BOSCH 24 GDS Professional Impact Wrench Instruction Manual

GDS Professional
24 | 30

Original instructions

24 GDS Professional Impact Wrench

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 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 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.

Safety Warnings for Impact Wrenches

• Hold the power tool by insulated gripping surfaces, when performing an operation where the fastener may contact hidden wiring or its own cord. Fasteners 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.
• 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.
• 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.

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.

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 machine is intended for driving in and loosening screws and bolts as well as for tightening and loosening nuts within the respective range of dimension.

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

1. Suspension eye
2. Auxiliary handle
3. Threaded bushing for auxiliary handle
4. On/off switch
5. Rotational direction switch
6. Tool holder
7. Application tool a)
8. Handle (insulated gripping surface)

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

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

| | GDS 24| GDS 30
---|---|---|---
Noise emission values determined according to EN 62841-2-2.
Typically, the A-weighted noise level of the power tool is| | |
Sound pressure level
Sound power level
Uncertainty K
Wear hearing protection!| dB(A)
dB(A)
dB| 95
106
3| 99
110
3
Vibration total values ah (triax vector sum) and uncertainty K determined according to EN 62841-2-2:
Tightening screws and nuts of the maximum permitted size:
ahK| m/s 2
m/s 2| 8
1.5| 13
2

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 accessories 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 accessories, keeping their hands warm, and organising workflows correctly.

Assembly

Changing the Tool

• Pull the plug out of the socket before carrying out any work on the power tool.
• When fitting an application tool, make sure that it is held securely in the tool holder. If the application tool is not held securely in the tool holder, it may become loose and consequently uncontrollable.
  Slide the application tool (7) onto the square drive of the tool holder (6).

Operation

Method of Operation
The tool holder (6) (with the application tool) is driven by an electric motor via a gear and impact mechanism.
The working procedure is divided into two phases: Screwing in and tightening (impact mechanism in action).
The impact mechanism is activated as soon as the screwed connection runs tight and load is therefore put on the motor.
The impact mechanism then converts the power of the motor to steady rotary impacts. When loosening screws or nuts, the process is reversed.

Starting Operation

• 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.
• 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.

Setting the rotational direction

• Only operate the rotational direction switch (5) when the power tool is not in use.

The rotational direction switch (5) is used to change the rotational direction of the power tool. Right rotation: Slide the rotational direction switch (5) all the way down (R).
Left rotation: Slide the rotational direction switch (5) all the way up (L).

Switching on/off
To start, press the on/off switch (4) and keep it pressed.
To switch off, release the on/off switch (4).

Practical advice

• Pull the plug out of the socket before carrying out any work on the power tool.
• Do not operate your power tool without the auxiliary handle (2).
• Only apply the power tool to the screw/nut when the tool is switched off. Rotating tool inserts can slip off.

The torque depends on the impact duration. The maximum achieved torque results from the sum of all individual torques achieved through impact. Maximum torque is achieved after an impact duration of 6–10 seconds. After this duration, the tightening torque is increased only minimally.
Instead, the gearbox housing noticeably heats up.
Note: The consequences of excessive heating include increased wear on all parts of the impact mechanism and a high need for lubricant.
The impact duration is to be determined for each required tightening torque. The actually achieved tightening torque is always to be checked with a torque wrench.

Screw applications with hard, spring-loaded or soft seats
When the achieved torques in an impact series are measured during a test and transferred into a diagram, the result is the curve of a torque characteristic. The height of the curve corresponds with the maximum reachable torque, and the steepness indicates the duration in which this is achieved.
A torque gradient depends on the following factors:

• Strength properties of the screws/nuts

• Type of backing (washer, disc spring, seal)

• Strength properties of the material being screwed/bolted together

• Lubrication conditions at the screw/bolt connection The following application cases result accordingly:

• A hard seat is a metal-to-metal screw application which uses washers. After a relatively short impact duration, the maximum torque is reached (steep characteristic curve).
  Unnecessary long impact duration only causes damage to the machine.

• A spring-loaded seat is also a metal-to-metal screw application but uses spring washers, disc springs, studs or screws/nuts with conical seats. It is also called a springloaded seat when extensions are used.

• A soft seat is a screw application of e.g. metal on wood or a screw application that uses lead washers or fibre washers as backing.

For a spring-loaded seat as well as for a soft seat, the maximum tightening torque is lower than for a hard seat. Also, a clearly longer impact duration is required.
Determining the impact duration
The diagrams (examples) show the tightening torque [Nm] depending on the impact duration [s]:
❶ for hard seat
❷ for soft seat.
The values provided are average values and differ depending on the application. As a control measure, always check the tightening torque with a torque wrench.

Diagram for GDS 24

The maximum torque is achieved:

• After an impact duration of approx. 10 seconds for a hard seat
• After an impact duration of approx. 22 seconds for a soft seat

Diagram for GDS 30

The maximum torque is achieved:

• After an impact duration of approx. 6 seconds for a hard seat
• After an impact duration of approx. 26 seconds for a soft seat

Guide values for maximum screw/bolt tightening torques of commercially available screws/bolts can be found in the following table.

Guide values for maximum screw tightening torques
Figures given in Nm; calculated from the tensional cross-section; utilisation of the yield point: 90% (with friction coefficient µtotal = 0.12). As a control measure, always check the tightening torque with a torque wrench.

Example for determining the impact duration (GDS 30)
Bolt M 24 with property class 8.8 = bolt tightening torque of 650 Nm
From the diagram for GDS 30, 650 Nm results in an impact duration of 0.8 seconds (see “Diagram for GDS 30”, page 13).
Tips
Torsion bars have a shank with a precisely calibrated, reduced diameter. This means that they limit the torque. A torsion bar is slotted between the impact driver and the bit.
As a rule of thumb for application, the following applies: Core diameter of the screw = effective diameter of the torsion bar. The impact duration is to be determined through test screw applications.
A suspension eye (1) is attached to the power tool’s centre of gravity so it can be hung up.
You can use an elbow (accessory) to change the position of the handle. At sub- zero temperatures, the power tool should first be operated at no load for approx. three minutes to improve the lubrication performance in the power tool.

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.

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

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 The Waste Electrical and Electronic Equipment Regulations 2013 (SI 2013/3113) (as amended), products that are no longer usable must be collected separately and disposed of in an environmentally friendly manner.

EU Declaration of Conformity
Impact wrench
Article number
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: *

GDS 24
GDS 30| 0 601 434 108
0 601 435 103| 2006/42/EC
2014/30/EU
2011/65/EU| EN 62841-1:2015
EN 62841-2-2:2014
EN 55014-1:2017+A11:2020
EN 55014-2:2015
EN IEC 61000-3-2:2019
EN 61000-3-3:2013+A1:2019
EN IEC 63000:2018
---|---|---|---
| * Robert Bosch Power Tools GmbH (PT/ECS)
70538 Stuttgart
GERMANY
Thomas Donato Chairman of the
Management Board
| Helmut Heinzelmann
Head of Product Certification

Robert Bosch Power Tools GmbH, 70538 Stuttgart, GERMANY Stuttgart,12.06.2023

Bosch Power Tools
1 609 92A 7YG | (18.07.2023)
Robert Bosch Power Tools GmbH
70538 Stuttgart
GERMANY
www.bosch-pt.com
1 609 92A 7YG (2023.07) TAG / 169 1 609 92A 7YG

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