scheppach 7906100719 Pneumatic Orbital Sander Instruction Manual

Art.Nr. 7906100719
AusgabeNr. 79061007853
**Rev.Nr. 12/01/2016

**

Pneumatic Orbital Sander
Translation of Original Operating Manual

Explanation of the symbols on the equipment

| Caution – Read the operating instructions to reduce the risk of inquiry
---|---
| Wear safety goggles!
| Wear ear-muffs!
| Wear a breathing mask!

Introduction MANUFACTURER:

scheppach
Fabrikation von Holzbearbeitungsmaschine
GmbH Günzburger Straße 69
D-89335 Ichenhausen

DEAR CUSTOMER,
We hope your new tool brings you much enjoyment and success.
NOTE:
According to the applicable product liability laws, the manufacturer of the device does not assume liability for damages to the product or damages caused by the the product that occurs due to:

• Improper handling,
• Non-compliance of the operating instructions,
• Repairs by third parties, not by authorized service technicians,
• Installation and replacement of non-original spare parts,
• Application other than specified,

Intended use
This compressed air-powered random orbital sander is suitable for sanding, polishing, and for the preparation of various surfaces. Any other usage of or modification to the appliance is deemed to be improper and carries a significant risk of accidents. The manufacturer accepts no responsibility for damage(s) resulting from improper usage. This appliance is intended only for domestic use.

Features

1. Housing
2. Blocking device
3. Trigger
4. Handle
5. Connector nipple
6. Speed controller
7. Spindle lock
8. Eccentric spindle with grinding disc socket
9.  Grinding disc
10. Protective cuff
11. Sandpaper disc
12. Oil container

Technical data

WARNING!
The noise emission levels specified in these instructions have been measured in accordance with the standardized measuring procedure specified in ISO 15744 and can be used to make equipment comparisons. The noise emission values vary in accordance with the use of the compressed air tool and may be higher than the values specified in these instructions in some cases. It is easy to underestimate the noise emission load if the compressed air tool is used regularly in a certain manner.

NOTE
For an accurate estimate of the noise emission load during a certain working period, the times during which the appliance is switched off or is running but not actually being used must also be taken into consideration. This can significantly reduce the noise emission load over the total working period.

General safety instructions for compressed air tools
WARNING! For multiple hazards: Please ensure that you have read and understood the safety instructions before adjusting, operating, repairing, maintaining, or replacement of accessories on the sander or polisher as well as before working in the vicinity of the machine. Failure to do this can result in serious bodily injury.

• The sander or polisher should only be adjusted, set or used by adequately qualified and trained operators.
• This sander or polisher may not be modified. Modifications can reduce the effectiveness of the safety measures and increase the risks for the operator.
• Do not use a sander or polisher if the tool has been damaged.
• The appliance must be inspected regularly to ensure that it is labeled with the required rated values and markings given in this manual. The user must contact the manufacturer to obtain replacement labels if necessary.

Save all warnings and safety instructions for future reference. The safety instructions should not be lost – give them to the operator.
Hazards caused by flying parts

• If a workpiece or accessory or even part of the machine tool itself breaks, parts can be flung out at high speeds.
• When operating the sander or polisher or when exchanging accessories on the appliance, always wear eye protection. The degree of necessary protection must be evaluated separately for each individual task.
• Wear a safety helmet if working above head height. In this case, the risks for others should also be assessed.
• You must ensure that the workpiece has been securely fixed.
• Ensure that the sparks generated during use cannot cause any hazards.
• Disconnect the grinder from the power supply before replacing the grinding material and before carrying out maintenance work.
• In this case, the risks for others should also be assessed.

Hazards caused by entanglement

• Suffocation, scalping/or cut wounds can occur if loose clothing, jewelry, necklaces, hair, or gloves are not kept away from the machine and its accessories.

