BOSCH 550, 55-225 GTR Professional Instruction Manual
- October 30, 2023
- Bosch
Table of Contents
550, 55-225 GTR Professional
Product Information
The product is a drywall sander manufactured by Robert Bosch Power Tools GmbH. The product comes in two models, GTR 550 and GTR 55-225, with the respective part numbers 3 601 GD4 0.. The sander has a variable speed control and a constant electronics feature for smooth operation. It has a soft start function, and the power consumption is 550 watts for GTR 550 and 340-910 watts for GTR 55-225. The sanding disk diameter is 215 mm for GTR 550 and 225 mm for GTR 55-225. The dust extraction diameter is 45/35 mm for GTR 550 and GTR 55-225, respectively. The weight of the product is 4.1 kg for GTR 550 and 4.8 kg for GTR 55-225. The product comes with a standard delivery kit that includes a soft sanding pad, an intermediate pad, and a grinding plate.
Product Usage Instructions
- Before making any adjustments or maintenance, disconnect the power plug from the power socket.
- To change the sanding pad, follow the instructions below:
- Choose the sanding pad (soft or medium-hard) as per your requirement.
- Attach the intermediate pad (15) to the sanding pad (17).
- To remove the intermediate pad, lift it from the side and pull it off the sanding pad.
- Clean the sanding pad with a brush before attaching a new intermediate pad.
- To change the sanding disk, follow the instructions below:
- Ensure that the teeth of the drive shaft fit into the slots of the sanding disk before attaching it.
- Read all safety instructions before using the product.
- Use a residual current device if using the product in damp conditions to prevent electric shock.
- Keep the work area clean and well-lit.
- Only use original spare parts to repair the product and have it serviced by qualified personnel to ensure its safety.
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 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 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 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 energizing 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 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 jewelry. Keep your hair and clothing 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 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.
- Use the power tool, accessories and tool bits etc. in accordance with these instructions, taking into ac-count the working conditions and the work to be per-formed. 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.
Battery tool use and care
- Recharge only with the charger specified by the manufacturer. A charger that is suitable for one type of battery 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 occurs, 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 battery packs should only be performed by the manufacturer or authorized service providers.
Safety Warnings for Sander
- Only use the power tool for dry sanding. Water entering a power tool will increase the risk of electric shock.
- Warning: Danger of fire! Avoid overheating the work-piece and the sander. Always empty the dust container before taking a break from work. Sanding dust in the dust bag, microfilter, paper bag (or in the filter bag or vacuum cleaner filter) can spontaneously ignite under unfavorable conditions. This risk is increased if the sanding dust is mixed with paint or polyurethane residue or with other chemical substances and if the workpiece is hot as a result of prolonged work.
- Always wait until the power tool has come to a complete stop before placing it down.
- Secure the workpiece. A workpiece clamped with clamping devices or in a vice is held more secure than by hand.
- u 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.
u Connect the power tool to a mains supply that is properly connected to earth. The socket and extension cable must have a fully functioning protective conductor.
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 authorized 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 power tool is intended for dry sanding dry wall that has had filler
applied, ceilings and walls in indoor and outdoor areas, and for removing
coats of paint, adhesive residues and loose plaster.
Product Features
The numbering of the product features refers to the diagram of the power tool on the graphics page.
- Suction power thumbwheel
- Speed preselection thumbwheel
- On/off switch
- Handle (insulated gripping surface)
- Extraction hosea)
- Extraction outlet
- Handle section
- Safety hook
- Clamping lever
- Extension tube
- Sanding head
- Brush segment locking mechanism
- Suction power adjusting lever
- Sanding sheeta)
- Intermediate pad
- Screw for sanding pad
- Sanding pad
- Brush segment
- Connection hose
- Sanding pad holder
- Eccentric screw
- Hose/cable clip)
- Hose clamp
- Inner housing
- Hose mount
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
A) Standard scope of delivery
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
Noise emission values determined according to EN 62841-2-4.
Typically, the A-weighted noise level of the power tool is: Sound pressure
level 84 dB(A); sound power level 95 dB(A). Uncertainty K = 3 dB.
Wear hearing protection!
Vibration total values ah (triax vector sum) and uncertainty K determined
according to EN 62841-2-4: ah < 2.5 m/s2, K = 1.5 m/s2,
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 represent the main
applications of the power tool. However, if the power tool is used for other
applications, with different a-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
- Pull the plug out of the socket before carrying out any work on the power tool.
