/3113), power tools that are no longer usable must be collected separately and disposed of in an environmentally friendly manner.

1 600 A00 1G9 1 600 A00 1G7

2 608 002 021   1 600 A00 1G8

EU Declaration of Conformity| We declare under our sole responsibility that the stated products comply with all applicable provisions of the directives and regulations listed below and are in conformity with the following standards. Technical file at: *
---|---
Rotary Hammer   Article number
GBH 12-52 D | 3 611 B66 100

3 611 B66 130

3 611 B66 160

| 2006/42/EC 2014/30/EU 2011/65/EU| EN 62841-1:2015

EN IEC 62841-2-6:2020+A11:2020

EN 55014-1:2017+A11:2020

EN 55014-2:2015

EN IEC 61000-3-2:2019+A1.2021

EN 61000-3-3:2013+A1:2019+A2:2021

EN IEC 63000:2018

---|---|---|---
GBH 12-52 DV| 3 611 B66 000

3 611 B66 030

3 611 B66 060

|

| * Robert Bosch Power Tools GmbH (PT/ECS) 70538 Stuttgart GERMANY
Henk Becker Chairman of Executive Management| Helmut Heinzelmann Head of Product Certification
|
Robert Bosch Power Tools GmbH, 70538 Stuttgart, GERMANY Stuttgart, 05.10.2022

Declaration of Conformity

Rotary hammer         Article number
GBH 12-52 D           3 611 B66 160
GBH 12-52 DV        3 611 B66 060

We declare under our sole responsibility that the stated products comply with all applicable provisions of the regulations listed below and are in conformity with the following standards.

Technical file at: Robert Bosch Ltd. (PT/SOP-GB), Broadwater Park, North Orbital Road, Uxbridge UB9 5HJ, United Kingdom

The Supply of Machinery (Safety) Regulations 2008
The Electromagnetic Compatibility Regulations 2016
The Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment Regulations 2012

EN 62841-1:2015
EN IEC 62841-2-6:2020+A11:2020
EN 55014-1:2017+A11:2020
EN 55014-2:2015
EN IEC 61000-3-2:2019+A1.2021
EN 61000-3-3:2013+A1:2019+A2:2021
EN IEC 63000:2018

Robert Bosch Power Tools GmbH, 70538 Stuttgart, Germany represented (in terms of the above regulations) by Robert Bosch Limited, Broadwater Park, North Orbital Road, Uxbridge UB9 5HJ, United Kingdom

Vonjy Rajakoba
Managing Director – Bosch UK

Martin Sibley
Head of Sales Operations and Aftersales

Robert Bosch Ltd. Broadwater Park, North Orbital Road, Uxbridge UB9 5HJ, United Kingdom, as authorised representative acting on behalf of Robert Bosch Power Tools GmbH, 70538 Stuttgart, Germany

Place of issue: Uxbridge                    Date of issue: 05/10/2022

Robert Bosch Power Tools GmbH
70538 Stuttgart
GERMANY

www.bosch-pt.com

1 609 92A 747 (2022.10) PS / 185

1 609 92A 747

Documents / Resources

| BOSCH GBH 12-52 D Perforators [pdf] Instruction Manual
12-52 D Rotary Hammer, 12-52 D, Rotary Hammer, Hammer
---|---

References

• Invented for life | Bosch Global
• Početna strana | Bosch u Srbiji
• 巧米网为您服务！(QiaoMi.com)
• Skånevik Ølen Kraftlag AS
• Електроінструменти Bosch | Bosch Professional
• Электроинструменты Bosch | Bosch Professional
• Bosch Power Tools | Bosch Power Tools
• Location selection | Bosch Power Tools
• Електроинструменти на Bosch | Електроинструменти на Bosch
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• Elektronarzędzia Bosch | Elektronarzędzia Bosch
• Scule electrice Bosch | Scule electrice Bosch
• Bosch električni alati | Bosch električni alati
• Bosch Услуги | Электроинструменты Bosch
• Elektrické náradie Bosch | Elektrické náradie Bosch
• Invented for life | Bosch Global
• Ana Sayfa | Bosch Türkiye
• Početna | Bosch u Hrvatskoj
• herramientasbosch.net

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