BOSCH GBH 2-26 DFR Rotary Hammer Drill Instruction Manual

: June 9, 2024
: Bosch

Table of Contents

BOSCH GBH 2-26 DFR Rotary Hammer Drill
Safety Notes
Product Description and Specifications
Product Features
Technical Data
Assembly
Operation
Maintenance and Service
Disposal
References
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Download This Manual (PDF format)

BOSCH GBH 2-26 DFR Rotary Hammer Drill

Safety Notes

General Power Tool Safety Warnings

Read all safety warnings and all instructions. Failure to follow the warnings and instructions 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 mainsoperated (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 and 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 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, clothing and gloves 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.

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 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.

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

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 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.
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.
When working with the machine, always hold it firmly with both hands and provide for a secure stance. The power tool is guided more secure with both hands.
Secure the workpiece. A workpiece clamped with clamping devices or in a vice is held more secure than by hand.
Always wait until the machine has come to a complete stop before placing it down. The tool insert can jam and lead to loss of control over the power tool.

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.

Products sold in AUS and NZ only

Use a residual current device (RCD) with a rated residual current of 30 mA or less.

Product Description and Specifications

Read all safety warnings and all instructions. Failure to follow the warnings and instructions may result in electric shock, fire and/or serious injury.

Intended Use

GBH 2-26 E/RE The machine is intended for hammer drilling in concrete, brick and stone. It is also suitable for drilling without impact in wood, metal, ceramic and plastic. Machines with electronic control and right/left rotation are also suitable for screwdriving.

GBH 2-26 DE/DRE/DFR
The machine is intended for hammer drilling in concrete, brick and stone, as well as for light chiselling work. It is also suitable for drilling without impact in wood, metal, ceramic and plastic. Machines with electronic control and right/left rotation are also suitable for screwdriving.

Product Features

The numbering of the product features refers to the illustration of the machine on the graphics page.

Quick change keyless chuck (GBH 2-26 DFR)
SDS-plus quick change chuck (GBH 2-26 DFR)
SDS-plus tool holder
Dust protection cap
Locking sleeve
Lock ring for rapid-change chuck (GBH 2-26 DFR)
Rotational direction switch (GBH 2-26 RE/DRE/DFR)
Lock-on button for On/Off switch
On/Off switch
Release button for mode selector switch (GBH 2-26 DE/DRE/DFR)
Mode selector switch (GBH 2-26 DE/DRE/DFR)
Button for depth stop adjustment
Depth stop
Auxiliary handle (insulated gripping surface)
Release button for drilling/hammer drilling selector switch (GBH 2-26 E/RE)
Selector switch for drilling/hammer drilling (GBH 2-26 E/RE)
Handle (insulated gripping surface)
Securing screw for key type drill chuck*
Key type drill chuck*
SDS-plus adapter shank for drill chuck*
Drill chuck mounting (GBH 2-26 DFR)
Front sleeve of the quick change keyless chuck (GBH 2-26 DFR)
Retaining ring of the quick change keyless chuck (GBH 2-26 DFR)
Extraction sleeve of the dust extraction attachment*
Clamping screw for the dust extraction attachment*
Depth stop of the dust extraction attachment*
Telescopic pipe of the dust extraction attachment*
Wing bolt of the dust extraction attachment*
Guide pipe of the dust extraction attachment*
Universal bit holder with SDS-plus shank

Accessories shown or described are not part of the standard delivery scope of the product. A complete overview of accessories can be found in our accessories program.

Technical Data

BOSCH-GBH-2-26-DFR-Rotary-Hammer-Drill-fig-14

Assembly

Before any work on the machine itself, pull the mains plug.

Auxiliary Handle

Operate your machine only with the auxiliary handle 14. Changing the position of the auxiliary handle (see figure A) The auxiliary handle 14 can be set to any position for a secure and low-fatigue working posture. – Turn the bottom part of the auxiliary handle 14 in counterclockwise direction and swivel the auxiliary handle 14 to the desired position. Then retighten the bottom part of the auxiliary handle 14 by turning in clockwise direction. Pay attention that the clamping band of the auxiliary handle is positioned in the groove on the housing as intended for.

Adjusting the Drilling Depth

The required drilling depth X can be set with the depth stop 13.

Press the button for the depth stop adjustment 12 and insert the depth stop into the auxiliary handle 14. The knurled surface of the depth stop 13 must face downward.
Insert the SDS-plus drilling tool to the stop into the SDSplus tool holder 3. Otherwise, the movability of the SDSplus drilling tool can lead to incorrect adjustment of the drilling depth.
Pull out the depth stop until the distance between the tip of the drill bit and the tip of the depth stop correspond with the desired drilling depth X.

