DEXTER 350OS2.5 Rotary Sander Instruction Manual

June 3, 2024
DEXTER

DEXTER 350OS2.5 Rotary Sander

INTENDED USE OF ROTARY SANDER

This machine is intended for sanding on wood, painted surfaces, soft plastics and metals. Do not use machine attachments for works other than those for which they are designed for! All other applications are expressly ruled out.

SAFETY INSTRUCTIONS

GENERAL POWER TOOL SAFETY WARNINGS
WARNING! Read all safety warnings and all 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 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 offposition before connecting to power source and /or battery pack, picking up or carrying the tool. Carrying power tools with your finger on the switch or energising power tools that have the switch on invites accidents.
  • Remove any adjusting key or wrench before turning the power tool on. A wrench or a key left attached to a rotating part of the power tool may result in personal injury.
  • Do not overreach. Keep proper footing and balance at all times. This enables better control of the power tool in unexpected situations.
  • Dress properly. Do not wear loose clothing or jewellery. Keep your hair, clothing and gloves away from moving parts. Loose clothes, jewellery or long hair can be caught in moving parts.
  • If devices are provided for the connection of dust extraction and collection facilities, ensure these are connected and properly used. Use of dust collection can reduce dust-related hazards.
  • Do not let familiarity gained from frequent use of tools allow you to become complacent and ignore tool safety principles. A careless action can cause severe injury within a fraction of a second.

POWER TOOL USE AND CARE

  • Do not force the power tool. Use the correct power tool for your application. The correct power tool will do the job better and safer at the rate for which it was designed.
  • Do not use the power tool if the switch does not turn it on and off. Any power tool that cannot be controlled with the switch is dangerous and must be repaired.
  • Disconnect the plug from the power source and/or the battery pack 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 qualified repair person using only identical replacement parts. This will ensure that the safety of the power tool is maintained.

SANDER SAFETY WARNINGS

WARNING: Contact with or inhalation of harmful/toxic dusts arising from sanding painted surfaces, woods and metals can endanger the health of operator and bystanders. Take special care to guard against these dusts, including the following:

  • All persons entering the work area must wear an approved mask specially designed for protection against harmful / toxic dusts, in addition to using the dust extraction facility, and keeping work area well ventilated.

  • Children and pregnant women must not enter the work area.

  • Do not eat, drink or smoke in the work area. Any pre1960 building may have paint containing lead on wood or metal surfaces. If you suspect workpiece contains lead seek professional advice.

  • Some wood and wood type products especially MDF (Medium Density Fibreboard) can produce dust that can be hazardous to your health. We recommend the use of an approved face mask with replaceable filters when using this machine in addition to using the dust extraction facility.

  • When using the sander with metal be aware that sparks may ignite the dust in the dust extraction system or vacuum cleaner.

  • This sander is designed for both single-hand and double-hand operations. Adopt a stable stance and make sure that the mains cable is prevented from coming into contact with the machine or getting caught up on other objects preventing completion of the sanding pass.

  • Ensure that you have removed foreign objects such as nails and screws from the workpiece before commencing sanding.

  • Don’t use it for wet sanding, for dry sanding only.
    Where possible, secure smaller workpieces to prevent it from moving under the sander. Do not force the sander, let the tool do the work at a reasonable speed. Overloading will occur if too much pressure is applied and the motor slows resulting in inefficient sanding and possible damage to the sander motor.

  • Do not continue to use worn, torn or heavily clogged sanding paper.

  • Do not touch the moving sanding paper.

  • Always wear hearing protection

DESCRIPTION

  1. ON/OFF switch
  2. Dust extraction box
  3. Sanding base plate
  4. Folding handle
  5. Vacuum adaptator
  6. Adjustment knob
  7. Speed controller

TECHNICAL DATA

Type designation 350OS2.5 Rotary Sander
Rated voltage 220-240V~ 50Hz
Rated power input 350W
Rotational speed 0-13000/min
Base dia. Ø125mm
Level of acoustic pressure L pA 81.1 dB(A) (K pA

=3dB(A))
Level of acoustic power L wA| 92.1 dB(A) (K wA =3dB(A))

Level of vibration a h

| Level of main handle vibration|

13.23 m/s2 (K=1.5m/s2)

Level of auxiliary handle vibration|

18.67 m/s2 (K=1.5m/s2)

NOTE:

  • The declared vibration total value has been measured in accordance with a standard test method and may be used for comparing one tool with another;
  • The declared vibration total value may also be used in a preliminary assessment of exposure.