Changing the Sanding Sheet (see figure A)
To remove the sanding sheet (14), lift it from the side and pull it off the
intermediate pad (15).
Remove dirt and dust from the intermediate pad (15), e.g. with a paintbrush,
before attaching a new sanding sheet.
The surface of the intermediate pad (15) is fitted with a hook-and-loop
fastening, allowing sanding sheets with a hook-and-loop backing to be secured
quickly and easily.
Press the sanding sheet (14) firmly onto the underside of the intermediate pad
(15).
To ensure optimum dust extraction, make sure that the punched holes in the
sanding sheet (14) are aligned with the punched holes in the intermediate pad
(15) and the drilled holes in the sanding pad (17).
Note: An intermediate pad (15) is not required when working with the medium-
hard sanding pad; the sanding sheet (14) is attached directly to the sanding
pad (17). In all other cases, the change is performed as described here.
Selection of the Sanding Plate
- Standard scope of delivery
Changing the Intermediate Pad (see figure A)
An intermediate pad (15) must always be used when work-ing with the soft
sanding pad (part of standard items in-cluded).
To remove the intermediate pad (15), lift it from the side and pull it off the
sanding pad (17).
Remove dirt and dust from the sanding pad (17), e.g. with a paintbrush, before
attaching a new intermediate pad.
The surface of the sanding pad (17) is fitted with a hook-and-loop fastening,
allowing intermediate pads to be se-cured quickly and easily.
Press the intermediate pad (15) firmly against the underside of the sanding
pad (17).
To ensure optimum dust extraction, make sure that the punched holes in the
intermediate pad (15) are aligned with the drilled holes in the sanding pad
(17).
Changing the Sanding Pad (see figure B)
Note: Replace damaged sanding pads (17) immediately.
Pull off the sanding sheet (14) and the intermediate pad (15). Unscrew the
screw (16) completely and remove the sanding pad (17). Attach the new sanding
pad (17) and retighten the screw.
Note: When attaching the sanding pad, make sure that the teeth of the
catch mate with the recesses in the sanding pad.
Note: Damaged sanding pads must only be replaced by an after-sales
service centre authorized to work with Bosch power tools.
Inserting/Removing the Extension Tube
(see figures C–D)
Only use the extension tubes (10) if necessary. The effort required for the
sanding is significantly lower when working without extension tubes.
Note: A maximum of two extension tubes may be inserted.
Undoing the Connection between Sanding Head/Handle Section/Extension Tube (see figure C):
- ➊ Open the clamping lever (9).
- ➋ Open the safety hook (8).
- ➌ Pull the previously connected parts apart.
Fastening the Connection between Sanding Head/Handle Section/Extension Tube (see figure D):
- ➍ Slide the sanding head (11), handle section (7) and/or extension tubes (10) into each other depending on the required connection.
- ➎ Close the safety hook (8).
- ➏ Push the clamping lever (9) until it is at a right angle to the sanding head (11), handle section (7) or extension tube (10).
- ➐ Firmly tighten the eccentric screw (21).
- ➑ Close the clamping lever (9).
Always check that all the connection elements are secured with the safety hooks (8) and clamping levers (9) and are firmly attached.
Dust/chip extraction
Dust from materials can be harmful to health. Touching or breathing in this
dust can trigger allergic reactions and/or cause respiratory illnesses in the
user or in people in the near vicinity.
Certain dusts are classified as carcinogenic.
- Use a dust extraction system that is suitable for the material wherever possible.
- Provide good ventilation at the workplace.
- Always wear a P2 filter class breathing mask.
External dust extraction
Attach the dust extraction hose (5) to the extraction outlet (6) on the handle
section (7).
Connect the dust extraction hose (5) to an extractor (accessory).
The dust extractor must be suitable for the material being worked.
When extracting dry dust that is especially detrimental to health or
carcinogenic, use a special dust extractor.
For large surfaces, use the GAS 35 L/M AFC or GAS 55 L/M AFC dust extractor
since these models guarantee the continuous suction power required.
When working on vertical surfaces, hold the power tool with the dust
extraction hose facing downwards.
Installing/Removing the Hose/Cable Clip (see figure E)
Place the hose/cable clip (22) over the extraction hose (5). Insert the power
cable into the cable groove of the hose/cable clip.
To remove the hose/cable clip (22), pull it off the extraction hose (5) and
remove the power cable from the hose/cable clip.
