TM 5-3895-374-24-2
Sure-Grip®
Sheave-Bushings
Installation Instructions
The Sure-Grip tapered. OD-type interchangeable
bushing offers flexible and easy installation while
providing exceptional holding power. To ensure that the
bushing performs as specified, it must be installed
properly.
Before beginning the installation, identify the bushing as follows: Sizes JA through SK manufactured from “Sinsteel" All but
Size JA have provision for a setscrew over the keyway IMPORTANT: Wedging the bushing to spread it during placement
on the shaft could damage the bushing DO NOT wedge these bushings Sizes SH through SK manufactured from steel do
not have a keyway setscrew Sizes SF through S are made from cast iron or ductile iron.
To Install:
IMPORTANT: DO NOT USE LUBRICANTS IN THIS INSTALLATION
1
Thoroughly inspect the bore of the mating part
and the tapered surface of the bushing. Any
paint, dirt. oil, or grease MUST be removed.
Fig. 2. Reverse Mounting
2
It
following
the
STANDARD
MOUNTING
procedure and placing the bushing flange
toward the motor, place the bushing on the shaft,
see Fig. 1. Bushings : NOT made of Sinsteel
may require slight wedging to slip on the shaft.
To wedge them. insert a screwdriver into the
saw cut through the flange of the bushing. DO
NOT wedge Sinsteel bushings, as this may
damage ]hem. Place the bushing and its key on
the shaft and position them for correct axial
alignment of the drive.; Place the mating part on
the bushing, aligning the drilled holes in the part
with the threaded holes in the bushing. On M
through S bushings. the mating part and
bushing MUST be assembled so the two
threaded holes in the mating part are located as
far as possible from the saw cut in the bushing
Insert the cap screws through the mating part
hub into the bushing flange and finger-tighten them.
3
If following the REVERSE MOUNTING procedure,
assemble the bushing loosely into the mating part and
insert the cap screws through the drilled holes in the
mating part and thread them into the bushing; see
Fig. 2. Place the assembly and its key on the shaft
Bushing-NOT made of Sinsteel may require slight
wedging to allow a slip fit into position. To wedge,
insert a screwdriver into the sawcut in the bushing
flange. DO NOT wedge Sinsteel bushings, as this
may damage them. Position the assembly for axial
alignment of the drive. See Fig. 3.
Fig. 3
4. With the drive properly aligned, tighten all cap screws
evenly and progressively in rotation to the torque
values listed in the table below. When the screws are
tightened properly, the listed torque value will remain
on all cap screws and there will be a slight gap
between the flange of the bushing and the face of the
mating hub DO NOT attempt to lighten enough to
close this gap. Recheck drive alignment. If the
bushings have setscrews over the keyways. insert
and 58) tighten them.
page 3 - 858
