Functional Description; Operation - Makita JS3201 Betriebsanleitung

FUNCTIONAL DESCRIPTION

CAUTION:
• Always be sure that the tool is switched off and
unplugged before adjusting or checking function on the
tool.
Switch action (Fig. 1)
CAUTION:
• Before plugging in the tool, always check to see that
the switch trigger actuates properly and returns to the
"OFF" position when released.
• Switch can be locked in "ON" position for ease of oper-
ator comfort during extended use. Apply caution when
locking tool in "ON" position and maintain firm grasp on
tool.
To start the tool, simply pull the switch trigger. Release
the switch trigger to stop.
For continuous operation, pull the switch trigger and then
push in the lock button.
To stop the tool from the locked position, pull the switch
trigger fully, then release it.
Permissible shearing thickness (Fig. 2)
The groove on the yoke serves as a thickness gauge for
shearing mild or stainless steel plate. If the material fits
within the groove, it is shearable.
The thickness of materials to be sheared depends upon
the type (strength) of the material. The maximum shear-
ing thickness is indicated in the table below in terms of
various materials. Attempting to shear materials thicker
than indicated will result in tool breakdown and/or possi-
ble injury. Keep within the thickness shown in the table.
Max. cutting capacities
Steel up to 400 N/mm
Steel up to 600 N/mm
Steel up to 800 N/mm
Aluminum up to 200 N/mm
006426
ASSEMBLY
CAUTION:
• Always be sure that the tool is switched off and
unplugged before carrying out any work on the tool.
Blade inspection
Before using the tool, check the blades for wear. Dull,
worn blades will result in poor shearing action, and the
service life of the tool will be shortened.
The service life of the blades varies in terms of the mate-
rials to be cut and the fixed blade clearance.
Roughly speaking, a blade can cut about 500 m of
3.2 mm mild steel with one cutting edge (total 2,000 m
with four cutting edges).
Rotating or replacing blades (Fig. 3, 4, 5, 6 & 7)
Both the upper and lower blades have four cutting edges
on each side (the front and back). When the cutting edge
becomes dull, rotate both the upper and the lower blades
90° to expose new cutting edges.
When all eight edges are dull on both the upper and
lower blades, replace both blades with new ones. Each
time blades are rotated or replaced, proceed as follows.
mm ga.
2
3.2 10
2
2.5 13
2
1.5 17
2
4.0 9
Remove the blade securing bolts with the hex wrench
provided and then rotate or replace the blades.
Install the upper blade and tighten the upper blade secur-
ing bolt with the hex wrench. Press up on the upper
blade while tightening it.
After securing the upper blade, be sure that there is no
gap left between the upper blade and the beveled sur-
face of the blade holder.
Then install the lower blade like the upper blade while
adjusting the clearance between the upper blade and
lower blades. When performing this adjustment, the
upper blade should be in the lowered position.
First, semi- tighten the lower blade securing bolt, then
insert the thickness gauge for the desired clearance.
The cutting thickness is indicated on the thickness gauge
so the combinations shown in the table below should be
used. Work the lower blade positioning bolt on the yoke
until the clearance is such that the thickness gauge
moves only with some difficulty. Then firmly tighten the
lower blade securing bolt. Finally, tighten the hex nut to
secure the lower blade positioning bolt.
Thickness gauge combinations
Material thick- 2.3 mm
ness (14 ga.)
Thickness gauge
1.0 + 1.5
combinations
006427

OPERATION

CAUTION:
• When cutting, always place the shear on the workpiece
so that the material cut away is positioned on the right
side to the operator.
• Hold the tool firmly with one hand on the main handle
when performing the tool.
Holding material (Fig. 8)
The materials for cutting should be fastened to the work-
bench by means of workholders.
Shearing method (Fig. 9)
For smooth cuts, tip the tool slightly backward while
advancing it.
Maximum cutting width (Fig. 10)
Stay within the specified maximum cutting width (A):
Case of length 1,800 mm.
Mild steel (thickness)
Max. cutting width (A)
Stainless (thickness)
Max. cutting width (A)
006432
Minimum cutting radius
Minimum cutting radius is 50 mm when cutting 2.3 mm
mild steel.
2.5 mm 3.2 mm
(13 ga.) (10 ga.)
1.0 + 1.5 1.5 + 2.0
3.2 mm Under 2.3 mm
90 mm No limit
2.5 mm Under 2.0 mm
70 mm No limit
5