Scheppach DS920 Drywall Sander - Operating Instructions and Safety Guide

Introduction

Manufacturer: Scheppach GmbH, Günzburger Straße 69, D-89335 Ichenhausen.

This manual provides essential information for the safe and effective use of your new Scheppach DS920 drywall and ceiling sander.

Important Note: The manufacturer is not liable for damages resulting from improper handling, failure to follow instructions, unauthorized repairs, use of non-original parts, incorrect usage, or electrical system failures due to non-compliance with regulations.

Please read this entire manual carefully before assembly and operation. It will help you understand your tool and its intended uses, avoid hazards, save repair costs, reduce downtime, and increase reliability.

Always comply with your country's regulations for operating this tool.

Keep the manual protected from dirt and moisture for future reference. All operators must read and understand this manual before use.

Only trained personnel familiar with the hazards should operate this tool. The minimum required age must be observed.

⚠️ WARNING: Failure to follow these instructions can result in electric shock, fire, and/or serious injury.

Device Description and Scope of Delivery

The device description refers to the illustrations at the beginning of this manual.

Components:

• 1. Grip surface
• 2. Main handle
• 3. On/Off switch
• 4. Connection piece with union nut
• 5. Mains cable
• 6. Speed selection dial
• 7. Ventilation openings
• 8. Flexible sanding head
• 9. Sanding plate
• 10. Brush rim
• 11. Suction hose
• 12. Hose adapter
• 13. Sanding disc
• 14. LED light

Scope of Delivery:

• 1 x Drywall sander
• 1 x Suction hose (11)
• 2 x Hose adapters (12)
• 24 x Sanding discs (13) (various grits)

Before Operation

Unpacking:

1. Carefully remove the power tool from the packaging.
2. Remove all packaging materials and transport securing devices.
3. Check the scope of delivery for completeness and inspect the tool and accessories for any transport damage.

Note: Do not operate the tool if parts are missing or damaged. Contact your dealer.

Keep the packaging until the warranty period expires. Dispose of it environmentally responsibly.

⚠️ WARNING: Power tools and packaging materials are not toys! Keep children away from plastic bags, films, and small parts. Risk of swallowing and suffocation!

Intended Use

This power tool is intended for the large-area dry sanding of drywall for preparation before painting or wallpapering, using suitable sanding discs.

It is not suitable for small areas, corners, or edges. It is also not intended for sanding wallpaper or for wet sanding.

Do not use as a cutting, grinding, or polishing tool, or with wire brushes. Do not use with asbestos-containing materials.

This tool is exclusively for private household use. Any other use is not intended. The user is liable for any resulting damage or injury.

Scheppach tools are not designed for commercial, trade, or industrial use. Warranty is void if used in such environments.

Safety Instructions

⚠️ WARNING: Read all safety instructions, illustrations, and technical data provided with this power tool. Failure to follow instructions may result in electric shock, fire, or serious injury.

Keep all safety instructions and information for future reference.

The term "power tool" in the safety instructions refers to mains-powered tools.

Workplace Safety:

• a) Keep your work area clean and well-lit. Clutter or poor lighting can lead to accidents.
• b) Do not operate the tool in explosive atmospheres where flammable liquids, gases, or dust are present. Sparks from power tools can ignite dust or vapors.
• c) Keep children and other persons away while operating the tool. Distractions can cause loss of control.

Electrical Safety:

• a) The tool's plug must match the socket. Do not modify the plug. Do not use adapter plugs with earthed tools. Unmodified plugs and matching sockets reduce the risk of electric shock.
• b) Avoid body contact with earthed surfaces (pipes, radiators, ovens, refrigerators). Increased risk of electric shock if your body is earthed.
• c) Keep power tools away from rain or moisture. Water ingress increases the risk of electric shock.
• d) Do not use the power cord to carry the tool, hang it, or pull the plug from the socket. Keep the cord away from heat, oil, sharp edges, or moving parts. Damaged or tangled cords increase the risk of electric shock.
• e) When working outdoors, use only extension cords suitable for outdoor use. This reduces the risk of electric shock.
• f) If operating in damp conditions is unavoidable, use a residual current device (RCD). An RCD reduces the risk of electric shock.

