5
ADJUSTING FOR METAL THICKNESS: The hold down assembly (902) must be adjusted to
allow for clearance of the bend material according to the thickness of the material being
worked. This adjustment is made by slightly releasing the clamping pressure and moving the
forward edge of the nose bar or fingers back, away from the edge of the clamp block on the
base. This adjustment is made by loosening the bracket lock bolts (16) one on each
end of the base assembly and turning the adjustment bracket nuts (14) to move
the edge of the fingers / nose bar toward or away from the edge of the clamp
block. For 16 to 20 gauge and lighter material allow a clearance equal to twice the
thickness of the material being worked. A larger bend radius can be accomplished by
increasing the clearance.
ADJUSTING THE CLAMPING PRESURE: The clamping pressure should be adjusted
according to the thickness of the material being worked. A common cause of forming
problems is the result of either inadequate or excessive clamping pressure. Too much
clamping pressure on one or both handles typically will result in over bending the material on
that particular end or relative to the center portion of the brake. Not enough clamping
pressure force will allow the material to slip during the bending process and result in an
under bent section. This under bending is often encountered in the center of the brake.
Clamping pressure should be enough to hold the material securely in place but not so great
as to require undue effort in locking the clamp handles. Clamping pressure on the ends of
the brake is adjusted by turning the nuts (84) on the threaded rod portion of the yoke
assembly (907) which is below the clamp swivel (78). The lift of the hold down assembly is
adjusted by turning the nut above the clamp swivel. When the clamping pressure is properly
adjusted, lock the nuts against the clamp swivel to prevent any change in adjustment.
HBU48-16 BOX AND PAN BENDING: The fingers can be removed and repositioned on the
hold down assembly by moving the clamp handle fully to the rear and loosening the finger
clamp screws. Reposition the fingers to assemble the desired width and secure the fingers to
the hold down by tightening the finger clamp screws. Be certain that the tops of the fingers
are flush and parallel with the milled edge on the hold down and the finger clamps are
parallel with the bottom edge of the hold down. As a general rule, use the wider finger first
and fill in with the narrower fingers. Small gaps between the fingers may be left with no
adverse effect to the work piece. The maximum depth of box or pan which can be bent is 4-
Inches.
COUNTERWEIGHT ALIGNMENT: The counterweight on this brake can be adjusted to
balance the apron foe ease of operation. Loosen the set screws and raise or lower the
counterweight to achieve the desired degree of balance. Be certain to re-tighten the set
screws thus securing the counterweight in place.
