BOSCH GSR 120-LI Professional Cordless Drill Instruction Manual

: October 27, 2023
: Bosch

BOSCH GSR 120-LI Professional Cordless Drill

Instruction

BOSCH-GSR-120-LI-Professional-Cordless-1 BOSCH-
GSR-120-LI-Professional-Cordless-2

Safety Instructions

General Power Tool Safety Warnings
Read all safety warnings, instructions, illustrations and specifications provided with this power tool. Failure to follow all in-structions 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 (cord-less) 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 sur-faces, 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 suit-able for outdoor use reduces the risk of electric shock.
- If operating a power tool in a damp location is un-avoidable, 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 per-sonal 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 in-juries.
- 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 en-ergising power tools that have the switch on invites acci-dents.
- 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 in-jury.
- 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 ex-traction and collection facilities, ensure these are connected and properly used. Use of dust collection can re-duce 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 in-jury 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 de-signed.
- 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 re-move 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.
Battery tool use and care
- Recharge only with the charger specified by the manu-facturer. A charger that is suitable for one type of bat-tery pack may create a risk of fire when used with another battery pack.
- Use power tools only with specifically designated battery packs. Use of any other battery packs may create a risk of injury and fire.
- When battery pack is not in use, keep it away from other metal objects, like paper clips, coins, keys, nails, screws or other small metal objects, that can make a connection from one terminal to another. Shorting the battery terminals together may cause burns or a fire.
- Under abusive conditions, liquid may be ejected from the battery; avoid contact. If contact accidentally oc-curs, flush with water. If liquid contacts eyes, additionally seek medical help. Liquid ejected from the battery may cause irritation or burns.
- Do not use a battery pack or tool that is damaged or modified. Damaged or modified batteries may exhibit unpredictable behavior resulting in fire, explosion or risk of injury.
- Do not expose a battery pack or tool to fire or excessive temperature. Exposure to fire or temperature above 130°C may cause explosion.
- Follow all charging instructions and do not charge the battery pack or tool outside the temperature range specified in the instructions. Charging improperly or at temperatures outside the specified range may damage the battery and increase the risk of fire.
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.
- Never service damaged battery packs. Service of bat-tery packs should only be performed by the manufacturer or authorized service providers.

Safety information for drills and screwdrivers

Safety instructions for all operations

Wear ear protectors when impact drilling. Exposure to noise can cause hearing loss.
Use the auxiliary handle(s). Loss of control can cause personal injury.
Hold the power tool by insulated gripping surfaces, when performing an operation where the cutting ac-cessory or fasteners may contact hidden wiring. Cut-ting accessory or fasteners 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

Never operate at higher speed than the maximum speed rating of the drill bit. At higher speeds, the bit is likely to bend if allowed to rotate freely without contacting the workpiece, resulting in personal injury.
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 warnings

Hold the power tool securely. When tightening and loosening screws be prepared for temporarily high torque reactions.
Secure the workpiece. A workpiece clamped with clamping devices or in a vice is held more secure than by hand.
Use suitable detectors to determine if there are hid-den supply lines or contact the local utility company for assistance. Contact with electric cables can cause fire and electric shock. Damaging gas lines can lead to ex-plosion. Breaking water pipes causes property damage.
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.
In case of damage and improper use of the battery, vapours may be emitted. The battery can set alight or explode. Ensure the area is well ventilated and seek medical attention should you experience any adverse effects. The vapours may irritate the respiratory system.
Do not open the battery. There is a risk of short-circuiting.
The battery can be damaged by pointed objects such as nails or screwdrivers or by force applied externally. An internal short circuit may occur, causing the battery to burn, smoke, explode or overheat.
Only use the battery with products from the manufacturer. This is the only way in which you can protect the battery against dangerous overload.
Protect the battery against heat, e.g. against continuous intense sunlight, fire, dirt, water and moisture. There is a risk of explosion and short- circuiting.
Switch the power tool off immediately if the applica-tion tool becomes blocked. Be prepared for high torque reactions which cause kickback. The applica-tion tool becomes blocked when it becomes jammed in the workpiece or when the power tool becomes over-loaded.

