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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
shearing 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
possible injury. Keep within the thickness shown in the
table.
Tensile Strength
Material
Mild steel (A)
Hard steel (B)
Stainless steel
Aluminum plate
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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.
Rotating or replacing blades
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.
3
5
4
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Remove the blade securing bolts with the hex wrench
provided and then rotate or replace the blades.
Some tools have one or more thin washers between the
upper blade and the blade holder. Be sure to use the
same number of thin washers when reassembling.
Max. cutting thickness
2
(N/mm
)
(mm)
400
1.6 (16 ga)
600
1.2 (18 ga)
800
0.8 (22 ga)
200
2.5 (13 ga)
1. Lower blade
2. Loosen
1
3. Upper blade
2
4. Upper blade
securing bolt
5. Hex wrench
2
3
4
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NOTE:
No thin washers are used for the lower blade.
•
Install the upper blade and tighten the upper blade
securing bolt with the hex wrench. Press up on the upper
blade while tightening it.
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After securing the upper blade, be sure that there is no
gap left between the upper blade and the beveled
surface of the blade holder.
1
2
3
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When installing the lower blade onto the yoke, the lower
blade should be pressed against the yoke so as to be
contacting the beveled portions A and B of the yoke and
the tip C of the lower blade positioning screw while you
tighten the lower blade securing bolt. There must be no
clearance between A, B and C during installation.
2
1
004686
5
1. Thin washers
2. Blade holder
1
3. Upper blade
4. Upper blade
securing bolt
1. Tighten
2. Upper blade
1
securing bolt
2
3. Upper blade
3
1. Blade holder
2. Upper blade
securing bolt
4
3. Upper blade
4. No gap allowed
1. Lower blade
2. Tighten
3. Yoke
3
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