SET-UP OPERATOR MANUAL NBT50
4-14 Published 03-23-2018 Control # 243-14
5. Slowly rotate the drum, ensuring the first layer of cable is
evenly wound onto the drum.
6. Install the remainder of the cable, as applicable.
WEDGE SOCKETS
To install a wedge socket:
• Make sure the wedge socket is the proper size for the
cable.
• Do not mix components of different wedge socket
manufacturers.
• The wedge socket must meet the requirements of the
wedge socket and wire rope manufacturers.
State and local laws may vary and require different
attachment methods depending upon work conditions. The
user is responsible for alternate attachment methods.
Terminator Wedge Installation
The NBT50 is shipped with a terminator wedge socket which
is National Crane’s preferred type of socket (Figure 4-8).
Other wedge socket types are discussed under Wedge
Socket Installation, page 4-15.
To attach a terminator wedge (Figure 4-8), use the following
procedure:
1. Match the socket, wedge, and clip to wire rope size.
• The wire rope must pass through the “go” hole in the
wedge.
• It must not pass through the “no go” hole in the
wedge.
2. Align the live end of rope with center line of pin.
3. Secure dead end section of rope.
4. Tighten nuts on clip to recommended torque
(Figure 4-8).
5. Do not attach dead end to live end or install wedge
backwards.
6. Use a mallet to seat Wedge and Rope as deep into
socket as possible before applying first load.
FIGURE 4-8
Torque Value Table
Cable Size (inches) 3/8 7/16 1/2 9/16 5/8 3/4 7/8 1 1-1/8 1-1/4
Torque ft/lbs 45 65 65 95 95 130 225 225 225 360
Torque values shown are based upon clean dry threads free of lubrication.
Terminator Wedge Socket
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