Personal Safety:

• a) Be attentive, work sensibly. Do not use the tool if tired, under the influence of drugs, alcohol, or medication. A moment of inattention can lead to serious injury.
• b) Wear personal protective equipment (PPE), including safety glasses. PPE such as dust masks, safety shoes, helmets, or hearing protection (depending on the tool and application) reduces the risk of injury.
• c) Avoid unintentional starting. Ensure the tool is switched off before connecting to power or battery, or when picking it up or carrying it. Carrying the tool with your finger on the switch or connecting it while switched on can cause accidents.
• d) Remove adjustment tools or wrenches before switching on the tool. Tools left in rotating parts can cause injury.
• e) Maintain a balanced stance and footing. This allows better control of the tool in unexpected situations.
• f) Wear appropriate clothing. Avoid loose clothing or jewelry. Keep hair and clothing away from moving parts.
• g) Use dust extraction and collection devices where provided. This can reduce dust hazards.
• h) Do not become complacent. Even with familiar use, always adhere to safety rules. Careless actions can lead to severe injuries in fractions of a second.

Using and Handling the Power Tool:

• a) Do not overload the tool. Use the correct tool for your job. It performs better and safer within its specified capacity.
• b) Do not use a tool with a defective switch. A tool that cannot be switched on or off is dangerous and must be repaired.
• c) Unplug the tool and/or remove the battery before making adjustments, changing accessories, or putting the tool away. This prevents accidental starting.
• d) Store unused tools out of reach of children. Do not allow untrained persons or those who have not read these instructions to use the tool. Untrained users make power tools dangerous.
• e) Maintain tools and accessories with care. Check for proper function of moving parts, ensure no parts are broken or damaged in a way that affects tool function. Have damaged parts repaired before use. Poorly maintained tools are a common cause of accidents.
• f) Keep cutting tools sharp and clean. Sharp, well-maintained tools are less likely to jam and are easier to control.
• g) Use tools and accessories according to these instructions, considering the working conditions and the task. Using tools for unintended applications can lead to dangerous situations.
• h) Keep handles and gripping surfaces dry, clean, and free from oil and grease. Slippery surfaces prevent safe operation and control in unexpected situations.

Service:

• a) Have your tool repaired only by qualified personnel using original spare parts. This ensures the safety of the tool is maintained.

Safety Instructions for All Applications - Sanding, Sandpaper Sanding, Working with Wire Brushes, Polishing, and Cutting:

• a) This power tool is to be used as a sandpaper sander. Follow all safety instructions, illustrations, and data provided. Failure to do so may result in electric shock, fire, or serious injury.
• b) This tool is not suitable for grinding, working with wire brushes, polishing, or cutting. Unintended uses can cause hazards and injuries.
• c) Do not use accessories not specifically intended or recommended by the manufacturer. Attachment does not guarantee safe use.
• d) The rated speed of the accessory must be at least as high as the maximum speed indicated on the power tool. Accessories rotating faster than rated can break and fly off.
• e) The outer diameter and thickness of accessories must match the specifications of your power tool. Incorrectly sized accessories cannot be adequately guarded or controlled.
• f) Grinding discs, flanges, backing pads, or other accessories must fit the spindle of your power tool precisely. Accessories that do not fit properly will rotate unevenly, vibrate excessively, and can lead to loss of control.
• g) Do not use damaged accessories. Before each use, check accessories like grinding discs for chips and cracks, backing pads for cracks or wear, wire brushes for loose or broken wires. If the tool or accessory is dropped, check for damage or use an undamaged accessory. After controlled installation, keep yourself and bystanders clear of the rotating accessory's plane and let the tool run at maximum speed for one minute. Damaged accessories usually break during this test.
• h) Wear appropriate PPE. Use a full face shield, eye protection, or safety glasses as needed. Wear a dust mask, hearing protection, gloves, or a special apron if appropriate to protect from sanding particles. Protect eyes from flying debris. Dust masks must filter the dust generated. Prolonged exposure to loud noise can cause hearing loss.
• i) Maintain a safe distance for other persons from your work area. Anyone entering the work area must wear PPE. Workpiece fragments or broken accessories can fly off and cause injury even outside the immediate work area.
• j) Hold the tool only by the insulated gripping surfaces when performing work where the accessory may contact hidden electrical wiring or the power cord. Contact with a live wire can energize metal parts of the tool, leading to electric shock.
• k) Keep the power cord away from rotating accessories. If you lose control, the cord can be cut or caught, leading to your hand or arm being drawn into the rotating accessory.
• l) Never set the tool down before the accessory has come to a complete stop. A rotating accessory can contact the surface, causing loss of control.
• m) Do not carry the tool while it is running. Your clothing can be caught by the rotating accessory, causing it to embed in your body.
• n) Regularly clean the ventilation slots of your tool. The motor fan draws dust into the housing, and excessive metal dust accumulation can cause electrical hazards.
• o) Do not use the tool near flammable materials. Sparks can ignite these materials.
• p) Do not use accessories that require liquid coolants. Using water or other liquid coolants can cause electric shock.

