Gardner Bender Guide to Profitable Bending - Manual (Page 19)

Offset Bend Instructions for
GB Thinwall Benders
38 19
IMPORTANT
Before starting a bend, be sure pivot pins are through the bottom
frame plate and locked in position to properly anchor.
When actuating pump, either hand or electric, operator should
position himself on the cylinder side. It is not recommended that
any bender be operated from the front position.
As bend is generated, watch optic angle gauge until desired angle
of bend is reached. Because of conduit springback, it will be
necessary to go a bit beyond the desired angle.
1. Thread hydraulic cylinder into cylinder support block on
bending frame.
2. Attach hoses to pump valve. Connect hose ① to cylinder port
① — hose ➁ to cylinder port ➁.
3. Select bending shoe for conduit to be bent. Each shoe is marked
for size and has an arrow, indicating the center point of bend to
be made.
4. Insert and lock selected bending shoe on cylinder plunger with
U-shaped lock pin.
1. Place conduit in bender frame.
2. Attach optic angle gauge to the top of pivot shoe as shown. Pin
locator on top of pivot shoes locate for correct setting of zero before
bending cycle.
3. Mount other pivot shoe. Both pivot shoes are marked for various
pipe sizes. The markings on pivot shoes must correspond to the pipe
size being bent and face the pipe.
4. Angle gauge should now read at zero when read along line scribed
on bender frame.
5. Lock both pivot shoes in position with push-button pivot pins. Pivot
pin is operated by pushing down on button with thumb while
grasping cross handle. Be sure pivot pins are inserted through
corresponding marked pipe size holes.
6. Turn pump valve as shown for manual valve and proceed to bend. If
electric push-button model, push "advance" button.
1. Retract cylinder plunger slightly by turning pump valve in opposite
direction of outward bending stroke. This will take pressure off pivot
shoes and pins. If electric push-button model, jog retract button.
2. Remove either one or both of the pivot shoes and reposition one
pivot pin in proper pipe-size “eject hole” where the pin will restrain
the conduit, not the shoe, as they retract. Four inch one-shot
frames and 5-inch frames have two eject holes. Use both holes.
3. Now fully retract the cylinder plunger. Bending shoe and conduit will
retract together until conduit meets pivot pin. On contact, conduit will
strip from shoe.
4. Remove other pivot pin and pivot shoe to remove conduit
from bender.
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