Hazards during operation

• When using the machine, the operator‘s hands can be subject to hazards such as cuts, grazing, and heat. Wear suitable gloves to protect your hands.
• The operator and maintenance personnel must be physically capable of handling the size, mass, and power of the machine.
• Hold the machine correctly: be ready to counteract any normal or sudden movements – have both hands ready.
• Ensure that your body is balanced and that you have a secure standing position.
• Release the start/stop control in case of a disruption to the electricity supply.
• Use only lubricants recommended by the manufacturer.
• Suitable safety goggles must be worn; wearing of protective gloves and safety clothing is recommended.
• Check the grinding disc before every use. Do not use if this is cracked, broken or has been dropped.
• Avoid direct contact with the movable grinding disc to avoid squashing or cutting your hands or other parts of the body. Always wear suitable gloves to protect your hands.
• Never use the machine without an abrasive attachment.
• There is a risk of electrostatic discharge if the machine is used on plastic and other non-conductive materials.
• Dust and vapors created by the grinding and sanding can cause a potentially explosive atmosphere. Always use a dust extraction or suppression system suitable for the material being worked.

Risks due to repetitive movements

• When using a sander or polisher to perform work-related activities, operators may experience uncomfortable sensations in their hands and arms, as well as in the neck and shoulders or other parts of the body.
• When using a sander or polisher, the operator should adopt a comfortable posture whilst ensuring a secure hold and avoiding awkward postures or positions in which it is difficult to maintain balance. The operator should change positions during the course of long-lasting tasks. This can be helpful in the prevention of discomfort and fatigue.
• If the operator notices symptoms such as persistent or recurring illness, discomfort, throbbing, pain, tingling, burning or stiffness, these indications should not be ignored. In this case, the operator should consult a suitably qualified physician.

Hazards caused by accessories

• Disconnect the sander or polisher from the power before changing the tools or accessories.
• Use only accessories and supplies of the sizes and types recommended by the manufacturer of the sander or polisher.
• Cutting discs and machines for cutting may not be used.
• Avoid direct contact with the machine tool during and after use, since this can have heated up or have become sharp.
• The maximum operating speed recommended by the sander manufacturer must be equal to the rated speed given on the machine or higher.
• Self-adhesive grinding discs must be applied concentrically on the mounting plate.

Hazards in the workplace

• Keep your working area clean and well-lit. Cluttered or dark areas invite accidents.
• Slipping, tripping up, and falling are the main causes of injuries at the workplace. Take note of surfaces that could have become slippery through the use of the machine, and also any tripping hazards caused by air or hydraulic hoses.
• Proceed with caution in unknown surroundings. Hidden hazards caused by power or other supply lines may be present.
• Do not work with the compressed air tool in areas subject to the risk of explosions, or in areas where flammable liquids, gases, or dust are located. Grinding work creates sparks that may ignite dust or fumes.
• Keep children and other unauthorized personnel at a safe distance when using compressed air tools. Distractions can cause you to lose control over the appliance.
• The grinder is not insulated against electrical power sources.
• Ensure that there are no electrical cables, gas pipes, etc., which can cause a hazard if damaged by the use of the tool.

Risks due to dust and vapors

• The dust and vapors produced by using the sander or polisher can be hazardous to health (e.g. cause cancer, birth defects, asthma, and/ or dermatitis); it is essential to carry out a risk assessment in respect of these risks and to implement corresponding regulatory mechanisms.
• The risk assessment should include all dust caused by the use of the machine and any existing dust that may be whirled up at the same time.
• The sander or polisher is to be operated and maintained in accordance with the recommendations contained in this manual to keep the release of dust and vapors to a minimum.
• The exhaust air should be routed so that the raising of dust in already dusty environments is kept to a minimum.
• If dust or vapors are created, the main priority must be to control these at the site of their release.
• All inserts or accessories of the machine intended for collecting, extracting, or suppressing airborne dust or vapors or should be used and serviced in accordance with the manufacturer’s instructions.
• Consumables/machine tools should be selected, maintained, and replaced in accordance with the recommendations in this guide in order to avoid unnecessary intensification of dust or vapor production.
• Use breathing equipment as per the instructions provided by your employer or as required by health and safety regulations.

