Figure 7. Attaching the Rack to the Form Shoe
NOTE
g. While holding the rack in engagement with the form
shoe, slide the form shoe into place alongside the tube
which is clamped into the form block. The end of the form
shoe should be inserted far enough to almost touch the
clamp yoke. (See figure 8.) If the form shoe slide block is
in too far to permit insertion of the form shoe, retract the
feed screw until the form shoe can be slipped into place.
h. While holding the form shoe against the tube to be
bent, rotate the feed screw until the pressure plate in the
form shoe slide block is in light contact with the form shoe.
(See figure 9.) This will hold the form shoe in place while
making further preparations for making the bend.
Do not tighten the feed screw at this time, as it will
spring the screw post enough to prevent engagement
of the tension yoke.
i. Rotate the bend indicating plate (dial) until the slot at
the center of the dial is parallel with the flat key milled on
the upper end of the drive shaft. Move the tension yoke
into position and press downward until the milled key on
the end of the drive shaft passes through the cap slot at the
center of the dial. (See figure 10.)
Figure 8. Sliding the Form Shoe and Rack
Into Position
Figure 9. Rotating Feed Screw With
Double Ended Wrench
NOTE
If difficulty is experienced in engaging the
tension yoke, loosen the feed screw slightly.
j. For original bends in straight tubing, the parts should
be positioned so that the dial is set at zero, however, the
initial starting point can be positioned at any desired
location to accommodate tubes already having partial
bends. When the dial is engaged with the milled key on
the end of the drive shaft the degree of the bend already
in the tube will be indicated.
5
Figure 6. Tightening the Clamp Yoke on the
Form Block
on the form block. Tighten the clamp yoke screw with the
double-ended wrench provided.
f. Select a form shoe containing the correct size groove for
the tube to be bent, and engage the dowels on the rack into
the holes on the underside of the form shoe. (See figure 7.)
The form shoe can be turned end to end, with respect to the
rack, to select the proper size groove in the form shoe.
WRENCH
CLAMP YOKE
FORM SHOE
TUBE
WRENCH
FEED SCREW
TUBE
FORM SHOE
RACK