WARNING:

  • The vibration emission during actual use of the power tool can differ from the declared total value depending on the ways in which the tool is used;
  • Identify safety measures to protect the operator that are based on an estimation of exposure in the actual conditions of use (taking account of all parts of the operating cycle such as the times when the tool is switched off and when it is running idle in addition to the trigger time). Depending on the actual use of the product the vibration values can differ from the declared total! Adopt proper measures to protect yourself against vibration exposures! Take the whole work process including times the product is running under no load or switched off into consideration! Proper measures include among others regular maintenance and care of the product and application tools, keeping hands warm, periodical breaks and proper planning of work processes!

DETAILED VIEW

INSTALLATION

DEXTER 350OS2.5 Rotary Sander-3 DEXTER 350OS2.5
Rotary Sander-6 DEXTER 350OS2.5 Rotary
Sander-8 DEXTER 350OS2.5 Rotary Sander-9

BEFORE PUTTING THE EQUIPMENT INTO OPERATION

Mounting/changing the sandpaper
Always ensure that the machine is switched off and plug is removed from the power point before making any adjustment.

  1.  Select the required grade of sanding paper.
  2.  Remove any dust or debris from the hook and loop of the base.
  3.  To attach hook & loop type sanding paper simply align the holes in the sanding paper with the holes in the sanding base and press firmly into place.
  4.  To remove the sanding paper, peel it away from the base.

Mounting the dust extraction box
WARNING!
Always connect the dust extraction when sanding.

We recommend the use of the dust extraction facility at all times. Simply slide the dust extraction box onto the dust extraction port. Always keep the dust extraction holes in the sanding base free of obstructions.

Folding handle
The handle can be changed to the desired angle when using the product.

  1. Loosen the adjustment knob to loosen the handle.
  2. Adjust the handle to the desired working position so that you can hold the product safely during operation.
  3. Tighten the adjustment knob to tighten the handle.

OPERATION

Selecting the speed
With the speed controller, the rate of oscillation can be selected (also during operation). Rotate the speed controller to choose the suitable speed.
The optimum speed depends on the material and should be determined by carrying out a practical test.
Stage 1: slow Stage 6: quick

Switch on and off

  • Hold the tool firmly to control the twisting of the tool. To prolong the life of the tool never overload it.
  • Switch the sander on by push the mark on the on/off switch. To turn off the sander, push the mark.

Sanding
The sander can be used for most sanding operations on materials such as wood, plastic, metal and painted surfaces. Where possible, secure smaller workpiece to prevent them from moving under the sander. Lower the sander in contact with the workpiece without pressure and then start the sander. Move the sander slowly over the surface of the workpiece in a circular or curved motion with an even, moderate pressure.
If there are still scratches on your work after sanding, try either of the following:

  • Go back to a coarser grit and sand the marks out before recommencing with the original choice or,
  • Try using new sanding sheet of the same grit to eliminate the unwanted marks before progressing to a finer grit and finishing the job.

MAINTENANCE

Always disconnect the device before performing any adjustment or mainte-nance operation. If the supply cord is damaged, it must be replaced by the manufacturer or its service agent in order to avoid a hazard. Disconnect from the power supply immediately if the supply cord is damaged. Take care not to expose this tool to the rain.
If the carbon brushes need to be replaced, have this done by a qualified repair person (always replace the two brushes at the same time).

Cleaning
Avoid using solvents when cleaning plastic parts. Most plastic parts are susceptible to damage from various types of commercial solvents and may be damaged by their use. Use clean cloths to remove dirt, carbon dust, etc.

Lubrication
All the bearings in this tool are lubricated with a sufficient amount of high grade lubricant for the life of the unit under normal operating conditions, therefore no further lubrication is required.

TROUBLE SHOOTING

Suspected malfunctions are often due to causes that the users can fix themselves. Therefore check the product using this section. In most cases the problem can be solved quickly.

