Suggested replacement motor: Lennox HVAC furnace motor 100648-01, 18M2501, 21L90, 21L9001, 18M25, 18M2501, 21W84, 51W87, 86H66, 86H6601, 100648-01, 100648-02. 
Application: Lennox Direct Drive Tri-Mount Blower Motor
 
Description :
Body Diameter (Inches): 5-5/8
Frame: 48Y,
HP: 1/5
Volts (V): 115
Frequency: 60Hz
Amperage: 3.1
Phase: 1
RPM: 1075
Speeds: 3
Rotation: Opposite Shaft End: CCW
Bearing: Sleeve
Enclosure: Open
Shaft Dimensions (in): 1/2 x 3.0
Motor Type: Permanent Split Capacitor
Capacitor: 5MFD 370V
Blower Motor Tri-Mount Direct Drive.