For gb thinwall bender sets, How to use eject-o-matic, One-shot benders a – Gardner Bender Guide to Profitable Bending User Manual
Page 18: Offset chart
For GB Thinwall Bender Sets
1. Mark first bend following instructions (1 - 3) in “Kick Bend”
instructions for Thinwall Bender Sets (pg. 36) to get dimension (M).
2. Using the same dimension (H) and the same angle of bend, obtain
measurement (B) in Offset Chart.
3. Mark off same dimension bend measurement (B) on thinwall
as illustrated.
4. Place thinwall in bender, aligning first bend mark (M) with arrow
on bending shoe. Proceed to bend, reading angle on rear edge
of frame.
5. Rotate thinwall 180° and align second bend mark (B) with arrow on
bending shoe. Proceed to bend, reading angle on rear edge of
frame. (Angle on shoe includes approximate springback.)
39
Offset Chart
Offset Measurement
(B)
Required
(Inches)
(H)
15°
30°
45°
60°
2"
7
1
⁄
4
—
—
—
4"
15
7
3
⁄
8
—
—
6"
22
3
⁄
4
11
3
⁄
8
8
—
8"
30
1
⁄
2
15
3
⁄
8
10
5
⁄
8
—
10"
38
1
⁄
8
19
3
⁄
8
13
5
⁄
8
10
1
⁄
2
12"
45
3
⁄
4
23
3
⁄
8
16
1
⁄
2
12
7
⁄
8
14 "
53
1
⁄
2
27
3
⁄
8
19
1
⁄
4
15
1
⁄
4
16"
61
1
⁄
4
31
3
⁄
8
22
17
1
⁄
2
18"
69
35
3
⁄
8
24
7
⁄
8
19
3
⁄
4
20"
76
3
⁄
4
39
3
⁄
8
27
3
⁄
4
22
1
⁄
8
22"
84
1
⁄
2
43
3
⁄
8
30
5
⁄
8
24
1
⁄
2
24"
92
47
3
⁄
8
33
1
⁄
4
26
3
⁄
4
18
How to Use Eject-O-Matic
®
One-shot Benders
A
to assemble
B
to bend pipe
C
to eject pipe
E-507 Guide to Profitable Bending rA.qxd 10/19/09 3:17 PM Page 35