Kickback and Corresponding Safety Instructions:

Kickback is the sudden reaction to a snagging or jamming rotating accessory, such as a grinding disc, backing pad, or wire brush. Snagging or jamming causes an abrupt stop of the rotating accessory, resulting in an uncontrolled power tool being accelerated in the opposite direction of the accessory's rotation at the point of jamming.

For example, if a grinding disc snags or jams in the workpiece, the edge of the grinding disc that enters the workpiece can catch and cause the disc to break or kick back. The grinding disc then moves towards or away from the operator, depending on the disc's direction of rotation at the snagging point. Grinding discs can also break in this process.

Kickback is the result of misuse or faulty operation of the power tool. It can be prevented by taking appropriate precautions as described below:

• a) Hold the power tool firmly and position your body and arms to allow you to counteract kickback forces. Always use the auxiliary handle, if provided, for maximum control over kickback forces or reaction moments during startup. The operator can control kickback and reaction forces through appropriate precautions.
• b) Never place your hand near rotating accessories. The accessory can move over your hand during kickback.
• c) Do not position your body in the area where the power tool will be moved during kickback. Kickback drives the power tool in the direction opposite to the grinding disc's movement at the snagging point.
• d) Work with particular caution in areas with corners, sharp edges, etc. Prevent accessories from bouncing off the workpiece and jamming. Rotating accessories tend to jam at corners, sharp edges, or when bouncing off. This causes loss of control or kickback.
• e) Do not use chain or toothed saw blades. Such accessories often cause kickback or loss of control.

Safety Instructions for Sandpaper Sanding:

• a) Do not use oversized sanding discs; follow the manufacturer's specifications for disc size. Sanding discs that protrude beyond the backing pad can cause injury, jamming, tearing of the discs, or kickback.

Additional Safety Instructions:

• a) Connect a vacuum cleaner to the supplied adapter for work.
• b) CAUTION! Keep sanding dust away from open flames; dust can be explosive.
• c) Always wear safety glasses and a dust mask when sanding, especially for overhead work or when processing critical materials! Sanding certain materials (e.g., lead paints, some wood and metal types) generates harmful or toxic dust. Contact or inhalation of this dust can endanger the operator or persons nearby.

Vibration and Noise Information:

Minimize noise and vibration:

1. Use only faultless power tools.
2. Maintain and clean the power tool regularly.
3. Adapt your working method to the power tool.
4. Do not overload the power tool.
5. Have the power tool checked if necessary.
6. Switch off the power tool when not in use.

Residual Risks:

Even when operating this power tool correctly, residual risks remain. The following hazards may arise due to the design and execution of this power tool:

• a) Health damage resulting from hand-arm vibrations if the tool is used for extended periods or not handled and maintained properly.
• b) Injuries and material damage caused by flying accessories that are unexpectedly ejected from the tool due to sudden damage, wear, or improper attachment.
• c) Burns and cuts if accessories are touched directly after use and/or with bare skin.

Technical Data

The specified hand-arm vibration value is based on sanding with a sanding disc. Other applications may result in different values.

