2
TB Wood’s • 888-829-6637
P-5071-TBW • Form 885D
SH-BB
1/4-20NC
5 ft. lb.
SD-BB
1/4-20NC
5 ft. lb.
SK-BB
5/16-18NC
8 ft. lb.
SF-BB
3/8-16NC
15 ft. lb.
E-BB
1/2-13NC
30 ft. lb.
Idler
Cap Screw
Torque
The Sure-Grip tapered, QD-style interchangeable idler bushing offers flexible and easy installation while
providing many hours of reliable service. To ensure that the bushing performs as specified it must be
properly installed. Before beginning, make sure the correct size and quantity of parts are available for the
installation.
WARNING:
Rotating equipment must be properly guarded.
It is the responsibility of the user to properly guard all rotating equipment to comply with OSHA
or any applicable regulations. Failure to properly guard may contribute to severe injury
should someone come in contact with the rotating parts or should the rotating part fail.
WARNING:
DO NOT use Wood’s products on any primary aircraft drive or any other drive which could
endanger human life should a drive component fail.
WARNING:
It is essential that the idler assembly be installed
as close to mounting structure as possible to minimize overhung loads.
Excessive loads may cause a premature failure of the stud and/or bearings of the idler bushing.
INSTALLATION
IMPORTANT – Do not use lubricants in this installation
1.
Thoroughly inspect the bore of the mating hub and the tapered surface of the idler bushing. Any paint,
dirt, grease, oil, etc.
MUST
be removed.
2
. Place the idler bushing in the mating hub. Align the drilled holes in the mating hub with the threaded
holes in the idler bushing flange. Insert the cap screws, with lock washers, through the drilled holes in
the mating hub into the tapped holes in the idler bushing flange and finger-tighten, see Figure 1. Using
a torque wrench, tighten all caps screws evenly and progressively in rotation to the torque value listed
in Table 1.
WARNING:
The tightening force on the screws is multiplied many times by the wedging action of the
bushing’s tapered surface. If extreme tightening force is applied, or if a lubricant is used, bursting
pressures will be created in the hub of the mating part.
Do not attempt to over tighten cap screws to a point where the bushing flange touches the face of
the mating part. These torque values must be adhered to or idler assembly will fail prematurely.
Table 1 – Cap Screw Tightening Torque
Figure 1
The Sure-Grip tapered, QD-style interchangeable idler bushing offers flexible and easy installation while
providing many hours of reliable service. To ensure that the bushing performs as specified it must be properly
installed. Before beginning, make sure the correct size and quantity of parts are available for the installation.
WARNING: Rotating equipment must be properly guarded. It is the responsibility of the user to
properly guard all rotating equipment to comply with OSHA or any applicable regulations. Failure to
properly guard may contribute to severe injury should someone come in contact with the rotating
parts or should the rotating part fail.
WARNING: DO NOT use TB Wood’s products on any primary aircraft drive or any other drive
which could endanger human life should a drive component fail.
WARNING: It is essential that the idler assembly be installed as close to mounting structure as
possible to minimize overhung loads. Excessive loads may cause a premature failure of the stud
and/or bearings of the idler bushing.
WARNING: Cancer - www.P65Warnings.ca.gov
INSTALLATION
IMPORTANT – Do not use lubricants in this installation
1. Thoroughly inspect the bore of the mating hub and the tapered surface of the idler bushing. Any paint, dirt,
grease, oil, etc.
MUST
be removed.
2. Place the idler bushing in the mating hub. Align the drilled holes in the mating hub with the threaded holes
in the idler bushing flange. Insert the cap screws, with lock washers, through the drilled holes in the mating
hub into the tapped holes in the idler bushing flange and finger-tighten, see Figure 1. Using a torque
wrench, tighten all caps screws evenly and progressively in rotation to the torque value listed in Table 1.
WARNING: The tightening force on the screws is multiplied many times by the wedging action
of the bushing’s tapered surface. If extreme tightening force is applied, or if a lubricant is used,
bursting pressures will be created in the hub of the mating part.
Do not attempt to over tighten cap screws to a point where the bushing flange touches the face of
the mating part. These torque values must be adhered to or idler assembly will fail prematurely.
Table 2
–
Cap Screw Tightening Torque
Idler
Cap Screw
Torque
SH-BB
1/4-20NC
5 ft. lb.
SD-BB
1/4-20NC
5 ft. lb.
SK-BB
5/16-18NC
8 ft. lb.
SF-BB
3/8-16NC
15 ft. lb.
E-BB
1/2-13NC
30 ft. lb.
