GSS 20-18 A Professional - Sander BOSCH - Free user manual and instructions

Product type	Random orbital sander
Brand	Bosch
Model	GSS 20-18 A Professional
Category	Sander
Supply voltage	230 V
Frequency	50/60 Hz
Power consumption	200 W
Sanding type	Dry sanding
Sanding pad diameter	180 mm
No-load speed	4 000 - 10 000 min⁻¹
Stroke	2 mm
Weight	1.6 kg
Cable length	2.5 m
Dimensions (L x W x H)	250 x 120 x 150 mm
Sound pressure level	81 dB(A)
Sound power level	92 dB(A)
Vibration	< 2.5 m/s²
Protection class	II
Main features	Variable speed, switch lock, extraction system
Maintenance and cleaning	Clean filter, vacuum air vents, replace sanding pad if worn
Safety	Safety switch, quick stop, double insulation
Spare parts and repairability	Repairability index 8.1/10, sanding pad, abrasive pads available
General information	Professional use, supplied with dust bag and sanding pad

Frequently Asked Questions - GSS 20-18 A Professional BOSCH

How to change the sanding pad?

Unplug the tool. Remove the pad screws with a screwdriver, then replace with a new one. Tighten the screws by hand.

How to adjust the sanding speed?

Use the adjustment wheel located on top of the sander. Turn it to select the desired speed, from 4,000 to 10,000 min⁻¹.

How to connect a vacuum cleaner?

Attach the 35 mm diameter vacuum adapter to the sander outlet, then connect the vacuum hose. Ensure the vacuum cleaner is suitable for fine dust.

What type of abrasive to use?

Use 180 mm diameter hook-and-loop abrasive discs with a center hole for dust extraction. The grit depends on the material.

How to clean the sander?

Unplug it. Clean the ventilation slots with a brush or vacuum. The housing can be wiped with a damp cloth.

What to do if the sander vibrates abnormally?

Check that the sanding pad is securely attached and the abrasive is properly stuck. If the problem persists, the bearing may be faulty: consult an authorized repairer.

What is the stroke depth?

The stroke is 2 mm, allowing fine, mark-free sanding.

How to lock the switch for continuous use?

Press the lock button on the switch. To unlock, press the switch again.

What are the noise levels?

The sound pressure level is 81 dB(A) and the sound power level is 92 dB(A). Wear hearing protection.

Where to find spare parts?

Spare parts (pad, abrasive pads, brushes) are available from Bosch dealers and the official website. Refer to the manual for part numbers.

USER MANUAL GSS 20-18 A Professional BOSCH

Original instructions

Original instructions

Original instructions

Original instructions

English ...... Page 6

Français Page 10

GSS 20-18 A

4

English

Safety Instructions

General Power Tool Safety Warnings

WARNING

Read all safety warnings, instructions, illustrations and specifications.

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

Save all warnings and instructions for future reference.

The term "power tool" in the warnings refers to your mains-operated (corded) power tool or battery-operated (cordless) power tool.

Work area safety

▶ Keep work area clean and well lit. Cluttered or dark areas invite accidents. ▶ Do not operate power tools in explosive atmospheres, such as in the presence of flammable liquids, gases or dust. Power tools create sparks which may ignite the dust or fumes. ▶ Keep children and bystanders away while operating a power tool. Distractions can cause you to lose control.

Electrical safety

▶ Power tool plugs must match the outlet. Never modify the plug in any way. Do not use any adapter plugs with earthed (grounded) power tools. Unmodified plugs and matching outlets will reduce risk of electric shock. ▶ Avoid body contact with earthed or grounded surfaces, such as pipes, radiators, ranges and refrigerators. There is an increased risk of electric shock if your body is earthed or grounded. ▶ Do not expose power tools to rain or wet conditions. Water entering a power tool will increase the risk of electric shock. ▶ Do not abuse the cord. Never use the cord for carrying, pulling or unplugging the power tool. Keep cord away from heat, oil, sharp edges or moving parts. Damaged or entangled cords increase the risk of electric shock. ▶ When operating a power tool outdoors, use an extension cord suitable for outdoor use. Use of a cord suitable for outdoor use reduces the risk of electric shock. ▶ If operating a power tool in a damp location is unavoidable, use a residual current device (RCD) protected supply. Use of an RCD reduces the risk of electric shock.

Personal safety

▶ Stay alert, watch what you are doing and use common sense when operating a power tool. Do not use a power tool while you are tired or under the influence of drugs, alcohol or medication. A moment of inattention

while operating power tools may result in serious personal injury.

