Current Tools 254 - Cylinder Travel and Bender Calibration

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CYLINDER TRAVEL AND BENDER CALIBRATION
1. The bender must be calibrated prior to bending. To calibrate, rotate the pump
valve lever to the closed position and activate the pump to advance the
hydraulic cylinder until the shoe, conduit and follow bar tighten up. Stop the
pump and DO NOT advance the cylinder far enough to start a bend.
2. Read the measurement on the gauge rod and compare that with the 0˚ (tight)
number for the appropriate conduit type and size on the charts below. If there
is a difference in these two numbers, that difference must be included in the
cylinder travel measurements for that type and size of conduit.
CYLINDER TRAVEL ( APPROXIMATE )
EMT CONDUIT
DEGREE OF BEND 2 1/2" (90°) 3" (90°) 3 1/2" (90°) 4" (90°)
0°
(tight)
4
3
⁄16 3
7
⁄8 2
7
⁄8 2
3
⁄16
10°
4
7
⁄8 4
7
⁄8 3
15
⁄16 3
3
⁄8
15°
5
3
⁄16 5
3
⁄16 4
3
⁄8 3
3
⁄4
30°
6
1
⁄8 6
1
⁄4 5
7
⁄16 4
7
⁄8
45°
7
1
⁄16 7
1
⁄8 6
1
⁄2 6
1
⁄16
60° 8
8
3
⁄16 7
5
⁄8 7
3
⁄16
90°
9
1
⁄2 10
3
⁄8 9
7
⁄8 9
1
⁄2
IMC CONDUIT
DEGREE OF BEND 2 1/2" (90°) 3" (90°) 3 1/2" (90°) 4" (90°)
0°
(tight)
2
7
⁄8 2
1
⁄4 1
5
⁄8 1
1
⁄16
10° 4
3
9
⁄16 2
15
⁄16 2
7
⁄16
15°
4
3
⁄8 4
1
⁄16 3
7
⁄16
3
30°
5
3
⁄16 5
5
⁄8 4
7
⁄8 4
5
⁄8
45°
7
5
⁄16 7
3
⁄16 6
3
⁄8 6
1
⁄4
60°
8
3
⁄4 8
9
⁄16 8
1
⁄16
8
90°
11
3
⁄16 11
13
⁄16 11
1
⁄4 11
1
⁄4
RIGID CONDUIT
DEGREE OF BEND 2 1/2" (90°) 3" (90°) 3 1/2" (90°) 4" (90°)
0°
(tight)
2
7
⁄8 2
5
⁄16 1
7
⁄16
1
10°
3
13
⁄16 3
9
⁄16 2
13
⁄16 2
3
⁄8
15°
4
5
⁄16
4
3
5
⁄16 2
15
⁄16
30°
5
11
⁄16 5
7
⁄16 4
13
⁄16 4
5
⁄8
45°
7
1
⁄8 7
1
⁄16 6
3
⁄8 6
3
⁄16
60°
8
9
⁄16 8
11
⁄16 7
13
⁄16 7
13
⁄16
90°
11
1
⁄16 11
3
⁄4 10
7
⁄8 11
1
⁄8
NOTE: Read the gauge rod at the
edge of the cylinder mounting
block. Gauge rod should read zero
(ø) when cylinder is fully retracted.