Gardner Bender B400 Series Eegor Hydraulic Benders - Manual (Page 11)

11
To Make a Stub-up or Kick Bend
1. Determine “H” dimension by measuring rise
or height needed. From “Diagonal Distance
Chart” at right, determine straight length of
pipe (D) needed to reach to desired turn-up
height (H) at desired bend angle.
2. Lay off this distance (D) from end of conduit
and make first mark.
3. From “Set-back Chart”, select proper
set-back dimension (S) corresponding to
conduit size and bend angle desired.
4. Measure distance (S) back from the first mark and make second mark (see figure above).
5. Place conduit in bender with second mark aligned with leading edge of U-strap (see figure above) and bend
conduit to desired angle.
D
D
S
1st Mark
2nd Mark (Position leading edge of U-Strap at this mark.)
Turn-up
or
Rise (H)
Angle
Additional Bending Data for Eegor ® Benders
Developed Length of Bend:
When conduit is bent, the length along the bend at the neutral
axis (i.e., approximately the centerline of the pipe) is commonly
called “developed length” of the bend.
Gain of Bend:
The difference between the “squared off” distance (AB + BC) around a corner and the “developed length” (AC)
along a bend is commonly called “gain” of the bend. (Measurements should be made at the pipe centerline.)
Nominal “Gain” of Bends
Conduit Measured at Centerline (inches)
Size 90° 60° 45° 30° 15°
2 1 ⁄ 2 5 3 ⁄ 16 1 1 ⁄ 2
3 ⁄ 4
5 ⁄ 16
1 ⁄ 8
3 6 3 ⁄ 8 1 7 ⁄ 8
7 ⁄ 8
3 ⁄ 8
1 ⁄ 8
3 1 ⁄ 2 8 7 ⁄ 16 2 7 ⁄ 16 1 1 ⁄ 8
1 ⁄ 2
1 ⁄ 8
4 9 11 ⁄ 16 2 3 ⁄ 4 1 5 ⁄ 16
9 ⁄ 16
3 ⁄ 16
Nominal “Developed Length" of Bends
Conduit (inches)
Size 90° 60° 45° 30° 15°
2 1 ⁄ 2 16 3 ⁄ 8 10 15 ⁄ 16 8 3 ⁄ 16 5 7 ⁄ 16 2 3 ⁄ 4
3 20 1 ⁄ 4 13 1 ⁄ 2 10 1 ⁄ 8
6 3 ⁄ 4
3 3 ⁄ 8
3 1 ⁄ 2
24 7 ⁄ 16 18 5 ⁄ 16 13 3 ⁄ 4 9 1 ⁄ 8 4 9 ⁄ 16
4 31 3 ⁄ 8 20 15 ⁄ 16 15 11 ⁄ 16 10 7 ⁄ 16 5 1 ⁄ 4
A
B C
“Developed Length” of Bends Chart
“Gain” of Bends Chart
Offset Bend Instructions
for the Eegor ® Bender
Bending Offsets
Offset bending is easy with the added
benefit of bending good close offsets.
A. To bend the offsets, proceed to bend
in the normal manner covered above
until the desired bend is reached.
See Figure 39.
B. Retract and strip out conduit. Rotate the conduit and locate as shown for the second bend. Complete the
second bend, retract and strip out conduit for a good offset bend.
When making offset bends, caution should be taken not to attempt too tight an offset. The follow bar will
lift off the conduit when starting the second bend if it is too tight. Stop bending immediately or damage
could occur to the bender. Correction is achieved by shifting the conduit so the U-strap engages the
conduit more closely to the unbent portion of the conduit.
Figure 39 Figure 40