Switching On And Off; Preselecting The Belt Speed - Wurth Master HBS 533 Traducción Del Manual Original

OBJ_BUCH-1105-001.book Page 12 Tuesday, December 8, 2009 11:03 AM
Changing the Sanding Belt (see figure A)
❏ Before any work on the machine itself,
pull the mains plug.
• Completely pivot out the clamping lever 3. The
sanding belt 2 is now loose and can be removed.
• Mount the new sanding belt 2. Pay attention that
the direction of the arrows on the inside of the
sanding belt correspond with the arrow direction
on the machine housing.
• Pivot the clamping lever 3 back to its initial posi-
tion.
• Pick up the power tool and switch it on. Adjust the
belt run with adjustment knob 9 until the edge of
the sanding belt runs flush with the guide plate
14.
Pay attention that the sanding belt 2 does not move
excessively and make contact with the housing.
Check the belt run regularly and readjust with the
adjusment knob 9.
Selecting the Sanding Belt
Depending on the material to be worked and the
required rate of removal, different sanding belts are
available:
For coarse-sanding, e. g.
of rough, unplaned beams
and boards
For face sanding and
planing small irregularities medium 80, 100, 120
For finish and fine sanding
of hard woods
Dust/Chip Extraction
Dusts from materials such as lead-containing coat-
ings, some wood types, minerals and metal can be
harmful to one's health. Touching or breathing-in
the dusts can cause allergic reactions and/or lead to
respiratory infections of the user or bystanders.
Certain dusts, such as oak or beech dust, are con-
sidered as carcinogenic, especially in connection
with wood-treatment additives (chromate, wood pre-
servative). Materials containing asbestos may only
be worked by specialists.
• Use dust extraction whenever possible.
• Provide for good ventilation of the working place.
• It is recommended to wear a P2 filter-class respi-
rator.
Observe the relevant regulations in your country for
the materials to be worked.
12–English
Integrated Dust Extraction with Dust
Bag
For small sanding jobs, a dust bag 7 (accessory) can
be connected. Attach the sleeve of the dust bag
firmly onto the outlet piece 10. To maintain optimum
dust collection, empty the dust bag 7 in good time.
❏ Observe correct mains voltage! The volt-

Switching On and Off

To start the machine, press the On/Off switch 5
and keep it pressed.
To lock the pressed On/Off switch 5, press the
lock-on button 6.
To switch off the machine, release the On/Off
switch 5 or when it is locked with the lock-on button
6, briefly press the On/Off switch 5 and then release
it.

Preselecting the Belt Speed

Grain size
The necessary belt speed can be preselected with the
thumbwheel 4, even during operation.
The required belt speed depends on the material
coarse 40, 60
being sanded and on the working conditions, and
can be determined by practical testing.
fine 180, 240
The sanding removal rate and the surface quality
are mainly determined by the selection of the sand-
ing belt as well as by the preselected belt speed. The
higher the belt speed, the more material is removed
and the finer the sanded surface.
Only flawless sanding belts achieve good sanding
capacity and make the machine last longer.
Work using the least possible sanding pressure in
order to increase the service life of the sanding belts.
The machine's own weight is sufficient for a good
sanding performance. An excessive increase of the
sanding pressure does not lead to an increase of the
sanding capacity, but to increased wear of the
machine and the sanding belt.
Apply the machine to the workpiece only when
switched on. Work with moderate feed and carry out
the sanding with parallel and overlapping strokes.
Sand in the direction of the grain; sanding across the
grain produces an uneven sanding effect.
Starting Operation
age of the power source must agree with
the voltage specified on the nameplate of
the machine. Power tools marked with
230 V can also be operated with 220 V.
Working Advice
8.12.09