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7.3C BLADE REPLACEMENT
The lower blades of the 6 x 6 ninety degree notcher are symmetrical.
They can be rotated to expose (4) cutting edges.
The upper blade has (2) cutting edges.
To rotate or replace the blades, use the following steps:
►
CAUTION: THE UPPER CASTING OF THE NOTCHER IS HEAVY ENOUGH TO CAUSE
INJURY IF DROPPED. USE CARE WHEN HANDLING THIS TOOL.
1.
Remove the return springs from the unit.
2.
Rotate or replace the upper blade and snug bolts only, to allow further adjustments.
3.
Rotate or replace the lower blades.
4.
Lower the upper blade down until it just passes the lower blade (approximately 1/16 of an inch
(1.5mm).
5.
Adjust the upper blade until the point almost touches the lower blades.
6.
Center the rear of the upper blade with the rear of the lower blades. There should be a clearance
of approximately .005 of an inch (.12mm) on each side.
7.
Tighten the upper blade bolts. Raise and lower the upper casting several times by hand, to check
blade alignment. After alignment, tighten the back-up set screws to make sure that the upper
blade does not move.
7.4 12 & 24 INCH BRAKES
Brakes are component tools designed to bend and form mild steel. They are shipped with standard dies to
accommodate material up to 1/4 inch (6mm) thickness. The PUNCH/TOOL selector switch must be in
the TOOL position to operate these tools.
7.4A BRAKE INSTALLATION
SEE FIGURE 22 ON THE NEXT PAGE
Grease the slider block between the tool and the arm every two hours of operation.
There are two lengths of brakes available for this model: 12 and 24 inch. The brakes mount under the
upper arm in the tool station and are held down with the finger clamps provided. For maximum tonnage
available, mount the 12 inch brake as close to the frame as possible. The PUNCH/TOOL selector switch
must be in the TOOL position to operate this tool. Care must be taken to align the tool squarely under
the upper arm. There is a press brake tonnage chart - PLEASE SEE FIGURE 23 - that will be helpful
when using a brake on this machine. On this model, the 12 inch brake has 85 tons of force and the 24
inch has 65 tons.
