Pulley Combinations for the RAM7.144-A225-25H fan with a NP05043 Phs, 50 HP, TEFC, Premium (E-Plus3) Eff. Motor
Motor Pulley: 3B5V70
0 Turns = 7.1 Motor Pitch
0 Turns = 7.1 Motor Pitch
1/2 Turn = 0 Motor Pitch
RPM Range Fan Pulley Pitch Dia. Bushing Belt Qty Belt by Discharge Max Turns Pitch @ Max Turns Min Turns Pitch @ Min Turns
Down Side
447 - 447 3B5V278 28.1 3    5VX1030   0.0 7.1 0.0 7.1
Motor Pulley: 4B5V64
0 Turns = 6.4 Motor Pitch
0 Turns = 6.4 Motor Pitch
1/2 Turn = 0 Motor Pitch
RPM Range Fan Pulley Pitch Dia. Bushing Belt Qty Belt by Discharge Max Turns Pitch @ Max Turns Min Turns Pitch @ Min Turns
Down Side
482 - 482 4B5V234 23.5 4  5VX1000     0.0 6.4 0.0 6.4
Motor Pulley: 4B5V66
0 Turns = 6.6 Motor Pitch
0 Turns = 6.6 Motor Pitch
1/2 Turn = 0 Motor Pitch
RPM Range Fan Pulley Pitch Dia. Bushing Belt Qty Belt by Discharge Max Turns Pitch @ Max Turns Min Turns Pitch @ Min Turns
Down Side
497 - 497 4B5V234 23.5 4    5VX1060   0.0 6.6 0.0 6.6
Motor Pulley: 4B5V74
0 Turns = 7.5 Motor Pitch
0 Turns = 7.5 Motor Pitch
1/2 Turn = 0 Motor Pitch
RPM Range Fan Pulley Pitch Dia. Bushing Belt Qty Belt by Discharge Max Turns Pitch @ Max Turns Min Turns Pitch @ Min Turns
Down Side
476 - 476 4B5V278 27.9 4  5VX1030     0.0 7.5 0.0 7.5
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.