Selecting Drill Chucks and Tools

For hammer drilling and chiselling, SDS-plus tools are required that are inserted in the SDS-plus drill chuck. For drilling without impact in wood, metal, ceramic and plastic as well as for screwdriving, tools without SDS-plus are used (e.g., drills with cylindrical shank). For these tools, a keyless chuck or a key type drill chuck are required. GBH 2-26 DFR: The SDS-plus quick change chuck 2 can easily be replaced against the quick change keyless chuck 1 provided.

Changing the Key Type Drill Chuck (GBH 2-26 E/RE/DE/DRE)

To work with tools without SDS-plus (e.g., drills with cylindrical shank), a suitable drill chuck must be mounted (key type drill chuck or keyless chuck, accessories).

Mounting the Key Type Drill Chuck

Screw the SDS-plus adapter shank 20 into a key type drill Inserting the Key Type Drill Chuck (see figure C)
Clean the shank end of the adapter shank and apply a light coat of grease.chuck 19. Secure the key type drill chuck 19 with the securing screw 18. Please observe that the securing screw has a left-hand thread.
Insert the key type drill chuck with the adapter shank into the tool holder with a turning motion until it automatically locks.
Check the locking effect by pulling the key type drill chuck.

Removing the Key Type Drill Chuck

Push the locking sleeve 5 toward the rear and pull out the key type drill chuck 19.

Removing the Quick Change Chuck

Pull the lock ring for the quick change chuck 6 toward the rear, hold it in this position and pull off the SDS-plus quick change chuck 2 or the quick change keyless chuck 1 toward the front.
After removing, protect the replacement chuck against contamination.

Inserting the Quick Change Chuck

Before inserting, clean the quick change chuck and apply a light coat of grease to the shank end.
Grasp the SDS-plus quick change chuck 2 or the quick change keyless chuck 1 completely with your hand. Slide the quick change chuck with a turning motion onto the drill chuck mounting 21 until a distinct latching noise is heard.
The quick change chuck is automatically locked. Check the locking effect by pulling the quick change chuck.

Changing the Tool

The dust protection cap 4 largely prevents the entry of drilling dust into the tool holder during operation. When inserting the tool, take care that the dust protection cap 4 is not damaged.

A damaged dust protection cap should be changed immediately. We recommend having this carried out by an after-sales service

Inserting SDS-plus Drilling Tools

The SDS-plus drill chuck allows for simple and convenient changing of drilling tools without the use of additional tools.

GBH 2-26 DFR: Insert the SDS-plus quick change chuck 2.
Clean and lightly grease the shank end of the tool.
Insert the tool in a twisting manner into the tool holder until it latches itself.
Check the latching by pulling the tool.

As a requirement of the system, the SDS-plus drilling tool can move freely. This causes a certain radial run-out at no-load, which has no effect on the accuracy of the drill hole, as the drill bit centres itself upon drilling.

Removing SDS-plus Drilling Tools

Push back the locking sleeve 5 and remove the tool.

Inserting Drilling Tools without SDS-plus (GBH 2-26 E/RE/DE/DRE)

Note: Do not use tools without SDS-plus for hammer drilling or chiselling! Tools without SDS-plus and their drill chucks are damaged by hammer drilling or chiselling.

Insert a key type drill chuck 19 (see “Changing the Key Type Drill Chuck (GBH 2-26 E/RE/DE/DRE)”,
Open the key type drill chuck 19 by turning until the tool can be inserted. Insert the tool.
Insert the chuck key into the corresponding holes of the key type drill chuck 19 and clamp the tool uniformly. – GBH2-26E/RE:
Set the selector switch 16 to the “Drilling” symbol. GBH 2-26 DE/DRE:
Turn the mode selector switch 11 to the “drilling” position.

Removing Drilling Tools without SDS-plus (GBH 2-26 E/RE/DE/DRE)

Turn the sleeve of the key type drill chuck 19 with the drill chuck key in anticlockwise direction until the drilling tool can be removed.

Inserting Drilling Tools without SDS-plus (GBH 2-26 DFR)

Note: Do not use tools without SDS-plus for hammer drilling or chiselling! Tools without SDS-plus and their drill chucks are damaged by hammer drilling or chiselling.

Insert the quick change keyless chuck 1.
Firmly hold the retaining ring 23 of the quick change chuck. Open the tool holder by turning the front sleeve 22 until the tool can be inserted. Tightly hold the retaining ring 23 and firmly turn the front sleeve 22 in the direction of the arrow until a distinct latching noise can be heard.
Check the tight seating by pulling the tool.