Risks due to noise

• Excessive noise levels in conjunction with insufficient hearing protection may lead to permanent hearing damage, hearing loss, and other problems, such as tinnitus (ringing, buzzing, whistling, or humming in your ears). Therefore it is essential that a risk assessment is carried out with respect to these risks and that appropriate regulatory mechanisms are implemented.
• Suitable regulatory mechanisms include measures such as the use of insulation materials to avoid pinging occurring on the workpieces.
• Use ear protection equipment as per the instructions provided by your employer or as required by health and safety regulations.
• The sander or polisher is to be operated and maintained in accordance with the recommendations contained in this manual to reduce any unnecessary increase in the noise levels.
• Consumables/machine tools should be selected, maintained, and replaced in accordance with the recommendations in this guide in order to avoid unnecessary increases of the noise levels.
• If the sander or polisher is equipped with a silencer, always ensure that this in its place and is operational while the machine is in operation. functions to the blood circulation in the hands and arms.
• When working in a cold environment, wear warm clothing and keep your hands warm and dry.
• If you notice numbness, tingling or pain in your fingers or hands or notice that the skin of your fingers or hands has become pale, stop working with the sander or polisher and consult a doctor.
• The sander or polisher is to be operated and maintained in accordance with the recommendations contained in this manual to reduce any unnecessary increase of the vibrations.
• Hold the machine securely but not too firmly while maintaining the necessary hand-reaction force, as the vibration risk generally increases the harder the machine is held.

Additional safety instructions for pneumatic machines

• Compressed air can cause serious injury. Ensure that the air supply is switched off, the hose is not under pressure, and that the machine is disconnected from the air supply when not in us, and also before exchanging accessories or carrying out repairs. Never aim the airflow towards yourself or any other person.
• Thrashing hoses can cause serious injury. Therefore, always check that the hoses and their fixings are not damaged or have not come loose. If universal rotary joints (claw couplings) are used, locking pins must be used to provide protection; Whipchek air hose restraints must be used to provide protection in case of a failure of the connection of the hose to the machine.
• Ensure that the maximum permissible pressure stated on the machine is not exceeded.
• Never carry compressed-air-powered machines by the hose.

Special safety instructions

• Always wear eye protection when using or maintaining the sander.
• Always wear suitable protective clothing. Protect your hands, hair, and clothes from being drawn in by rotating parts.
• Always wear a dust mask in situations in which large amounts of dust are being generated.
• Always wear hearing protection.
• Always wear protective gloves.
• Only connect the sander to the compressed air network when it is switched off.
• Sparks are created during grinding. Ensure that nobody can be endangered by flying sparks. You should also remove any flammable materials or objects.
• Do not carry the grinder if it has been connected to the compressed air hose.
• Be aware of the danger caused by a flailing compressed air hose!
• The grinder is not approved for use with cutting discs!
• The flow pressure of 6.3 bar may not be exceeded during operation.
• Never use oxygen or other flammable gases as an energy source.
• Switch the appliance on before applying it to the workpiece. After completing the task, lift the appliance from the workpiece and then switch it off.
• Once you have completed your work, switch the grinder off and place it down securely once it has come to a standstill. Caution! Grinder continues to run.
• Once you have completed your work, disconnect the grinder from the compressed air supply.
• Be aware that when processing certain materials there is a danger that dust and vapors can arise that could create an explosive atmosphere. Use vacuum cleaners and suitable protective equipment.

Before initial operation

• The grinder may only be operated on cleaned, oil atomized compressed air and may not exceed the maximum operating pressure of 6.3 bar at the appliance. The compressor must be fitted with a pressure reducer to regulate the working pressure.

Fitting the connector nipple

• Remove the plastic protective cap from the appliance’s air inlet.
• Wrap the threads on the connector nipple (5) with Teflon tape.
• Screw the connector nipple (5) into the air inlet.

