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Pulley Combinations for the DD11FA 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
868 - 1104 AK46 x 3/4 4.4 AX19   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 AX25   4.0 2.8 1.0 3.4
934 - 1134 AK54 x 3/4 5.2 AX22   4.0 2.8 1.0 3.4
1104 - 1341 AK46H 4.4 AX20   4.0 2.8 1.0 3.4
1104 - 1341 AK46 x 3/4 4.4 AX20   4.0 2.8 1.0 3.4
1313 - 1594 AK39 x 3/4 3.7 AX18   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.