Note: If the tool holder was opened to the stop, then the latching noise possibly may be heard while closing the tool holder and the tool holder will not close. In this case, turn the front sleeve 22 once in the opposite direction of the arrow. Afterwards, the tool holder can be closed (tightened) again.

Turn the mode selector switch 11 to the “drilling” position.

Removing Drilling Tools without SDS-plus (GBH 2-26 DFR)

Firmly hold the retaining ring 23 of the quick change chuck. Open the tool holder by turning the front sleeve 22 in the direction of the arrow until the tool can be removed.

Dust Extraction with the Dust Extraction Attachment (Accessory)

Dusts 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 dusts can cause allergic reactions and/or lead to respiratory infections of the user or bystanders.
Certain dusts, such as oak or beech dust, are considered as carcinogenic, especially in connection with wood-treatment additives (chromate, wood preservative). Materials containing asbestos may only be worked by specialists.
As far as possible, use a dust extraction system suitable for the material.
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.
Prevent dust accumulation at the workplace. Dusts can easily ignite.

Mounting the Dust Extraction Attachment

For dust extraction, the dust extraction attachment (accessory) is required. When drilling, the dust extraction attachment retracts so that the attachment head is always close to the surface at the drill hole.

Press the button for depth stop adjustment 12 and remove the depth stop 13. Press button 12 again and insert the dust extraction attachment into the auxiliary handle 14 from the front.
Connect an extraction hose (diameter 19 mm, accessory) to the extraction sleeve 24 of the dust extraction attachment.
The vacuum cleaner must be suitable for the material being worked.
When vacuuming dry dust that is especially detrimental to health or carcinogenic, use a special vacuum cleaner.

Adjusting the Drilling Depth on the Dust Extraction Attachment

The required drilling depth X can also be adjusted when the dust extraction attachment is mounted.
Insert the SDS-plus drilling tool to the stop into the SDSplus tool holder 3. Otherwise, the movability of the SDSplus drilling tool can lead to incorrect adjustment of the drilling depth.
Loosen the wing bolt 28 on the dust extraction attachment.
Without switching the power tool on, apply it firmly to the drilling location. The SDS-plus drilling tool must face against the surface.
Position the guide pipe 29 of the dust extraction attachment in its holding fixture in such a manner that the head of the dust extraction attachment faces against the surface to be drilled. Do not slide the guide pipe 29 further over the telescopic pipe 27 of the dust extraction attachment than required, so that as much as possible of the scale 27 on the telescopic pipe remains visible.
Retighten the wing bolt 28 again. Loosen the clamping screw 25 on the depth stop of the dust extraction attachment.
Move the depth stop 26 on the telescopic pipe 27 in such a manner that the clearance X shown in the figure corresponds with the required drilling depth.
Tighten the clamping screw 25 in this position.

Operation

Starting Operation

Observe correct mains voltage! The voltage of the power source must agree with the voltage specified on the nameplate of the machine. Power tools marked with 230 V can also be operated with 220 V.

Setting the operating mode

GBH 2-26 E/RE:
With the selector switch for drilling/hammer drilling 16, the operating mode of the machine is selected.
To change the operating mode, press the release button 15 and turn the drilling/hammer drilling selector switch 16 to the desired position until it can be heard to latch.
GBH 2-26 DE/DRE/DFR:
The operating mode of the power tool is selected with the mode selector switch 11.
To change the operating mode, push the release button 10 and turn the mode selector switch 11 to the requested position until it can be heard to latch.

Note: Change the operating mode only when the machine is switched off! Otherwise, the machine can be damaged.

GBH 2-26 E/RE GBH 2-26 DE/ DRE/DFR

Position for hammer drilling in concrete or stone

Position for drilling without impact in wood, metal, ceramic and plastic as well as for screwdriving

Vario-Lock position for adjustment of the chiselling position The mode selector switch 11 does not latch in this position

Position for chiselling

Reversing the rotational direction (GBH 2-26 RE/DRE/DFR)

The rotational direction switch 7 is used to reverse the rotational direction of the machine. However, this is not possible with the On/Off switch 9 actuated.

Right rotation: Turn the selector switch for drilling/hammer drilling 7 on both sides to the stop in the position

Left rotation: Turn the selector switch for drilling/hammer drilling 7 on both sides to the stop in the position

Set the direction of rotation for hammer drilling, drilling and chiselling always to right rotation.

Switching On and Off

To start the machine, press the On/Off switch 9.
To lock the On/Off switch, keep it pressed and additionally push the lock-on button 8.
To switch off the machine, release the On/Off switch 9.
When the On/Off switch 9 is locked, press it first and then release it.