Noise and vibration values were determined according to EN 62841-1 and EN IEC 62841-2-3.

The specified vibration value has been measured using a standardized test procedure and can be used to compare one power tool with another.

⚠️ WARNING! This power tool generates an electromagnetic field during operation. This field may, under certain circumstances, affect active or passive medical implants. To reduce the risk of serious or fatal injuries, persons with medical implants should consult their doctor and the implant manufacturer before operating the power tool.

⚠️ Warning! Actual vibration values may differ from the stated values depending on how the power tool is used! Take measures to protect yourself against vibration exposure! Consider the entire workflow, including times when the tool is idling or switched off!

Appropriate measures include regular maintenance and care of the tool and accessories, keeping hands warm, taking regular breaks, and good workflow planning!

Installation

1. Join the front and rear parts (Fig. 2) and tighten the screw nut (Fig. 3).

2. Attach the auxiliary handle to the end of the machine, adjust the length, and tighten the screw nut at the end of the machine (Fig. 4).

Sanding Paper Selection:

1. The grit of the sanding paper is indicated on the back. The lower the number, the coarser the grit.
2. Use coarse-grit sandpaper for rough sanding and fine-grit sandpaper for finishing. Sandpapers with aluminum oxide, silicon carbide, or other synthetic abrasives are recommended.
3. Start with a coarse grit and finish with the finest grit if you have various grits available, to achieve a good or smooth sanding result.

Attaching and Changing Sanding Paper

Attach the sanding paper (13) to the sanding plate (9) using the hook-and-loop fastener.

1. Align the sanding paper (13) with the sanding plate (9) and press it evenly.
2. Pull off the sanding paper (13) from the sanding plate (9) to replace it with a new/different one (Fig. 5).

Dust Extraction

⚠️ WARNING! Processing materials like lead paint can release harmful/toxic gases, posing a danger to the user and bystanders! Therefore, use this power tool only with a dust extraction system and protect yourself and others in the work area with appropriate PPE!

A lot of dust is generated when working with this tool. Dust extraction is very useful for keeping your work area clean. A dust extraction system or vacuum cleaner can be connected using the suction hose (11) attached to the dust extraction port.

1. Align the nose of the hose end with the hose adapter (12) (Fig. 3), insert it, and secure it with a right-hand turn (Fig. 7).
2. Connect the vacuum adapter to a suitable dust extraction device, such as a vacuum cleaner (Fig. 8).

Note: Ensure the vacuum cleaner is suitable for use with a power tool.

Brush Rim

The sanding head of this power tool is surrounded by a brush rim (10). This offers two advantages:

• a) The brush rim (10) extends beyond the sanding plate (9) and contacts the surface to be worked on first. This brings the sanding plate parallel to the work surface before the accessory contacts the surface. This prevents a crescent-shaped recess from the edge of the sanding disc.
• b) Furthermore, the brush rim (10) prevents excessive dust development. The bristles prevent dust generated during sanding from escaping outwards; it is instead disposed of by the extraction system. Before each use, ensure the brush rim (10) is intact. Have it replaced if you notice any damage or wear.

Connection to Power Supply

1. Ensure the power tool is switched off. Always move the On/Off switch (3) to the off position before connecting to the power supply.
2. Plug the mains plug into a properly installed socket that meets the technical data requirements.
3. Your power tool is now ready for operation.

Operation

Speed Adjustment:

Adjust the speed according to the application before starting work. Use a low speed for rough sanding and increase the speed for fine work.

1. Adjust the speed by turning the adjustment dial (6). Turn right to decrease speed (Fig. 9).
2. Turn left to increase speed (Fig. 10).

Switching On/Off:

• To switch on: Press the On/Off switch (3).
• For continuous operation: Secure the On/Off switch (3) with the locking button (a) (Fig. 11).
• To switch off: Briefly press the On/Off switch (3).

Note: The accessory continues to rotate briefly after switching off. Wait until the accessory has come to a complete stop before setting the tool down.

