Textron GREENLEE 884 - Laying Out Offset Bends

884 and 885 Hydraulic Benders
Greenlee / A Textron Company 4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
8
Bending Instructions (cont’d)
Laying Out Offset Bends
An offset bend is used to route the conduit around an
obstruction. To make an offset, two bends are required.
The operator must measure the height of the offset and
determine the angle of the offset. The distance between
the two bends is the center-to-center distance.
HEIGHT OF OFFSET
OFFSET
ANGLE
CENTER-TO-
CENTER
OF BENDS
CENTER-TO-
CENTER
OF BENDS
OFFSET
1. Measure the obstruction.
2. Determine the angle of the offset bends.
3. Calculate the center-to-center distance. Refer to the
“Greenlee Offset Multiplier and Shrink Table.”
Note: If working toward an obstruction, calculate
the amount of shrink. Refer to “Calculating Shrink”
in this section of the manual.
4. Mark the conduit.
5. Refer to the bending instructions under “Bending
Conduit” in this manual.
Calculating the Center-to-Center Distance
To calculate the center-to-center distance of commonly
used offset bends, multiply the amount of offset by the
appropriate offset multiplier:
Angle of Offset Offset Multiplier
15° 3.86
22-1/2° 2.6
30° 2
45° 1.4
60° 1.2
To use this table, measure the obstruction and deter-
mine the angle of the offset. Find the angle of the offset
in the left column. Multiply the height of the obstruction
by the corresponding multiplier in the right column to
nd the center-to-center distance.
Example: 5" of offset
15° bend
Multiplier for 15°: 3.86
Multiply the amount of offset by the multiplier to nd
the center-to-center distance:
5 x 3.86 = 19.3
Round off to the nearest common fraction:
19-5/16
The “Offset Table” shows the center-to-center distance
for selected amounts of offset for commonly used
bends.
Offset Table
OFFSET ➧
2 4 6 8 10 12 14 16 18 20 22
Common
Offset
Bends
15°
Maximum
Conduit Size
3/4 1-1/2 3-1/2 4 4 4 4 4 4 4 4
Center-
to-Center
7-3/4 15-7/16 23-3/16 30-15/16 38-5/8 46-3/8 54-1/16 61-13/16 69-9/16 77-1/4 85
30°
Maximum
Conduit Size
3/4 1 1-1/2 2 2-1/2 3-1/2 4 4 4 4
Center-
to-Center
8 12 16 20 24 28 32 36 40 44
45°
Maximum
Conduit Size
1/2 1 1-1/4 1-1/2 2 2-1/2 3 3-1/2 4
Center-
to-Center
8-1/2 11-5/16 14-1/8 16-15/16 19-13/16 22-5/8 25-7/16 28-1/4 31-1/8