▶ Use personal protective equipment. Always wear eye protection. Protective equipment such as a dust mask, non-skid safety shoes, hard hat, or hearing protection used for appropriate conditions will reduce personal injuries. ▶ Prevent unintentional starting. Ensure the switch is in the off-position before connecting to a 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 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 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 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 Sander

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. 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 workpiece and the sander. Always empty the dust collector 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 combust under certain conditions, for example if flying sparks are created when sanding metals. 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. Clean the air vents on your power tool regularly. The motor's fan will draw the dust inside the housing and excessive accumulation of powdered metal may cause electrical hazards. 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.

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 of wood, plastic, metal, filler and varnished surfaces.

Product features

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

(1) Orbital stroke rate preselection thumbwheel (GSS 20-18 A) (2) On/off switch (3) Dust bag (GSS 20-18 A) (4) Rear clamping bracket (5) Sanding sheet clamps (2x) (6) Sanding plate (7) Sanding sheet (8) Front clamping bracket (9) Handle (insulated gripping surface) (10) Punch a) (11) Screws for sanding plate (12) Extraction hose a) (13) Extraction outlet (GSS 20-18 A)

a) This accessory is not part of the standard scope of delivery.

Technical data

Orbital sander GSS 20-18 GSS 20-18 A
Article number		3 601 K70 1.. 3 601 K70 1..
Rated power input W 200 200
Orbital stroke rate preselection - ●
No-load speed min	-1	12,000 8,000–12,000
No-load orbital stroke rate min	-1	24,000 16,000–24,000
Orbit diameter mm 2.0 2.0
Sanding sheet dimensions
- Hook-and-loop backing mm	-	93 x 186
- Clamping tension	mm	93 x 230	93 x 230
Sanding plate dimensions	mm	90 x 183	90 x 183

8 | English

Orbital sander GSS 20-18 GSS 20-18 A

Weight A)	kg 1.5 1.6
Protection class		☐/II / II ☐

A) Weight without mains connection cable and without mains plug. The specifications apply to a rated voltage [U] of 230 V. These specifications may vary at different voltages and in country-specific models. Values can vary depending on the product, scope of application and environmental conditions. To find out more, visit www.bosch-professional.com/wac.

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 76 dB(A); sound power level 84 dB(A). Uncertainty K = 3 dB.

Wear hearing protection!

Vibration total values a_n (triax vector sum) and uncertainty K determined according to EN 62841-2-4:

a_n = 3.2 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 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

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

Dust/Chip Extraction

The dust from materials such as lead paint, some types of wood, minerals and metal can be harmful to human 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, such as oak or beech dust, are classified as carcinogenic, especially in conjunction with wood treatment additives (chromate, wood preservative). Materials containing asbestos may only be machined by specialists.

• Use a dust extraction system that is suitable for the material wherever possible.
• Provide good ventilation at the workplace.
• It is advisable to wear a P2 filter class breathing mask.

The regulations on the material being machined that apply in the country of use must be observed.

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

Self-generated dust extraction with dust bag (see figures G-K)

To empty the dust bag, pull the complete dust bag (3) away from the extraction outlet (13).

Unscrew the cap of the dust bag. Empty the dust bag and screw the cap back on.

Place and move the complete dust bag (3) onto the extraction outlet (13) until it lines up precisely with the power tool.

Note: Empty the dust bag (3) in good time to ensure optimum dust extraction.

When working vertical surfaces, hold the power tool in such a manner that the dust bag (3) faces downward.

External dust extraction (see figure L)

Fit a dust extraction hose (12) onto the extraction outlet (13).

Connect the dust extraction hose (12) to an extractor. You will find an overview of connecting to various dust extractors at the end of these operating instructions.

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.

In Germany, wood dust extraction requires extraction devices which have been tested on the basis of TRGS 553; self-generated dust extraction must not be used in the commercial sector. Commercial operators must clarify the specific requirements for other materials with the responsible trade association.

Changing the sanding sheet

Remove dirt and dust from the sanding plate (6), e.g. with a brush, before attaching a new sanding sheet.

To ensure optimum dust extraction, make sure that the punched holes in the sanding sheet are aligned with the drilled holes in the sanding plate.

Sanding sheets with hook-and-loop backing (see figure A)

Only available with some versions of the GSS 20-18 A power tool:

The sanding plate (6) is fitted with a hook-and-loop fastening, allowing sanding sheets with a similar backing to be secured quickly and easily.

Tap the hook-and-loop fastening of the sanding plate (6) before fitting the sanding sheet (7) to facilitate maximum adhesion.

Position the sanding sheet (7) so that it is flush with one side of the sanding plate (6), then place the sanding sheet on the sanding plate and press it on firmly.

To remove the sanding sheet (7), take hold of it by a corner and pull it away from the sanding plate (6).