Sanding

1. Attach a suitable sanding disc (13) and select an appropriate speed.
2. Hold the power tool securely by the grip surfaces (1, 2) and switch it on as described.
3. Wait for the accessory to reach its full working speed.
4. Guide the sanding plate (9) as parallel to the wall as possible, contacting the surface first with the brush rim (10).
5. Apply slight pressure to the sanding head (8) to bring the accessory into contact with the surface to be worked on.
6. Move the power tool over the surface with even movements.
7. Note: Do not hold the tool on one spot for too long to avoid uneven sanding results.
8. Lift the sanding plate (9) off the surface to be worked on before switching off the power tool.
9. Wait until the accessory has come to a complete stop before setting the tool down.

After Use:

1. Switch off the power tool as described, disconnect it from the power supply, and let it cool down.
2. Clean and maintain the power tool as described below, then store it carefully.

Cleaning, Maintenance, and Repair

⚠️ WARNING! Before performing any work on the power tool itself (e.g., transport, assembly, conversion, cleaning, and maintenance), unplug the mains plug from the socket!

Cleaning:

• a) Keep guards, ventilation openings, and the motor housing as free of dust and dirt as possible.
• b) Wipe the power tool with a clean cloth or blow it out with compressed air at low pressure (max. 3 bar).
• c) Clean the power tool immediately after each use.
• d) Do not use cleaning or solvent agents, as they can attack the plastic parts of the device. Ensure no water can get inside the device.

Replacement of the Mains Cable:

If the mains cable of this power tool is damaged, it must be replaced by the manufacturer, its customer service, or a similarly qualified person to avoid hazards.

Maintenance:

Before and after each use, check the power tool and accessories (e.g., accessories) for wear and damage. Replace them with new ones as described in this manual if necessary. Observe the technical requirements.

Sanding Plate, Brush Rim:

Have the sanding plate (9) and brush rim (10) replaced by a qualified technician with identical new parts if they are damaged or heavily worn.

Service Information:

The following parts are subject to wear and tear due to normal use or are consumables: Carbon brushes, backing pads, brush heads, sanding paper.

* Not necessarily included in the scope of delivery!

Spare parts and accessories are available from our Service Center. Scan the QR code on the title page for this.

Electrical Connection

The installed electric motor is connected and ready for operation. The connection complies with the relevant VDE and DIN regulations. The customer's mains connection and the extension cord used must comply with these regulations.

Damaged Mains Cable:

Mains cables often suffer insulation damage. Causes include pressure points, kinks from improper fastening or routing, cuts from being run over, or damage from being pulled out of the socket. Rips due to insulation aging can also occur.

Such damaged mains cables must not be used and are life-threatening due to insulation damage.

Regularly check electrical cables for damage. Ensure the cable is not connected to the mains when checking.

Electrical cables must comply with relevant VDE and DIN regulations. Only use cables marked H05VV-F. The type designation must be printed on the connection cable.

Connection Type Y:

If the mains cable of this device is damaged, it must be replaced by the manufacturer, its customer service, or a similarly qualified person to avoid hazards.

AC Motor:

• The mains voltage must be 230 V~.
• Extension cords up to 25 m in length must have a cross-section of 1.5 mm².

Connections and repairs to the electrical equipment must only be carried out by a qualified electrician.

For inquiries, please provide the following data: Motor type, machine nameplate data, motor typeplate data.

⚠️ WARNING! The interior of the power tool contains no user-serviceable parts! Never open the power tool! For further maintenance, take it to a qualified specialist!

Storage and Transport

1. When not in use, store the power tool in a dry, well-ventilated place out of reach of children, e.g., on a high shelf or in a locked cabinet.
2. If possible, store the power tool, operating manual, and accessories together in the original packaging. This ensures all information and parts are readily available.
3. Always carry the power tool by its grip surfaces.
4. Pack the power tool to prevent transport damage or use the original packaging.
5. Protect the power tool from vibrations and shocks, especially during transport in vehicles.

Disposal and Recycling

Packaging Disposal:

Packaging materials are recyclable. Please dispose of packaging in an environmentally friendly manner.

