884 and 885 Hydraulic Benders
Greenlee / A Textron Company 4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
6
Illustrated Bending Glossary
1. amount of offset—the
distance that the conduit or
pipe must be re-routed to
avoid an obstruction; refer
to offset bend in this glos-
sary and “Laying Out Offset
Bends” in this manual
2. back-to-back bend—any
U-shaped bend formed by
two parallel 90° bends with
a straight section of conduit
or pipe between the bends
3. center-to-center
distance—the distance
between the succes-
sive bends that make up
an offset or a three-bend
saddle
4. degrees per shot—a
segment bending term
which refers to the amount
of bend accomplished each
time the conduit is bent;
to achieve a smooth bend,
each shot must accom-
plish the same number of
degrees of bend
5. depth of offset—same as
amount of offset
6. developed length—the
actual length of pipe
that will be bent; refer to
distance “d” in the following
illustration
7. gain—the difference
between the straight-line
distance (a + a) and the
shorter radial distance, (d)
where:
θ = angle of bend
r = the centerline bending
radius of the
bending shoe
8. height of offset—same as
amount of offset
9. kick—single bend of less
than 90°
10. leg length—the distance
from the end of a horizontal
section of conduit or pipe
to the bend; measured from
the end to the outside edge
of the conduit or pipe
11. 90° bend—any bend that
changes the direction of the
conduit or pipe by 90°
12. number of bending shots—a
segment bending term which
refers to the total number of
small bends that are required
to make up a more gradual
segment bend
13. O.D.—the size of any piece of
conduit or pipe as measured
by its outside diameter
14. offset bend—two bends with
the same degree of bend;
used to avoid an obstruction
blocking the run of the conduit
or pipe
15. ram travel—the distance
that the ram of hydraulic
bender moves to accomplish
a particular bend; inches of
ram travel are proportionate to
degrees of bend
16. rise—the distance from the
end of a vertical section of
conduit or pipe to the bend;
measured to the centerline of
the conduit or pipe
17. segment bend—any bend
formed by a series of bends of
a few degrees each, rather
than a single bend; allows a
more gradual bend
18. shot—a single bend; a shot
may accomplish a complete
bend or, when making a
segment bend, several shots
may be required to make a
more gradual bend
19. shrink—the amount of conduit
“lost” when laying out an
offset bend working toward
an obstruction; refer to the
explanation under “Laying Out
Offset Bends” in this manual
20. springback—the amount,
measured in degrees, that
a conduit or pipe tends to
straighten after being bent
21. stub—same as rise
22. stub-up—same as rise
a
a
d
r
θ
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