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Assembly Procedures

1. Lay hub on a horizontal surface with openings of shank

sockets (Fig. 3) facing up. This is normally the discharge

side of the assembly.

2. Lay blade shank in socket with discharge side of the blade

up. The discharge side of the blade is the side with the

angle setting mark. Line up the index mark on the blade

with the proper angle mark on the end of the shank socket

(Figs. 2 and 4) on the underside of assembly.

3. Place cap over blade shank with beveled end toward center.

Install U-bolts and elastic nut stops. Before tightening lock

nuts, pull the blade outward to set the key against the key-

way and check angle setting (Fig. 3).

4. Tighten elastic stop nuts evenly and torque to the following

foot-pounds:

5. Check angle setting to be sure it has not changed during

assembly. If so, loosen lock nuts and reset angle. Tighten

nuts again to proper torque. Do not over-tighten. Be sure

to tighten U-bolts evenly.

Setting Angle With Protractor (optional)

Under most conditions, the preceding assembly procedure

using the index marks is of sufficient accuracy. When greater

accuracy is desired, use a level bubble protractor. Before the

final tightening of the nuts, set the protractor on the angle

setting mark. (The hub and blade assembly must be level for

accurate setting.) Adjust the angle by tapping the shank end

with a mallet. Tighten lock nuts to proper torque. Again check

the angle setting. Rotate propeller to check angle on each blade

in the same location.

Propellers may be assembled so the cap side of the hub is

the inlet side (reverse bore). If blades do not have the index

mark on the discharge side, it is then necessary to adjust the

blade angle with a protractor.

The hub and blades are balanced separately. The weight

distribution throughout the length of the blade varies slightly.

Therefore, the balance is to a constant moment and blades

may be assembled at random even though the weights are

slightly different.

Adjustable Pitch Propeller Taper-Lock Hub

Reversible Propeller With Thru-Bolt Construction

Cap and U-Bolt Side Lock Nut Side

Fig. 1

Angle setting index on shank socket. Marked from 10° through 50°. Each

mark is 2°. When hub is viewed as shown above, scale on left side

should be used for right-hand propeller and scale on right side should

be used for left-handed propellers.

Fig. 2

Elastic Stop Nuts

Index Marks

Blade

U-Bolts

Cap

Blade

Shank

Hub

Key

Keyway

Fig. 3

Fig. 4

Angle

Setting

Mark

Index

Mark

Inlet Side Discharge Side

General Installation, Operation and Maintenance Instructions For Aerovent Products

PROPELLER HUB U-BOLT TORQUE

DIA. DIA. SIZE (FT/LBS)

54" – 72" 14" 1/2" 20

81" – 96" 18" 3/4" 45

IM-173

June 1997

1 2

Résumé du contenu

Page 1 - Assembly Procedures

Assembly Procedures1. Lay hub on a horizontal surface with openings of shank sockets (Fig. 3) facing up. This is normally the discharge side of the

Page 2 - AEROVENT

These capscrews force the taper bushing into the hub which in turn compresses the bushing onto the shaft. This makes a positive clamping fit. The to

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Aerovent IM-173 Manuel d'utilisateur

Naviguer en ligne ou télécharger Manuel d'utilisateur pour Ventilateurs Aerovent IM-173. Aerovent IM-173 User Manual Manuel d'utilisatio

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