FloAire FKB-INLINE - Manual (Page 11)

11
Pulley Setscrew Torque
Thread Size Torque (IN/Lb)
No. 10 (bushing) 32
1/4” (bushing) 72
5/16” 130
Pulley Adjustment (Belt Drive Fans)
The adjustable motor pulley is factory set for the RPM specified.
Speed can be increased by closing or decreased by opening the
adjustable motor sheave. Two groove variable pitch pulleys must be
adjusted an equal number of turns open or closed. Any increase in
speed represents a substantial increase in horsepower required by
the unit. Motor amperage should always be checked to avoid
serious damage to the motor when the speed is varied. Always
torque setscrews according to the setscrew torque chart.
Pulley Alignment
Proper Belt Tension