Gardner Bender Guide to Profitable Bending - Manual (Page 15)

42
Offset Bend Instructions for
Mechanical Sidewinder ® Benders
1. Locate first bend at the edge of the step over which conduit will be
formed. Place first mark 1 1 ⁄ 2 ” short of where bend is to start (see
Figure 1 above).
2. Multiply known (H) dimension by multiplier shown in chart below
under size of conduit and desired angle.
3. To obtain measurement (B), add correction factor in chart to the
figure obtained in step 2 and mark (B) as illustrated.
4. Place conduit or thinwall in bender, aligning first bend mark with
forward edge of bending shoe. Prodeed to bend, reading angle on
indicator.
5. Rotate conduit or thinwall 180˚ and align second bend mark with
forward edge of bending shoe bend mark with the forward edge of
bending shoe. Proceed to bend, reading angle on indicator.
30° 45°
Correction Correction
Size Multiplier Factor Multiplier Factor
Rigid EMT Rigid EMT
1 ⁄ 2 2 0 0 1.4 0 0
3 ⁄ 4 2 0 0 1.4 0 0
1 2 0 0 1.4 0 0
1 1 ⁄ 4 2 0 1 ⁄ 2 1.4 0 1 ⁄ 2
1 1 ⁄ 2 2 0 7 ⁄ 16 1.4 0 7 ⁄ 16
2 2 0 0 1.4 0 0
+
Edge Of Step
(Obstacle)
1 / 1 2 ˝
1st Mark
B
Figure 1
Figure 2 Angle
B
Angle
H
Edge
of Shoe
First Bend
Edge of Shoe
Second Bend
IMPORTANT
Before starting a bend, make sure pivot pins are through the pivot
assemblies, the bottom frame plate and locked firmly in the hole.
When activating the hydraulic pump, the operator must stand at
the cylinder side of the bender. Due to bending forces it is not
recommended to operate any bender from the front or frame side
of the bender.
During bending, watch the optic angle gauge until the gauge
indicating line for the desired angle is aligned with the mark on
the frame. Due to conduit spring back, it is usually
necessary to bend slightly more than the required angle.
Use Stub-up, Kick Bend and Offset Bend Charts on pages 20 thru 24.
ASSEMBLY
1. Thread the hydraulic cylinder into the cylinder support block on the
bending frame.
2. Attach hoses to pump valve; connect cylinder hose ① to valve port
①; connect cylinder hose ➁ to valve port ➁.
3. Select bending shoe for conduit size. Each shoe is marked for sizes.
An arrow indicates the center of bend to be made.
4. Insert and lock bending shoe onto cylinder plunger. Use “U” shaped
lock pin. Refer to Conduit Size Chart.
BENDING
1. Place conduit into bender frame and against the shoe groove.
2. Attach the optic angle gauge to the pivot assembly being installed in
the frame where the scribed line runs between each hole. Position
the pivot assembly with the follower bar (grooved side) toward the
conduit. Be sure follower bar is centered within the pivot assembly.
3. Secure the pivot assemblies with pivot pins. Press release knob on
the pin and insert it through the top frame, pivot assembly and
through the bottom frame. Pin retaining balls must be under the
bottom frame.
15
! CAUTION
continued on next page
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