Operation Manual

4
ENGLISH
ST 400, ST 440, STEP 420, STEP 450, SPE 70, SPE 80 A
The stroke-rate (= movements per minute
of the saw blade) can be infinitely varied
by means of the adjustment wheel.
The letters A to G are printed on the speed
control, meaning:
A = lowest stroke rate
G = highest stroke rate
The stroke rate appropriate to the material
being worked on can be taken from the
following table, and the corresponding
letter shown on the setting wheel.
Material Stroke rate
Wood G
Steel D-E
Aluminium D-E
Rubber A-C
By adjusting the pendulum action the cutting depth of the saw blade teeth is
increased or decreased. As a rule of thumb:
Soft material Large pendulum stroke
Hard material Small or no pendulum stroke
Clean cut surface No pendulum stroke
The appropriate degree of pendulum effect can be taken from the following chart
and compared with the marking at the pendulum stroke lever.
Material Degree of swing action
Wood I - III
Plastic I
Aluminium 0 - I
Steel 0
Ceramics 0
Rubber 0
The stroke rate shown in the chart is only
a suggestion for your general guidance!
The stroke rate can be set on the stroke
rate control even while the motor is
running.
Only operate the machine with suitable
sawdust removal.
The integrated suction channel has the
standardized internal diameter of 30 mm.
Use the suction hose (Id. No.
4932 3304 12) from our range of
accessories to connect it to a household
vacuum cleaner or to an wet-and-dry
vacuum cleaner.
1. Push in and turn the suction hose into the
suction channel until it fits firmly.
2. Push the transparent cover downwards to
ensure optimum sawdust removal.
Adjusting the
stroke rate
(only applicable
for
STEP 420
STEP 450
SPE 70
SPE 80 A)
Adjusting the
pendulum stroke
(only applicable
for
STEP 420
STEP 450
SPE 70
SPE 80 A)
Sawdust removal
B
A
15
0
III
II
I
0
15
0
III
II
I
0