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• It is advisable to do a trial run on a scrap piece of material to determine the optimum grades for
a particular job. If there are still marks on your work after sanding, try either going back to a
coarser grade and sanding the marks out before recommencing with the original choice of grit,
or try using a new sanding sleeve or wheel to eliminate the unwanted marks before going on to
a finer grit and finishing the job.
Fitting a Sanding Sleeve to the Sanding Sleeve Drum
1. Remove the existing worn out Sanding Sleeve (19) from the Sanding Sleeve Drum (18).
2. Visually check the new Sanding Sleeve for damage or tears.
3. Check to see if there is a rotation direction indicated on the inside of the Sanding Sleeve and
match it to the Direction Indicator (7) marked on the tool. If necessary, fit the Sanding Sleeve
Drum to the tool to make it easier to ensure the direction is the same. Most sanding sleeves will
not be rotational.
4. Slide the Sanding Sleeve over the Sanding Sleeve Drum.
5. Check the Sleeve is secure on the drum before use.
Fitting and removing a Sanding Drum or Flap Wheel
IMPORTANT: The rated speed of the accessory must be at least equal to the maximum speed
marked on the power tool. Accessories running faster than their rated speed can break and fly apart.
Note: DO NOT continue to use worn, torn or heavily clogged Sanding Sleeves of Flap Drums/
Wheels. Ensure foreign objects, such as nails and screws, are removed from the workpiece before
starting to sand.
IMPORTANT: DO NOT use a Sanding Sleeve or Flap Drum/Wheel on wood that has previously been
used on metal. This may cause scouring on the wooden surface.
Sanding Drum/Flap Wheel removal
1. While pressing the Spindle Lock (10) rotate the Wheel/Drum until the Spindle (8) locks and the
Wheel/Drum will not rotate.
2. Push down on the Wheel/Drum then rotate anti-clockwise to unlock and release. (Fig. I)
3. Remove Wheel/ Drum form Spindle.
Sanding Drum/Flap Wheel fitting
1. Press the Spindle Lock (10)
2. Fit the Wheel/Drum on to the Spindle (8).
3. Push the Wheel/Drum down, rotate clockwise and release. (Fig. I)
4. Pull slightly on the Wheel/Drum as a test to ensure it is correctly fitted
Note: Use of the Spindle Lock is not always required when removing or fitting wheels and drums.
Adjusting the Arm Angle
See Fig. II.
1. Loosen the Angle Lock Knob (2) by turning it anti-clockwise, until the arm can be moved up
and down.
2. Move the arm to the desired angle.
3. Tighten the Angle Lock Knob by turning it in a clockwise direction until hand tight.
Adjusting the Guard position
1. Position the Guard (1) over the Spindle (8) and align the arrow on the Guard Collar (16), with the
unlock icon on the Pressure Plate (15)
2. Push the Guard Collar onto the Pressure Plate
3. Rotate the guard to the required angle
Removing the Guard
1. Rotate the Guard (1) to align the arrow on the Guard Collar (16), with the unlock icon on the
Pressure Plate (15)
2. Gently pull the Guard off the Pressure Plate and over the Spindle (8)
Dust extraction
WARNING: It is recommended to connect the tool to a suitable vacuum cleaner or workshop
dust extraction system, especially if the sanding dust contains harmful substances, such as particles
from old paint, varnish, surface coatings etc. Always dispose of harmful dust according to laws and
regulations.
WARNING: Take special care to guard against harmful and toxic dusts when sanding lead-based
painted surfaces, woods and metals, particularly if you are unsure about the exact substances
involved. All persons entering the work area must wear a mask specially designed for protection
against the toxic dust and fumes involved. Children and pregnant women MUST NOT enter the work
area. DO NOT eat, drink or smoke in the work area.
• This tool is designed to be connected to a household vacuum cleaner hose or workshop dust
extraction system. This is the preferred and most effective method of dust extraction
1. Install the Dust Port Adaptor (21) on to the Dust Port (11). (Fig. III)
2. Attach a suitable vacuum hose to the Dust Port Adaptor
3. Switch the extraction device 'ON' before switching the tool 'ON' .
4. When finished working with the tool, switch the tool 'OFF' first, then the extraction system.
WARNING: Using the tool without vacuum suitable dust extraction may expose the operator
to harmful dust, and may lead to a build-up of dust on internal components, shortening the tool's
service life. Such damage is not covered by warranty.
Operation
WARNING: This sander must NOT be used for wet sanding.
WARNING: Always use adequate protective equipment, including eye protection, respiratory and
hearing protection, when working with this tool.
WARNING: DO NOT touch the sanding accessories whilst the tool is switched 'ON' or in motion.
WARNING: Position the cord clear of any moveable parts of the tool. If you lose control, the cord
may be cut or snagged and your hand or arm may be pulled into the rotating parts on the tool.
Note: ALWAYS use clamps to secure your workpiece to the workbench wherever possible.
IMPORTANT: Regularly clean the tool's Motor Vents (3). The motor's fan will draw the dust inside the
housing and excessive accumulation of powdered metal or wood dust may cause electrical hazards.
Switching ON & OFF
WARNING: DO NOT switch the tool 'ON' or 'OFF' whilst under load, as this will greatly decrease
the service life of the ON/OFF Switch (5).
1. Connect the plug to the power supply
2. Hold the tool securely with both hands, one on the Main Handle (6) and one on the main body of
the tool to provide full control while operating.
3. Ensure the tool is not in contact with the workpiece before switching 'ON' .
4. Toggle the ON/OFF Switch (5) to the 'I' position, to switch the tool 'ON' .
5. Toggle the ON/OFF Switch into the '0' position, to switch the tool 'OFF.
WARNING: Lift the tool off the workpiece before switching 'OFF' .
WARNING: Always wait until the tool has stopped completely before putting it down. Always
disconnect from the power supply after use.
Adjusting the speed
• The speed of this tool can be adjusted using the Variable Speed Dial (4)
1. Turn the Variable Speed Dial to a higher setting, to increase speed.
2. Turn the Variable Speed Dial to a lower setting, to decrease speed.
Note: Adjust speed to best suit the work carried out, and to adapt to material requirements.
Also refer to the Sanding Sleeve or Flap Wheel manufacturer's instructions, with regards to
speed selection.
Sanding
• The Detail Flap Wheel (17) with its narrow sanding surface is ideal for intricate sanding in places
that are difficult to access.
• The Flap Wheel (20) is ideal for shaped or contoured surfaces.
• The Sanding Sleeve (19) is ideal for flat surfaces or very lightly shaped surfaces. It has no ability
to shape to the material being sanded.
• Move the tool over the surface of the workpiece, applying an even, moderate pressure until you
reach the desired surface finish.
WARNING: Excessive pressure does not lead to a faster removal of material; it will, however, lead
to premature wear of the Sanding Sleeve or Flap Wheel, and may cause damage to the tool.
• Both sanding performance and quality depend mainly on the choice of the correct Sanding
Sleeve or Flap Wheel.
• Scratches on the workpiece after sanding can indicate a worn or damaged sanding accessory, or
the wrong grit of sanding accessory. Refer to the 'Selecting the correct sanding grit' section of
this manual.
Accessories
• A full range of accessories including sanding drums, sleeves and wheels, is available from your
Silverline stockist.
• Spare parts can be obtained from toolsparesonline.com.
silverlinetools.com
420W Drum Sander
9
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