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Installing Die Sets
The Model 4 bender comes with 4 pins. Locate the pins listed below:
1 1" Diameter x 8" Frame Pin
2 7/8" Diameter x 8" Long Frame Pins (Long Pin)
1 7/8" Diameter x 6 1/4" Long Drive Pin (Short Pin)
A Die Set consists of the 3 parts listed below:
1 Forming Die (Circular in shape, usually with a groove)
1 Pressure Die (The part that slides along the workpiece)
1 U-Block (A small square block that retains the workpiece, also usually has a groove)
STEP 1 - INSTALL THE FORMING DIE
Forming Die Installation
There are two styles of forming dies. One has a
square block welded to its backside as shown in left side
of figure 17. The other doesn't as shown in right side of
figure 17. The method of die installation depends on what
style you have.
Installing a Die without a welded block:
Using the 1" frame pin, place the forming die into the
bender with its rounded side forward as shown in figure
18. The forming die will normally only have one other hole
drilled through it, as shown on the right side of figure 17.
This hole is very close to the die's edge, usually within
a 1/8"-1/4". If there is more than one hole, use the hole
closest to the die's edge. Model 1, 2 and 3 die sets will
work in the Model 4, however they usually will have 3 to 5
holes drilled through them. So with those dies you would
only use the hole closest to the flat side of the die.
Rotate the die until the hole in the die lines up with
one of the NUMBERED holes 1 - 4 in the frame (not the
lettered holes). Insert one of the two long 7/8" frame pins
through the frame and die. This pin will prevent the die
from rotating when the bender is operating.
Installing a Die with the welded block:
Using the 1" frame pin, place the forming die into the
bender as shown in figure 19 with the welded block closest
to the frame bolts. The die shown has multiple drive holes
drilled in it. Only the one closest to the die's flat side (it
will be the one nearest to the welded block) needs to be
used. A long 7/8" frame pin has been installed in the hole
closest to the dies welded block. Installed this way the
welded block serves no function. This would be the case
if a Model 3 die set was being used in the Model 4.
If the forming die does NOT have any drive holes,
only a welded block, then install the die as shown but
do not use a 7/8" pin. In this case, when the bender is
operating, the welded block on the die will rotate clockwise and contact the workpiece, thus preventing
the die from rotating. Note that if the die has a welded block and drilled drive holes you can use either the
welded block or the first drive hole.
Drive Holes
Figure 16 - Die styles
Forming Die
1" Frame Pin
7/8" Frame Pin
Figure 17 - Die installed
Figure 18 - Die with welded block