Laying Out Bends; Stubs; Offsets - Greenlee 881 Cam Track Instruction Manual

Laying Out Bends

The following drawings and bending charts are intended
to provide the information necessary to accomplish the
most common types of bends. The Special Bending
Information Chart contains precise measurements for
the most commonly needed bends.

Stubs

HEIGHT
(H)
ANGLE
← Y →
MARK
1. Select the size and type of conduit. Determine the
height of stub and the angle of bend.
2. Find the chart that corresponds to the size and type
of conduit selected in Step 1.
3. Under the column labeled ANGLE, find the angle of
bend.
4. Find the row labeled Y. In the row at the top of the
page, find the height (H) of the stub.
5. The number shown at the intersection of row Y and
the appropriate H column is the distance Y. Place
the bending mark Y inches from the end of the
conduit.
6. Bend the conduit.
Greenlee / A Textron Company
881 and 881CT Cam Track

Offsets

An offset is used to route the conduit around an
obstruction. To make an offset, two equal bends are
required. The distance between the two bends is the
center-to-center distance. This is represented by L1
in the bending tables.
When working past an obstruction, it is necessary to
determine the location of the first bend. The center-to-
center distance is then used to find the location of the
second bend. See Offsets: Working Past an Obstruction.
When working toward an obstruction, it is necessary to
determine the location of the second bend. The center-
to-center distance is then used to find the location of the
first bend. See Offsets: Working Toward an Obstruction.
Offsets: Working Past an Obstruction
←
1. Select the size and type of conduit. Measure the
height of the obstruction and the distance labeled
LENGTH. Select the angle to be used.
2. Find the chart that corresponds to the size and type
of conduit selected in Step 1.
3. To the right of the size and type of conduit, find the
dimension labeled X. Subtract X from LENGTH.
Place the first bending mark this distance from the
end of the conduit.
4. Under the column labeled ANGLE, find the angle of
bend. Find the row labeled L1. In the row at the top
of the page, find the height (H) of the offset.
5. The number shown at the intersection of row L1 and
the appropriate H column is L1. Place the second
bending mark L1 inches from the first bending mark.
6. Bend the conduit.
26
®
Hydraulic Benders
START OF
FIRST
BEND
← →
LENGTH
ANGLE
→ ←
LENGTH – X
L1
BENDING
MARK 1
4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
→
BENDING
MARK 2