Fitting the grinding disc
The compressed air-powered random orbital sander is equipped with a protective cuff (10) .

• To fit or replace the grinding disc (9) invert the protective cuff (10) (see Fig. 1).

WARNING!

• Never operate the compressed air-powered random orbital sander without the protective cuff (10).
• Never operate the compressed air-powered random orbital sander with an inverted protective cuff (10).
• A damaged protective cuff (10) should be replaced immediately.
• Turn the spindle lock (7) with the knurled bulge towards the flat side of the eccentric spindle (8) (see Fig. 2).
• Remove the protective cap (9) from the threaded rod of the grinding disc and screw it clockwise into the eccentric spindle as (8) far as the stop.
• Undo the spindle lock (7) so that the eccentric spindle (8) can turn freely on its own axis.
• CAUTION! Never operate the compressed air-powered random orbital sander with a locked drive spindle. This is dangerous and can result in serious injuries.

Selecting a sandpaper disc
Erosion and surface:
The material removal rate and surface quality are determined by the grain strength of the sandpaper.

• Please note that you can use sandpapers with various grain sizes for working the different materials.

Fitting the sandpaper disc
CAUTION! Ensure that the appliance is disconnected from the compressed air source before you fit or remove a sandpaper disc (11).

• The grinding disc (9) and the supplied sandpaper discs (11) are equipped with matching Velcro fasteners.
• Select the sandpaper disc (11) with the desired grain and press it onto the grinding disc (9). Ensure that it is centered.
• To change the sandpaper disc (11), lift it from the side and pull it off the grinding disc (9) . Clean the grinding disc (9) as required with compressed air.

Lubrication

NOTE: To avoid friction and corrosion damage, regular lubrication is particularly important. We recommend

using a suitable special oil for compressed air appliances

• Lubrication with mist oiler: A mist oiler (not supplied) continuously and optimally lubricates the appliance as a preparation stage after the pressure reducer. A mist oiler gives off fine drops of oil into the airflow and thus guarantees regular lubrication.
• Manual lubrication: If you do not have a mist oiler, lubricate the appliance before every use or longer work session by dripping 3–4 drops of special oil for compressed air appliances into the connector nipple (5).

Refilling oil
To ensure that the compressed air-powered random orbital sander remains operational for as long as possible, make sure that there is sufficient pneumatic oil in the appliance.

The following options are available:

• Attach a maintenance unit with an oiler to the compressor.
• Install a fitted oiler into the compressed air line or the compressor.
• Add 3–5 drops of pneumatic oil into the connector nipple (5) every 15 minutes of operation.

Connecting to a compressed air source
Before connecting the compressed air source

• the correct working pressure (3–6 bar) must be fully reached
• make sure that the trigger is in the upper position
• Attach the appliance to a compressor by connecting the connector nipple (5) with the supply hose of the compressed air source.
• To ensure that you can regulate the air pressure, the compressed air source must be equipped with a pressure reducer.

Handling

Switching on and off Switching on:

• First press the locking mechanism forwards and
• then trigger (3) to switch the appliance on. Switching off:
• Let go of the trigger (3).
• When you have finished working, disconnect the appliance from the compressed air source.

Regulation of vibration output

• Use the speed controller (6) to control the airflow and thus the vibration output (also during operation).
• The ideal speed depends on the material being worked and can be determined through practical tests.
  Use the pressure reducer to set the correct working pressure. Operate the appliance at a working pressure of 6.3 bar.

Sanding

• Switch on the compressed air source and allow it to run until the maximum tank pressure has been reached.
• Use the pressure reducer on the compressed air source to set the optimum working pressure. Note that the maximum working pressure may not be ex- needed. An excessive working pressure does not mean increased output; it merely increases the air consumption and accelerates appliance wear. Always comply with the technical information.
• Switch on the compressed air-powered random orbital sander.
• Allow the device to reach the required speed and adjust as necessary.
• Guide the compressed air-powered random orbital sander parallel onto the workpiece.
• Move the appliance parallel and in flat circles or alternatively lengthwise and across the surface. Use the housing (1) as a handle to guide the appliance in the desired direction.
• Do not press the compressed air-powered random orbital sander down. Pressing down hard does not increase the working efficiency!
• When you have finished working, let go of trigger (3) to switch off the appliance.
• When you have finished working, disconnect the appliance from the compressed air source.