Product Description and Specifications

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

Intended use

The power tool is intended for driving and loosening screws and for drilling in wood, metal, ceramic and plastic. The GSB is also designed for impact drilling in brick, concrete and stone.

Product Features

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

Tool holder
Keyless chuck
Torque presetting ring
Mode selector switch (GSB 120-LI)
Gear selector switch
Rotational direction switch
Battery release button a)
Battery a)
Handle (insulated gripping surface)
On/off switch
“PowerLight”
Screwdriver bita)
Universal bit holder a)
a) Accessories shown or described are not included with the product as standard. You can find the complete selection of accessories in our accessories range.

Technical Data

BOSCH-GSR-120-LI-Professional-Cordless-4

Noise/Vibration Information

BOSCH-GSR-120-LI-Professional-Cordless-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 com-pare power tools. They may also be used for a preliminary estimation of vibration and noise emissions.
The stated vibration level and noise emission value repres-ent the main applications of the power tool. However, if the power tool is used for other applications, with different ap-plication 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 organizing workflows correctly.

Assembly

Remove the battery from the power tool before carrying out work on the power tool (e.g. maintenance, changing tool, etc.). The battery should also be re- moved for transport and storage. There is risk of injury from unintentionally pressing the on/off switch.

Removing the battery (see figure A)

Use only the chargers listed in the technical data. Only these chargers are matched to the lithium-ion battery of your power tool.

Note: The battery is supplied partially charged. To ensure full battery capacity, fully charge the battery in the charger before using your power tool for the first time.
The lithium-ion battery can be charged at any time without reducing its service life. Interrupting the charging process does not damage the battery.
The lithium-ion battery is protected against deep discharge by the “Electronic Cell Protection (ECP)”. A protective circuit switches the cordless dust extractor off when the battery is drained.

Do not continue to press the On/Off switch after the power tool has automatically switched off. The battery can be damaged.

To remove the battery (8), press the release buttons (7) and pull the battery downwards out of the power tool. Do not use force to do this.
Follow the instructions on correct disposal.

Changing the tool (see figure B)

The drill spindle is locked when the on/off switch (10) is not pressed. This makes it possible to change the application tool in the drill chuck quickly, conveniently and easily. Open the keyless chuck (2) by turning it in the direction of rotation ➊ until the tool can be inserted. Insert the tool. Firmly tighten the sleeve of the keyless chuck (2) by turning it by hand in the direction of rotation ➋ until it audibly clicks into place. This will automatically lock the drill chuck.
The lock will disengage again if you turn the sleeve in the op-posite direction to remove the 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 carci-nogenic, especially in connection with wood-treatment ad-ditives (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.

Operation

Starting Operation
Inserting the battery
Note: The use of batteries unsuitable for your power tool can lead to malfunctions or damage to the power tool.
Set the rotational direction switch (6) to the middle position to avoid unintentionally switching it on. Insert the charged battery (8) into the handle until you feel it engage and it is flush with the handle.

Setting the rotational direction (see figure C)
Only operate the rotational direction switch (6) when the power tool is not in use.
The rotational direction switch (6) is used to change the ro-tational direction of the power tool. However, this is not pos-sible while the on/off switch (10) is being pressed.
Right rotation: To drill and to drive in screws, press the ro-tational direction switch (6) through to the left stop.
Left Rotation: To loosen and unscrew screws and nuts, press the rotational direction switch (6) through to the right stop.
Setting the Operating Mode

Drilling
GSR 120-LI:
Set the torque selector setting ring (3) to the “drilling” symbol.
GSB 120-LI:
Set the mode selector switch (4) to the “drilling” symbol.
Screwdriving
GSR 120-LI:
Set the torque selector setting ring (3) to the required torque.
GSB 120-LI:
Set the mode selector switch (4) to the “screw-driving” symbol.
Set the torque selector setting ring (3) to the required torque.
Impact drilling
GSB 120-LI:
Set the mode selector switch (4) to the “impact drilling” symbol.

