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7.7B CHANNEL SHEAR OPERATION
The Channel Shear will shear from 2 to 5 inch (50 to 150mm) lightweight (5.4 lb/ft) channel with
minimum distortion. Lubricate the blades before the first cut and every 10 to 15 cuts, thereafter.
Grease the slider block between the upper arm and the tool every two hours of operation.
THE FOLLOWING ARE BASIC STEPS IN SHEARING WITH THE CHANNEL SHEAR.
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ADJUST BOTH MOVING AND STATIONARY SIDE BLADES TO THE SIZE OF CHANNEL
BEING SHEARED.
Improper adjustment of the vertical blades will result in damage to the channel shear. To keep the
channel centered in the unit, it is necessary to reset the stationary side blades for each size of channel.
ONE METHOD OF ACCOMPLISHING THIS ADJUSTMENT IS AS FOLLOWS:
Place a piece of channel, the size to be sheared, in the tool. Remove the lifting springs and lower the
upper blade by hand until it contacts the channel iron. Locate the channel so that the upper blade
contacts both legs, which will center it in the shear. Adjust the movable vertical blades up to the flange
of the channel. Loosen the fixed vertical blade clamps (four places). Slide the fixed blades up to the
channel flange. Tighten the blade clamps and adjust the back-up socket set screws up against the fixed
vertical blades. Now, check to see that the blades have good alignment, front and back, and have
maintained their perpendicularity to the lower blades.
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POSITION THE ADJUSTING HANDLE.
The adjusting handle can be relocated to permit easy opening and closing of the movable vertical blades.
(Approximately 1/2 turn will lock and unlock the workpiece.)
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SET THE BOTTOM OF THE STROKE AS LOW AS POSSIBLE.
The bottom of the stroke should be set as low as possible, without bottoming any part of the upper blade,
blade holder or pressure block. The upper stroke should be set to allow the workpiece to feed through the
shear freely.
—
PROCEDURE FOR SHEARING:
Lubricate the blades with oil before making the first cut and every 10 to 15 cuts, thereafter. This
lubrication is critical on the channel shear.
Position the workpiece. Snug the movable blades up to the channel’s flange. Depress the foot switch and
shear the workpiece. Before releasing the foot switch, back the movable blades off by 1/2 turn of the
locking handle. Make sure that the slug drops from the chute after each stroke. All of the bottom and
vertical blades are symmetrical and can be turned to present four (4) cutting edges.
Clearance between the upper and lower blades is changed by the addition or removal of shims. A
clearance of twenty thousandths of an inch (.5mm) is recommended. For efficient shearing, blades must
be kept sharp.
REMOVE THE TOOL WHEN IT IS NOT IN USE.
Summary of Contents for IRONWORKER 6509-24M
Page 1: ...Page 1 MODEL 6509 24M IRONWORKER PRINTED MARCH 2005...
Page 9: ...Page 9 FIGURE 1...
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