INSTALLATION INSTRUCTIONS
SeCtion i:
general inForMation
1. airFoil ProPeller and BuShingS
Sound Fighter Fans™ cast aluminum airfoil
propellers are furnished with split taper lock
bushings for mounting the propeller to the shaft.
When properly positioned, the bushing grips the
hub with a positive clamping action. The flange is
bolted to the fan hub to secure the fan, and when
the bolts are tightened, the tapered surface of the
split bushing is compressed around the shaft.
2. inStalling aSSeMBlY oF ShaFt
The first step in installing a tapered bushing
is to thoroughly clean the shaft, the bore and
exterior of the bushing, and the tapered bore
of the component. Nicks, burrs, dirt, and chips
should be removed, since they can cause a loss
of concentricity and even gripping strength. The
housing should be inserted into the hub with it’s
holes matched with the hub’s holes. The capscrews should be inserted in the holes that are
threaded on the hub side. The propeller should
then be mounted on the shaft, with the bushing in
place, and the capscrews tightened to the torque
values shown below.
3. noteS on CorreCt aSSeMBlY
A. Bushing barrel and bore of propeller are tapered
-this assures concentric mounting and a true
running propeller.
B. Capscrews, when tightened, lock bushing in
propeller. Use capscrews threaded full length.
BuShing diaMeter length torque
no. (Ft.lBS.)
H 1/4-20 1" 6
P 5/16-18 1-1/4" 13
Q 3/8-16 2" 2
SD 1/4-20 1" 6
SK 5/16-18 1-1/4" 13
For Sound Fighter FantM ProPellerS
equiPPed with SPlit taPer BuShingS
Flanged tapered
bushing bolts to hub.
Extra bolt holes are
used to facilitate
removal. Flange should
not be hammered.
Caution: MAKE SURE CAPSCREW
LENGTHS MATCH TRIANGLE ENGINEERING’S
RECOMMENDATIONS. SHORTER CAPSCREWS
FROM BUSHING MANUFACTURER ARE DESIGNED
FOR CAST IRON, NOT ALUMINUM.
C. Bushing is split so that when the locking capscrews
force the bushing into the tapered bore, the
bushing grips the shaft with a positive clamping fit
- this will withstand vibration and punishing loads
without being loosened.
D. Propeller and bushing assembly is keyed to shaft
and held in place by compression - this gives
added driving strength. The use of an optional
key for securing the bushing to the propeller hub
is generally not required, except on high speed,
high torque applications. Contact factory for
recommendations.
E. Propeller is easily removed from the shaft by
inserting and tightening two of the capscrews into
the tapped holes in the bushing flange - this forces
the bushing loose from the propeller and releases
the compression so that the entire assembly will
slide from the shaft.
SeCtion ii:
inStallation oF BuShing and ProPeller
1. inSerting BuShing
Insert bushing loosely into propeller. Do not press
or drive. Start capscrews by hand, turning them
just enough to engage threads in tapped holes on
propeller. Do not use a wrench at this time. The
bushing should be loose enough in the propeller to
move slightly.
note: DO NOT USE OIL, GREASE, OR ANTISIEZE
COMPOUNDS ON BUSHING SURFACES OR HUB
BORE.
2. PlaCing aSSeMBlY onto ShaFt
Be sure shaft and keyway are clean and smooth.
Check key size with both shaft and bushing keyway.
Slide propeller and bushing assembly onto shaft,
making allowance for end play of shaft to prevent
rubbing. Do not force propeller and bushing onto
shaft. If it does not go on easily, check shaft, bushing,
and key sizes.
3. torquing CaPSCrewS
Tighten capscrews progressively with a torque
wrench. Set torque value using guide in Section I;
SeCtion iii:
reMoVing ProPeller aSSeMBlY FroM ShaFt
1. Remove all three capscrews from propeller and hub
assembly.
2. Start two capscrews into threaded holes in the bushing
flange.
3. Tighten each bolt part of a turn, in succession, to force
the propeller off the bushing.
4. Remove the bushing from the shaft. If the assembly
has been in place for some time it may be necessary
to use a wheel puller to remove the bushing.
warning: NEVER USE A WHEEL PULLER TO
REMOVE THE PROPELLER.
Part 3 - B. Tighten capscrews using quarter to half
turns at a time, moving around the bushing flange in
the same direction until desired torque is reached.
Torque should not exceed the values recommended
by factory.
warning: DO NOT ATTEMPT TO PULL BUSHING
FLANGE FLUSH WITH HUB END; THERE SHOULD
BE A CLEARANCE GAP WHEN TIGHTENED TO
SPECIFIED TORQUE.
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