Preselecting the Torque
The torque presetting ring (3) can be used to preselect the required torque in 20 stages. When the correct setting is used, the application tool will be stopped when the screw is driven flush into the material or once the set torque has been reached. In position the overload clutch is deactivated, e.g. for drilling.
When unscrewing screws, you can select a higher setting or set the tool to the symbol.
Mechanical gear selection

Only operate the gear selector (5) when the power tool is not in use.

You can preselect two speed ranges with the gear selector (5).
Gear I:
Low speed range; for screwdriving or working with a large drilling diameter.
Gear II:
High speed range; for working with a small drilling diameter. If the gear selector switch (5) cannot be pushed all the way, turn the tool holder (1) with the application tool slightly.

Switching on/off
To start the power tool, press and hold the on/off switch
(10).
The lamp (11) lights up when the on/off switch (10) is lightly or fully pressed, meaning that the work area is illuminated in poor lighting conditions.
To switch off the power tool, release the on/off switch (10).

A djusting the Speed
You can adjust the speed of the power tool when it is on by pressing in the on/off switch (10) to varying extents.
A light pressure on the on/off switch (10) results in a low rotational speed. Increased pressure on the switch causes an increase in speed.
Setting the speed/impact rate (GSB 120-LI)
You can adjust the speed/impact rate of the power tool when it is on by pressing in the on/off switch (10) to varying ex-tents. Applying light pressure to the on/off switch (10) results in a low rotational speed/impact rate. Applying increasing pres-sure to the switch increases the speed/impact rate.
Fully automatic spindle lock (Auto-Lock)
The drill spindle, and therefore the tool holder (1), are locked when the on/off switch (10) is not pressed.
This enables screws to be screwed in even when the battery (8) is empty and allows the power tool to be used as a screwdriver.
Run-out brake
Upon releasing the on/off switch (10), the drill chuck is slowed down, which prevents the application tool from con-tinuing to rotate.
When driving in screws, you should therefore only release the on/off switch (10) once the screw has been inserted flush into the workpiece. This way, the head of screw will not penetrate the workpiece.
Practical advice

Only apply the power tool to the screw/nut when the tool is switched off. Rotating tool inserts can slip off.

After working at a low speed for an extended period, you should operate the power tool at the maximum speed for ap-proximately three minutes without load to cool it down. When drilling into metal, only use sharpened HSS drills (HSS = high-speed steel) which are in perfect condition. The Bosch accessory range guarantees appropriate quality. Before screwing larger, longer screws into hard materials, it is advisable to pre-drill a pilot hole with the core diameter of the thread to approx. 2/3 of the screw length.

Maintenance and Service

Maintenance and Cleaning

Remove the battery from the power tool before carrying out work on the power tool (e.g. maintenance, changing tool, etc.). The battery should also be re-moved for transport and storage. There is risk of injury from unintentionally pressing the on/off switch.
To ensure safe and efficient operation, always keep the power tool and the ventilation slots clean.

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 10‑digit 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

Transport
The contained lithium-ion batteries are subject to the Dangerous Goods Legislation requirements. The batteries are suitable for road-transport by the user without further restrictions.
When shipping by third parties (e.g.: by air transport or for-warding agency), special requirements on packaging and la-belling must be observed. For preparation of the item being shipped, consulting an expert for hazardous material is required.
Dispatch battery packs only when the housing is undam-aged. Tape or mask off open contacts and pack up the battery in such a manner that it cannot move around in the packaging. Please also observe the possibility of more de-tailed national regulations.

Disposal
Power tools, rechargeable batteries, accessor-ies and packaging should be sorted for environ-mental-friendly recycling.
Do not dispose of power tools and batteries/re-chargeable batteries into household waste!

Only for EU countries:
According to the Directive 2012/19/EU, power tools that are no longer usable, and according to the Directive
2006/66/EC, defective or used battery packs/batteries, must be collected separately and disposed of in an environ-mentally correct manner.

Only for United Kingdom:
According to Waste Electrical and Electronic Equipment Reg-ulations 2013 (2013/3113) and the Waste Batteries and Accumulators Regulations 2009 (2009/890), power tools that are no longer usable must be collected separately and disposed of in an environmentally friendly manner.
Battery packs/batteries:
Li-ion:
Please observe the notes in the section on transport (see
“Transport”, page 17).