KRESS ST 420 E Instrucciones De Servicio página 7

It can then be taken out of the tappet.
The supporting roller, which prevents the saw blade from
warping and alleviates the stress placed on the mechanics
(tappet), automatically gives the clamping angle 90° as a
fence. This of course only applies when our original saw
blades are used.
Switching the machine on and off
Caution!
Before switching on the sabre jig saw, the dust cover (3) in
front of the tappet must be lowered again to the saw
bench (4).
To switch on the device, slide the circuit closer/breaker (1)
to the front. Pressing the swung-out front edge of the cir-
cuit closer/breaker (1) will move it back to the Off position.
Working with pendulum jigsaws
When sawing, ensure that the base plate is securely posi-
tioned on the work piece. The jigsaw can now be easily
operated by hand. To achieve clean cuts and optimal cut-
ting performance, ensure that the pendulum stroke setting
and forward feed selected are appropriate to the material
(e. g. slowar feed when sawing metal).
The built-in blower keeps the cut continuously free of shav-
ings for perfect visibility.
When sawing metals, put some oil onto the cutting line.
Sheet metal is to be clamped to a suitably solid base (clam-
ping plate or plywood plate). This eliminates as far
as possible the risk of the material springing back and forth.
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Cutouts/pocket cuts
For cutouts, drill a hole i.e. a starting point where the saw
can be inserted. Plunge cuts can be made into the material
(only when working wood), but should only be attempted
by skilled people. The switched-on jigsaw is placed on the
work piece at an angle of 55–60° to the front edge of the
base plate and pushed down slowly and carefully. Particu-
lar care is required at the start of this work; kick-backs and
jerks will result if the jigsaw is placed the wrong way, whilst
excessively fast plunge cuts may result in broken blades.
Only perform plunge cuts at the max. number of strokes.
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Mitre cuts
The base plate can be adjusted in both directions by 22.5°
and 45°. 0°, 22.5° and 45° angles can be fixed securely.
Adjustments are made by loosening the clamping wheel (6)
beneath the handle. As soon as the toothed wheel work of
the saw bench mounting is released, the base plate (4) can
be turned to positions 22.5° or 45° and be tightened again
with the clamping wheel (6).
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Full-wave control electronics
The electronic pendulum jigsaw is equipped with control
electronics which can be switched off. The stroke rate can
be continuously adopted within a range from 500-2700
strokes per minute to the respective material requirements.
Adjustment is by means of an electronic-adjusting wheel
(2) in the housing. This is possible at any time during ope-
ration. The electronics are switched off by turning the ad-
justing wheel to the max. position. The jigsaw then operates
at the max. idle running stroke rate of 3600 strokes/min.
Important!
The motor can become overheated with longterm
heaving loading and low rev.s.
Chip-flyoff guard
The synthetic part is placed into the saw opening of the
base plate from below (snap fastening). The wood fibre
structure is thereby pressed during sawing against this
chip-flyoff guard, thus preventing the wood fibres from
being damaged.
This application can only be used when cutting at
a right angle (90°).
Dust extractor
The jigsaw is equipped to be connected to a commerically
available vacuum cleaner. In order to keep the cut free of
shavings, the flexible suction tube is inserted from the back
into the housing opening. The dust hood is to be pushed
downwards until it locks into place. In the case of mitre
cuts, the dust hood is to be pushed upwards.
Changing the carbon brushes
Our service centres will do this and all other servicing work
quickly and professionally.
Mains cable
Damaged mains cables must not be used. They are to be
replaced immediately.
Maintenance
All tools are contaminated by dust when working with
wood. Proper care is therefore essential. Always keep the
openings free of dust and dirt. The movable supporting
roller for the saw blade should be given a drop of oil from
time to time. Other than this, the jigsaw is virtually mainte-
nance-free. Before leaving the factory, all moving parts are
well lubricated.
Noise/vibration information
Measured values determined according to EN 60 745.
Typically the A-weighted noise levels of the machine are:
sound pressure level 85 dB (A); sound power level 96 dB
(A). Measurement uncertainty K = 3 dB.
Wear hearing protection!
The typically weighted acceleration is 6,6 m/s
Environmental protection
Do not dispose of electric tools together with
household waste material!
Recycle raw materials instead of disposing as
waste
The machine, accessories and packaging should be sorted
for environmental-friendly recycling.
These instructions are printed on recycled paper manufac-
tured without chlorine.
The plastic components are labelled for categorised recyc-
ling.
Subject to change without notice.
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