Benders and ultra eegor, Benders, Developed length of bend – Gardner Bender Guide to Profitable Bending User Manual
Page 10: Gain of bend, Developed length” of bends chart, Gain” of bends chart
47
DO NOT ATTEMPT TO BEND CONDUIT OTHER THAN
1
⁄
2
" EMT
(THINWALL), IMC AND RIGID OR
3
⁄
4
" EMT CONDUIT. USE OF ANY
OTHER SIZES OR TYPES OF CONDUIT WILL DAMAGE THE
BENDER AND COULD CAUSE INJURIES.
Operating Procedures
1. Bending conduit is accomplished using jaws on the frame to stabilize
the conduit. The jaws are designed to accomidate specific types and
sizes of conduit.
2. Determine the size and type of conduit, and the offset height
required. Review the bracket decals to locate the correct side of the
frame to use. See Figure 5.
1
⁄
2
" EMT
Pin Position
Offset Height
Range
Add to Height
for Springback
1
2
3
0"-
3
⁄
4
"
0"-2"
0"-3"
+
1
⁄
8
"
+
3
⁄
16
"
P
atent pending
Pin Position
Offset Height
Range
Add to Height
for Springback
3
2
1
0"-2
1
⁄
2
"
0"-1
1
⁄
2
"
0"-
3
⁄
4
"
+
1
⁄
2
"
+
3
⁄
8
"
+
1
⁄
4
"
P
atent pending
3
⁄
4
"EMT
+
5
⁄
16
"
3. Each bracket decal contains three vital pieces of information.
a. Pin Position: Three locations to insert retaining pin, which
will produce different heights of offset bends.
b. Offset Height Range: The range of offset height that this pin
hole position will produce. (ie. 0-
3
⁄
4
", 0-2" and 0-3")
c. Add to Height for Springback: The fraction with a plus sign
indicates the amount to add to the offset height to correct for
conduit springback.
4. Select the correct hole location on the bracket, pull the retaining pin
and move the bracket until the selected hole lines up with the frame
hole. Insert the retaining pin. See Figure 1
No-Dog Offset Bender
Instructions BOS57/BOSA57
Other Bending Data
for Eegor
™
Benders and
Ultra 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
“Developed Length” of Bends (inches)
Conduit
Size
90°
60°
45°
30°
15°
2"
16
7
⁄
16
10
15
⁄
16
8
3
⁄
16
5
1
⁄
2
2
3
⁄
4
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
10
“Developed Length” of Bends Chart
Nominal
“Gain” of Bends Measured at Centerline (inches)
Conduit
Size
90°
60°
45°
30°
15°
2"
5
1
⁄
16
1
7
⁄
16
11
⁄
16
1
⁄
4
1
⁄
16
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
“Gain” of Bends Chart
E-507 Guide to Profitable Bending rA.qxd 10/19/09 3:17 PM Page 19