CAUTION!

• Sanding creates dust. Always wear protective gloves, and a suitable mask and clean the sandpaper and workpiece at regular intervals with a vacuum cleaner or compressed air.
• Suitable safety precautions must be taken depending on the size and nature of the workpiece. Use suitable clamping devices to prevent the workpiece from slipping.
• In the event of an interruption to the air supply, release trigger (3) immediately.

Optimal working procedures

The most important thing to remember when sanding is to use successively finer-grained paper. With a coarse grain, the surface will not become smooth, but rather rougher. If the grain is too fine, you will hardly achieve any noticeable result. The material removal rate is determined by the speed and grain size of the sandpaper. The sandpaper used should be appropriate to the substance being worked and the amount of material to be removed.
CAUTION! Ensure that the appliance is disconnected from the compressed air source before you fit or remove a sandpaper disc (11).

Maintenance and cleaning

WARNING! RISK OF INJURY! Disconnect the appliance from the compressed air supply.
CAUTION! Before maintenance, clean off any hazardous substances that may (due to working processes) have accumulated on the appliance. Avoid all skin contact with these substances. If the skin comes into contact with hazardous dust, this can lead to severe dermatitis. If dust is produced or swirled up during maintenance, it can be inhaled.
NOTE! To ensure the correct functioning and long-term durability of the sander, pay attention to the following points:

• Sufficient and continuously intact oil lubrication is highly important for optimum functioning.
• Check the speed and vibration levels after each use.
• Check the idle speed regularly and after any maintenance is performed: use a rev counter and perform the measurement without any clamped tools. The idle speed may not be exceeded under any circumstances at a residual pressure of 6.3 bar.
• If the appliance is exhibiting excessive vibration levels, the cause of the vibrations must be identified and repaired.
• Use only the genuine replacement parts recommended by the manufacturer, otherwise, you could put users in danger. In doubt, contact the Service Centre.
• Check the grinding disc (9) regularly for damage.
• Clean the appliance with a soft, dry cloth only.
• Never use sharp or scratchy cleaning agents under any circumstances.

Disposal and recycling
The equipment is supplied in packaging to prevent it from being damaged in transit. The raw materials in this packaging can be reused or recycled. The equipment and its accessories are made of various types of material, such as metal and plastic. Defective components must be disposed of as special waste. Ask your dealer or your local council.

Troubleshooting

Lubricate appliance as described in the instructions.
If necessary, repeat the steps outlined above.
The appliance does not move; compressed air escapes completely through the outlet.| The motor is jammed due to material build-up.| Lubricate appliance as described in the instructions.

hereby declares the following conformity under the EU Directive and standards for the following article

Warranty

Apparent defects must be notified within 8 days from the receipt of the goods. Otherwise, the buyerís rights of claim due to such defects are invalidated. We guarantee for our machines in case of proper treatment for the time of the statutory warranty period from delivery in such a way that we replace any machine part free of charge which provably becomes unusable due to faulty material or defects of fabrication within such period of time. With respect to parts not manufactured by us we only warrant insofar as we are entitled to warranty claims against the upstream suppliers. The costs for the installation of the new parts shall be borne by the buyer. The cancellation of the sale or the reduction of the purchase price as well as any other claims for damages shall be excluded.

scheppach Fabrikation von Holzbearbeitungsmaschinen GmbH | Günzburger Str. 69 |
D-89335 Ichenhausen | www.scheppach.com

 www.scheppach.com
service@scheppach.com
  +(49)-08223-4002-99
+(49)-08223-4002-58

References

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