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Pulley Combinations for the DD9FA fan with a .2518OS1BSPAO48-75PK1 Phs, 0.25 HP, ODP (Open Drip Proof) Motor
Motor Pulley: 1VL34 x 1/2
5 Turns = 2 Motor Pitch
0 Turns = 3 Motor Pitch
1/2 Turn = 0.1 Motor Pitch
RPM Range Fan Pulley Pitch Dia. Bushing Belt Qty Belt Max Turns Pitch @ Max Turns Min Turns Pitch @ Min Turns
734 - 934 AK54 x 3/4 5.2 1  AX21   4.0 2.2 1.0 2.8
Motor Pulley: 1VL40 X 1/2
5 Turns = 2.6 Motor Pitch
0 Turns = 3.6 Motor Pitch
1/2 Turn = 0.1 Motor Pitch
RPM Range Fan Pulley Pitch Dia. Bushing Belt Qty Belt Max Turns Pitch @ Max Turns Min Turns Pitch @ Min Turns
759 - 922 AK66 x 3/4 6.4 1  AX25   4.0 2.8 1.0 3.4
759 - 922 AK66H 6.4 1  AX24   4.0 2.8 1.0 3.4
934 - 1134 AK54 x 3/4 5.2 1  AX22   4.0 2.8 1.0 3.4
1104 - 1341 AK46 x 3/4 4.4 1  AX20   4.0 2.8 1.0 3.4
The manufacturer reserves the right to use alternate motors from alternate vendors that meet the operating requirements of the fan but may have slightly different specifications.

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