Operation
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.
Preselecting the Speed
You can preselect the required speed using the speed preselection thumbwheel
(2), even during operation. The higher numbers indicate a high speed, while
the smaller ones represent a low speed.
The Constant Electronic keeps the speed at no load and un-der load virtually
consistent, guaranteeing uniform performance.
The electronic soft start limits the torque when the power tool is switched on
and increases the service life of the motor.
Switching On/Off
- Make sure that you are able to press the On/Off switch without releasing the handle.
To switch on the power tool, slide the on/off switch (3) for-ward so that “I”
appears on the switch.
To switch off the power tool, slide the on/off switch (3) backwards so that
“0” appears on the switch.
Application Overview
Working Advice
- Pull the plug out of the socket before carrying out any work on the power tool.
- Always wait until the power tool has come to a complete stop before placing it down.
- Do not put the power tool down on its side. This could permanently warp the sanding pad.
- This power tool is not suitable for bench-mounted use. It must not be clamped into a vice or fastened to a work-bench, for example.
Sanding Surfaces
Switch the power tool on, place the entire sanding surface against the surface
of the workpiece and apply moderate pressure as you move the sander over the
workpiece. The material removal rate and sanding result are primarily
determined by the choice of sanding sheet, the preselected speed setting and
the contact pressure.
Only immaculate sanding sheets achieve good sanding performance and make the
power tool last longer.
Be sure to apply consistent contact pressure in order to in-crease the
lifetime of the sanding sheets.
Excessively increasing the contact pressure will not lead to increased sanding
performance, rather it will cause more severe wear of the power tool and of
the sanding sheet. Do not use a sanding sheet for other materials after it has
been used to work on metal.
Use only original Bosch-sanding accessories.
Sanding Close to Edges (see figures F–G)
Thanks to the removable brush segment, you can reduce the lateral distance
between the wall/ceiling and the sanding pad.
- Press and hold the locking mechanism (12) for the brush segment (18).
- Swivel the brush segment (18) forwards and remove it.
- To insert, hook the brush segment (18) onto the opposite side of the locking mechanism (12), and swivel it to-wards the sanding head (11) until it clicks into place.
Adjusting the Internal/External Airflow
Depending on the vacuum pressure, the perceived tool weight can be reduced.
You can switch between different air flow operating modes depending on the
intended use. Turn the suction power adjusting lever (13) to one of the 3
positions.
Adjusting suction power
You can adjust the suction power to achieve your preferred balance between
sanding speed and suction power. This regulation is only possible when the
internal airflow is activated (position ③ in the table above).
Adjust the suction power with the thumbwheel (1):
- 1−5: Low to high suction power, suitable for sanding ceilings
- 6: Highest suction power, suitable for sanding walls Start with a low suction power (position 1) and increase slowly, until there is a noticeable contact pressure.
High suction power allows low-fatigue sanding of ceilings and walls. An excessively high suction power can cause the power tool to vibrate, which can make handling more difficult.
Errors – Causes and Corrective Measures
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 authorized to repair Bosch power tools.
Changing the Connection Hose (see figure H)
To remove the connection hose (19), loosen the screw on the hose clamp (23)
with a screwdriver and lift the hose clamp (23) off with the connection hose
(19). Remove the hose clamp (23). Pull out the inner housing (24) of the hose
mount (25) at the other end of the connection hose (19). Hold the inner
housing (24) in place and unscrew the connection hose (19).
To insert a new connection hose (19), hold the inner housing (24) in place and
screw in the new connection hose (19) all the way. Fit the hose clamp (23) on
the other side of the connection hose (19). Position the screw head so that
you can tighten the hose clamp (23) effortlessly on the sanding head (11) with
a screwdriver with a torque of around 2 Nm.
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 re-cycled 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
environment-ally 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.
References
- Invented for life | Bosch Global
- Skånevik Ølen Kraftlag AS
- Location selection | Bosch Power Tools
- Service worldwide
- Bosch Elektrowerkzeuge und Zubehör | Bosch Elektrowerkzeuge
- Bosch el-værktøj | Bosch el-værktøj
- Bosch-sähkötyökalut | Bosch-sähkötyökalut
- Ηλεκτρικά εργαλεία Bosch | Ηλεκτρικά εργαλεία Bosch
- Invented for life | Bosch Global
- Ana Sayfa | Bosch Türkiye
- herramientasbosch.net
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