Setting the Speed/Impact Rate

The speed/impact rate of the switched on power tool can be variably adjusted, depending on how far the On/Off switch 9 is pressed.Light pressure on the On/Off switch 9 results in low speed/impact
rate. Further pressure on the switch increases the speed/impact rate.

Safety Clutch

If the tool insert becomes caught or jammed, the drive to the drill spindle is interrupted. Because of the forces that occur, always hold the power tool firmly with both hands and provide for a secure stance.
If the power tool jams, switch the machine off and loosen the tool insert. When switching the machine on with the vdrilling tool jammed, high reaction torques can occur.

Working Advice

Before any work on the machine itself, pull the mains plug

Changing the Chiselling Position (Vario-Lock) (GBH 2-26 DE/DRE/DFR)

The chisel can be locked in 36 positions. In this manner, the optimum working position can be set for each application.

Insert the chisel into the tool holder.
Turn the mode selector switch 11 to the “Vario-Lock” position (see “Setting the operating mode”,
Turn the tool holder to the desired chiselling position.
Turn the mode selector switch 11 to the “chiselling” position.
The tool holder is now locked.
For chiselling, set the rotation direction to right rotation.

Inserting Screwdriver Bits

Apply the power tool to the screw/nut only when it is switched off. Rotating tool inserts can slip off.
To work with screwdriver bits, a universal bit holder 30 with SDS-plus shank (accessory) is required.
Clean the shank end of the adapter shank and apply a light coat of grease.
Insert the universal bit holder with a turning motion into the tool holder until it automatically locks.
Check the locking effect by pulling the universal bit holder.
Insert a screwdriver bit into the universal bit holder. Use only screwdriver bits that match the screw head.
To remove the universal bit holder, pull the locking sleeve 5 toward the rear and remove the universal bit holder 30 out of the tool holder.

PARTS

BOSCH-GBH-2-26-DFR-Rotary-Hammer-Drill-fig-25

Maintenance and Service

Before any work on the machine itself, pull the mains plug.
For safe and proper working, always keep the machine and ventilation slots clean.
A damaged dust protection cap should be changed immediately.
We recommend having this carried out by an after-sales service.
Clean the tool holder 3 each time after using.

If the machine should fail despite the care taken in manufacturing and testing procedures, repair should be carried out by an after-sales service centre for Bosch power tools. If the replacement of the supply cord is necessary, this has to be done by Bosch or an authorized Bosch service agent in order to avoid a safety hazard. In all correspondence and spare parts order, please always include the 10-digit article number given on the type plate of the machine.

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. Exploded views and information on spare parts can also be found under: www.bosch-pt.com Bosch’s application service team will gladly answer questions concerning our products and their accessories.

People’s Republic of China China Mainland

Bosch Power Tools (China) Co., Ltd. 567, Bin Kang Road Bin Jiang District 310052 Hangzhou, P.R.China Service Hotline: 4008268484 Fax: (0571) 87774502 E-Mail: contact.ptcn@cn.bosch.com www.bosch- pt.com.cn

Thailand
Robert Bosch Ltd. Liberty Square Building No. 287, 11 Floor Silom Road, Bangrak Bangkok 10500 Tel.: 02 6393111, 02 6393118 Fax: 02 2384783 Robert Bosch Ltd., P. O. Box 2054 Bangkok 10501, Thailand www.bosch.co.th Bosch Service – Training Centre La Salle Tower Ground Floor Unit No.2 10/11 La Salle Moo 16 Srinakharin Road Bangkaew, Bang Plee Samutprakarn 10540 Thailand Tel.: 02 7587555 Fax: 02 7587525

Singapore
Robert Bosch (SEA) Pte. Ltd. 11 Bishan Street 21 Singapore 573943 Tel.: 6571 2772 Fax: 6350 5315 leongheng.leow@sg.bosch.com Toll-Free: 1800 3338333 www.bosch-pt.com.sg

Australia, New Zealand and Pacific Islands
Robert Bosch Australia Pty. Ltd. Power Tools Locked Bag 66 Clayton South VIC 3169 Customer Contact Center Inside Australia: Phone: (01300) 307044 Fax: (01300) 307045 Inside New Zealand: Phone: (0800) 543353 Fax: (0800) 428570 Outside AU and NZ: Phone: +61 3 95415555 www.bosch.com.au

Disposal

The machine, accessories and packaging should be sorted for environmental- friendly recycling. Do not dispose of power tools into household waste! Subject to change without notice.