Laying Out Two-Shot 90° Bends For 3-1/2" And 4" Conduit (881 Only) - Greenlee 881 Cam Track Instruction Manual

Laying Out Two-Shot 90° Bends for
3-1/2" and 4" Conduit (881 Only)
1. Measure the length of the required stub.
2. Find the Minimum Stub Length on the Table 2:
Deduct, Stub Dimensions, and Minimum Distance
from End of Conduit. The stub you require must be
equal to or longer than the minimum stub length.
3. Measure and mark the stub length on the conduit.
This is Mark 1
4. Find the Deduct on Table 2. Subtract the Deduct
from Mark 1 and make a new mark. This is Mark 2,
or the first bending mark. Find the Minimum Dis-
tance from End of Conduit in Table 2; be sure that
Mark 2 is at least this distance from the end of the
conduit.
5. Measure and make Mark 3, or the second
bending mark:
• For 3-1/2" conduit, Mark 3 must be 14-1/2 inches
from Mark 2.
• For 4-1/2" conduit, Mark 3 must be 15-1/2 inches
from Mark 2.
6. See Figure 6: For Making 90° Bends on 3-1/2" and
4" Conduit. Using the suggested amount of ram
travel, align Mark 2 with the outside edge of the
saddle and bend the conduit.
7. Align mark 3 with the outside of the saddle.
Note: A portion of the previous bend will fall inside
the shoe.
8. Bend the conduit until the 90° bend is complete.
MARK
NO. 3
MARK
NO. 1
Greenlee / A Textron Company
881 and 881CT Cam Track
STUB LENGTH
DEDUCT
MARK
NO. 2
EMT CONDUIT SIZE
RAM 3-1/2
TRAVEL 4
IMC CONDUIT SIZE
RAM 3-1/2
TRAVEL 4
RIGID CONDUIT SIZE
RAM 3-1/2
TRAVEL 4
FIRST BEND
MARK NO. 2
The 45° two-shot shoes and follow bars are not
interchangeable with the 90° one-shot shoes
and follow bars. See Illustration.
THIS SHOE
PROFILE
THIS SHOE
PROFILE
25
4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
®
Hydraulic Benders
1ST
BEND
10-3/16 9-3/4
8-3/16 8-3/16
1ST
BEND
11-1/4 10-11/16
9 9-1/16
1ST
BEND
11-1/8 10-1/2
8-5/16 8-7/8
SECOND BEND
MARK NO. 3
MATCHES
LONG (OVER 36")
FOLLOW BAR WITH
SIDE POCKETS
MATCHES
SHORT FOLLOW BAR
WITH SMOOTH SIDES
90°
90°
90°