Sanding sheets without hook-and-loop backing (see figures B–D)

① Unlock both sanding-sheet clamps (5) and swivel them downwards. ② Insert the sanding sheet (7) under the rear clamping bracket (4). Ensure that the sanding sheet (7) is not too short and that it is correctly clamped. Swivel the sanding-sheet clamp (5) back into the starting position and lock it in place. ③ Position the sanding paper so that it fits tightly around the sanding plate (6). Clamp the front part of the sanding sheet under the front clamping bracket (8). Ensure that the sanding sheet (7) is not too short and that it is correctly clamped. Swivel the sanding-sheet clamp (5) back into the starting position and lock it in place.

To remove the sanding sheet (7), unlock both sanding-sheet clamps (5) and pull the sanding sheet out of its bracket. Unperforated sanding sheets, e.g. from rolls or bulk stock sold by the metre, can be perforated using the punch (10) for the purpose of dust extraction. To do this, fit the sanding sheet on the power tool and push the tool down onto the punch (see figure E).

Selecting a sanding sheet

Different sanding sheets are available, depending on the material you are working with and the required surface removal rate:

Grit

red:Wood

40-240

For processing all wood and wood-based materials

For pre-sanding, e.g. of rough and un-even beams and boards	Coarse 40, 60
For surface sanding and levelling of slight irregularities	Medium 80, 100, 120
For finish-sanding and fine sanding of hardwoods	Fine 180, 240

white:Paint

40-320

Grit

For processing paint and lacquer layers or primers such as fillers and bodyfillers

For sanding down paint Coarse 40, 60
For sanding undercoats Medium 80, 100,	120
For final sanding of primers prior to painting	Fine 180, 240,320

Changing the sanding plate (see figure F)

If necessary, the sanding plate (6) can be replaced.

Unscrew the four screws (11) completely and remove the sanding plate (6). Fit the new sanding plate (6) and retighten the screws.

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. 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.

Switching On and Off

Make sure that you are able to press the On/Off switch without releasing the handle.

To start the power tool, push the on/off switch (2) forwards and into the "I" position.

To turn off the power tool, push the on/off switch (2) forwards and into the "0" position.

Preselecting the orbital stroke rate

You can even preselect the orbital stroke rate during operation using the necessary orbital stroke rate preselection thumbwheel (1).

The required orbital stroke rate is dependent on the material and the work conditions and can be determined using practical tests.

Practical 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.

The material removal rate when sanding is primarily determined by the choice of sanding sheet and the preselected orbital stroke rate (1).

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 increase 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 premature failure of the sanding plate.

Do not use a sanding sheet for other materials after it has been used to work on metal.

Use only original Bosch-sanding accessories.

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.

Malaysia

Robert Bosch Sdn. Bhd.(220975-V) PT/SMY

No. 8A, Jalan 13/6

46200 Petaling Jaya

Selangor

Tel.: [phone]

Toll-Free: 1800 880188

Fax: [phone]

E-Mail: [e-mail]

www.bosch-pt.com.my

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.

Robert Bosch Morocco SARL

53, Rue Lieutenant Mahroud Mohamed

20300 Casablanca

Tel.: [phone]

E-Mail: [e-mail]

www.bosch-pt.com/serviceaddresses

www.bosch-pt.com/serviceaddresses

Disposal

Calle Robert Bosch No. 405

www.bosch-pt.com/serviceaddresses

Disposal

www.bosch-pt.com/serviceaddresses

Disposal

www.bosch-pt.com/serviceaddresses

Waste disposal

www.bosch-pt.com/serviceaddresses

38|ไทย

Waste disposal

www.bosch-pt.com/serviceaddresses

Waste disposal

Arkadia Green Park Tower G - 7th floor

Jl. Let. Jend. TB. Simatupang Kav.88

Jakarta 12520

Tel.: [phone]

Fax: [phone]

E-Mail: [e-mail]

www.bosch-pt.co.id

www.bosch-pt.com/serviceaddresses

Disposal

www.bosch-pt.com/serviceaddresses

Disposal

Robert Bosch Morocco SARL

53, شارع الملازم محمد م representatives

20300 Casablanca

www.bosch-pt.com/serviceaddresses

(13)(GSS 20-18 A) Igω

www.bosch-pt.com/serviceaddresses

1 619 PS1 082 1 619 PS1 104

1 619 PS1 081 (GSS 20-18A) 1 619 PS1 100 (GSS 20-18A)

1 619 PS1 105 (GSS 20-18)

∅ 19 mm 2 600 793 009 (3 m) 1 610 793 002 (5 m)

GAS 50 GAS 50 M