Disposal of Electrical and Electronic Equipment (ElektroG):

• Used electrical and electronic equipment must not be disposed of with household waste but must be collected and disposed of separately!
• Rechargeable batteries or batteries that are not permanently installed in the old device must be removed before disposal! Their disposal is regulated by the Battery Act.
• Owners or users of electrical and electronic equipment are legally obliged to return them after use.
• The end-user is responsible for deleting personal data on the old device to be disposed of!
• The symbol of a crossed-out garbage bin means that used electrical and electronic equipment must not be disposed of with household waste.
• Used electrical and electronic equipment can be returned free of charge at the following locations: Public disposal or collection points (e.g., municipal depots). Sales outlets for electrical appliances (stationary and online), provided the retailer is obliged to take them back or offers to do so voluntarily. You can return up to three used electrical appliances per device type, with a maximum edge length of 25 cm, to the manufacturer or another authorized collection point free of charge, without prior purchase of a new device. Further return conditions from manufacturers and distributors can be found from the respective customer service.
• In the case of delivery of a new electrical appliance by the manufacturer to a private household, the manufacturer can arrange for the collection of the used electrical appliance free of charge upon request from the end-user. Please contact the manufacturer's customer service for this.
• These statements apply only to appliances installed and sold in European Union countries and subject to Directive 2012/19/EU. In countries outside the European Union, different regulations for the disposal of used electrical and electronic equipment may apply.
• Apparent malfunctions, faults, or damages are often due to causes that can be resolved by the user. Therefore, check the power tool against the table below before contacting a specialist. In most cases, faults can be resolved quickly.

Troubleshooting

Warranty Conditions

Scheppach products are subject to strict quality control. If a device malfunctions, we apologize and ask you to contact our service department. The following information is for smooth processing and settlement in case of a claim.

For warranty claims within Germany:

1. These warranty conditions govern our additional manufacturer's warranty services for buyers (private end consumers) of new equipment. Statutory warranty claims are not affected.
2. Warranty coverage is limited to defects in material or manufacturing. At Scheppach's discretion, this includes free repair or replacement of the device (possibly with a successor model). Replaced devices or parts become Scheppach's property.
3. Warranty exclusions: Damage due to non-compliance with assembly or operating instructions, improper installation, use under unsuitable environmental conditions, lack of care and maintenance, misuse, overloading, use of non-approved accessories, ingress of foreign objects, transport damage, force majeure, unauthorized modifications, normal wear and tear, use of non-original parts, or devices with missing/unreadable identification labels. Claims for damages and consequential damages are generally excluded.
4. The warranty period is typically 24 months (12 months for batteries/rechargeable batteries) starting from the purchase date, as evidenced by the original receipt. Claims must be reported promptly. Repair or replacement does not extend the warranty period.

Contact Scheppach GmbH's Service Center for warranty claims. Please use the form on their homepage: https://www.scheppach.com/de/service. Do not send devices without prior contact and registration.

Processing time is typically 14 days after receipt at the service center.

Wear parts (e.g., carbon brushes, backing pads, sanding paper) are not always included in the scope of delivery and are subject to wear.

For repairs not covered by warranty, a cost estimate can be provided upon request.

Scheppach GmbH, Günzburger Str. 69, 89335 Ichenhausen (Germany). Phone: +800 4002 4002. Email: service@scheppach.com. Internet: https://www.scheppach.com.

Parts List Diagram

An exploded view diagram shows all the components of the drywall sander and its accessories, with each part numbered for identification.

Declaration of Conformity

Scheppach GmbH declares that the product (SCHEPPACH DRY WALL SANDER - DS920) conforms to EU directives and standards, including:

• 2014/29/EU
• 2014/35/EU
• 2014/30/EU
• 2006/42/EG
• 2011/65/EU* (Restriction of Hazardous Substances)
• 2000/14/EG_2005/88/EG
• 2016/1628/EU

Referenced standards include EN 62841-1, EN IEC 62841-2-3, EN IEC 55014-1, EN IEC 55014-2, EN IEC 61000-3-2, EN 61000-3-3.

This declaration is issued under the sole responsibility of the manufacturer.

Ichenhausen, 04.04.2024