ROOTS™ 56 Universal RAI-J Blower
Model: 56 URAI-J
The ROOTS™ 56 URAI-J™ WHISPAIR™ rotary blower is engineered for quieter continuous-duty industrial airflow with capacities up to 580 CFM, 13 PSI pressure, 15″ Hg vacuum, and speeds to 2850 RPM. Its rugged cast-iron casing, precision two-lobe impellers, carburized alloy steel timing gears, oversized anti-friction bearings, and ROOTS’ exclusive figure-eight gearbox design help reduce vibration, airflow pulsation, and operational noise while improving oil distribution, bearing life, and long-term blower reliability.
Technical Details
ROOTS™ 56 Universal RAI-J
Model: Roots Model 56 URAI-J®
Flow Range: to 580 CFM
Max Δ Pressure: 13 psi
Max Δ Vacuum: 15″ Hg
Max RPM: 2850
Min RPM: 763
Max ΔT: 225˚F
Connection Size: 4″ FPT
Shaft Diameter: 1.125″
Drive End Lubrication: Grease
Gear End Lubrication: Oil
Required Oil for Gear End Horizontal Unit: 27.6 ounces
Required Oil for Gear End Vertical Unit: 16 ounces
Unit Weight: 180 pounds (81.8 kg)
56 URAI-J Blower Design & Construction Features
Detachable steel mounting feet
Rigid one-piece cast-iron casing
Anti-friction bearings
Splash oil lubricated spur timing gears
Straight precision-machined two-lobe impellers
Ground steel shafts
Standard pipe size connections
Cylindrical roller bearing for V-belt load resistance
Computer-designed cast relief for noise suppression
Lower vibration and reduced air pulsation design
Performance Advantages
Lower operational noise
Reduced air pulsation
Lower vibration levels
Extended bearing and gear life
Reliable continuous-duty operation
Improved airflow stability for industrial systems