Chuck Replacement - wurth BM 13-XE Instructions Manual

BM_SB 13-XE.book Seite 13 Montag, 12. April 2010 3:27 15
After long periods at low operating speed, run the
machine at high speed and without load for approx.
3 minutes.
Changing rotational direction
Move the lever to the required symbol:
Forward rotation
Reverse rotation
Due to a lockout mechanism, the reversing lever can
only be switched when the On-/off switch is not
depressed.
Only change direction of rotation when the
machine has stopped.
Gear Selector Switch
Two speed ranges can be pre-selected with the gear
selector switch 10:
1st gear:
Low speed range
2nd gear:
High speed range
The setting can be changed with the machine run-
ning, however, not under full load.
Mode Selection Drilling, Impact Drilling
(SB 13-XE)
For drilling, push selector switch 3 left-
ward to the stop.
For impact drilling push the selector
switch 3 to the right.
The selector switch 3 engages noticeably and can be
actuated with the machine running. Carbide tipped
drill bits are required for drilling jobs in concrete,
masonry and brickwall.

Chuck Replacement

Removing securing screw (Figure A)
The chuck is secured against being loosened from
the spindle with securing screw 14.
The chuck must be opened completely for removal of
screw which has left hand thread with securing
screw 14 being removed completely.
Securing screw is reverse-threaded.
If the securing screw is frozen, apply screwdriver to
head of screw and loosen screw by hitting the scre-
wdriver handle.
Unscrewing chuck (Figure B)
Normally the drill chuck can be unscrewed by hand.
Should the drill chuck be seated very tight on the drill
spindle, attach two open-end spanners 16 to the
spanner flats of the drill chuck head or clamp an
Allen key 15 into the drill chuck.
If necessary, hit the key shaft lightly with a plastic
hammer.
Mount the chuck in reverse order.
Advices for Operation
Sharpening drill bits
Only HSS drill bits in perfect condition (HSS = high
speed steel) should be used for drilling metal. The
appropriate quality is guaranteed by Würth Acces-
sories Programme.
Dust Extraction
Dusts from materials such as lead-containing coa-
tings, some wood types, minerals and metal can
be harmful to one's health. Touching or brea-
thing-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
preservative). Materials containing asbestos may
only be worked by specialists.
- Provide for good ventilation of the working place.
- It is recommended to wear a P2 filter-class respira-
tor.
Observe the relevant regulations in your country
for the materials to be worked.
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