WARNING! Only perform the steps described within these instructions! All further inspection, maintenance and repair work must be performed by an authorised service centre or a similarly qualified specialist if you cannot solve the problem yourself!

Problem Possible cause Solution
Product does not start Not connected to power supply Connect

to power supply
Power cord or plug is defective| Check by a specialist electrician.
Other electrical defect to the product| Check by a specialist electrician
Product does not reach full power| Extension cord not suitable for operation with this product| Use a proper extension cord
Power source (e.g. generator) has too low voltage| Connect to another power source
Air vents are blocked| Clean the air vents
Unsatisfactory result| Sanding sheet is worn| Replace with a new one
Sanding sheet not suitable for work piece material| Use suitable sanding paper

PROTECT OUR ENVIRONMENT
Electrical products must not be thrown out with domestic waste. Recycle them at the special disposal centers provided for the purpose. Contact your local authorities or stockiest for advice on recycling.
The potential effects on the environment and human health as a result of the presence of hazardous substances in electrical and electronic equipment.
For disposal, this tool also can be returned to the hardware store or vendor (or Dexter Power dealer).

WARRANTY

  1. Dexter Power products are designed to highest DIY quality standards. Dexter Power provides a 36-months warranty for this rotary sander (model n°350OS2.5), from the date of purchase. This warranty applies to all material and manufacturing defects which may arise. No further claims are possible, of whatever nature, direct or indirect, relating to people and /or materials. Dexter Power products are not directed to professional use.
  2. In the event of a problem or defect, you should first always consult your  Dexter Power dealer. In most cases, the Dexter Power dealer will be able to solve the problem or correct the defect.
  3. Repairs or the replacement of parts will not extend the original warranty period.
  4. Defects which have arisen as a result of improper use or wear are not covered by the warranty. Amongst other things, this relates to switches, protective circuit switches and motors, in the event of wear.
  5. Your claim upon the warranty can only be processed if:
    • Proof of the purchase date can be provided in the form of a receipt.
    • No repairs and/or replacements have been carried out by third parties.
    • The tool has not been subjected to improper use (overloading of the machine or fitting non-approved accessories).
    • There is no damage caused by external influences or foreign bodies such as send or stones.
    • There is no damage caused by non-observance of the safety instructions and the instructions for use.
    • There is no force majeure on our part.
    • A description of the complaint is enclosed.
  6. The warranty stipulations apply in combination with our terms of sale and delivery.
  7. Fault tools to be returned to Dexter Power via Dexter Power dealer will be collected by Dexter Power as long as the product is properly packaged. If faulty goods are sent directly to Dexter Power by the consumer, Dexter Power will only be able to process these goods if the consumer pays the shipping costs.
  8. Products which are delivered in a poorly packaged condition will not be accepted by Dexter Power.

EC DECLARATION OF CONFORMITY

ADEO Services 135 rue Sadi Carnot CS 00001
59790 Ronchin – France
Declare that the product:

ROTARY SANDER 350W
Model: 350OS2.5 meets the requirements of the following directives, regulations and standards: Machinery Directive 2006/42/EC Electromagnetic Compatibility Directive 2014/30/EU RoHS Directive 2011/65/EU Amended by Directive (EU) 2015/863 and conforms with the norms:

  • EN 62841-1:2015; EN 62841-2-4:2014
  • EN IEC 55014-1: 2021; EN IEC 55014-2: 2021
  • EN IEC 61000-3-2:2019+A1:2021; EN 61000-3-3:2013+A1:2019
  • IEC 62321-1:2013; IEC 62321-2:2013
  • IEC 62321-3-1:2013; IEC 62321-4:2013+AMD1:2017 CSV
  • IEC 62321-5:2013; IEC 62321-6:2015
  • IEC 62321-7-1:2015; IEC 62321-7-2:2017
  • IEC 62321-8:2017; ISO 17075:2017
  • EN IEC 63000: 2018

Batch No.: Please refer to the back cover page Last two numbers of the year CE marking applied: 19

Imported by Adeo South Africa (PTY) LTD T/A Leroy Merlin
Leroy Merlin Greenstone Store – Corner Blackrock Street
and Stoneridge Drive, Greenstone Park Ext 2,
Edenvale, 1610 – Johannesburg, Gauteng, South Africa

References

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