5 HP Air Compressor Motor 3450 RPM 230V Single Phase - Commercial Duty

In this review of the 5 HP Air Compressor Motor by Cuilvu, the bottom line is simple: this motor is for users who need a compact, high-speed replacement for commercial or heavy-duty air compressors that run on single phase 230V power. The review finds that the motor delivers reliable continuous performance at 3450 RPM with a robust rolled steel housing and open drip proof enclosure suited to relatively clean, dry environments. It stands out for efficiency and cooling thanks to many heat sinks and supports typical compressor installations with a 7/8' keyed shaft and 2.25' shaft length.

Key Features

• 5 HP power: Provides strong output for medium to large air compressors, improving pump throughput and runtime efficiency.
• 3450 RPM max speed: High rotational speed helps compressors reach cut-in pressures quickly for less idle time.
• 230V single phase: Fits standard single-phase supply in workshops and job sites without special wiring.
• Open drip proof (ODP) enclosure: Best used in relatively clean, dry environments where ventilation and heat dissipation matter.
• Rolled steel shell: Durable frame construction resists wear in commercial settings and offers a smooth exterior finish.
• 7/8' keyed shaft: Standard shaft diameter and 2.25' length simplify mounting to existing compressor pulleys and couplings.

Who It's For

This motor is aimed at small machine shops, maintenance teams, and serious hobbyists who operate single-phase air compressors and need a dependable, continuous-duty replacement motor. Its 2-pole design and 3450 RPM rating suit systems where higher pump speed improves performance.

It is not intended for wet, dusty, or corrosive environments because the ODP/IP23 rating favors cleaner spaces; users who need fully enclosed, waterproof, or explosion-proof motors should look elsewhere. Also, buyers who require a different voltage or three-phase power must select the appropriate motor type.

Pros & Cons

Pros

• High working efficiency at 3450 RPM reduces runtime and boosts compressor recovery speed.
• Robust rolled steel housing and multiple heat sinks improve durability and cooling under continuous operation.
• Standard 7/8' keyed shaft and 2.25' length make it straightforward to fit on common compressor drives.
• Protector included and designed specifically for air compressor use simplifies replacement decisions.

Cons

• Open drip proof construction limits installation to relatively clean, dry locations rather than harsh or wet sites.
• Single phase 230V and specific rotation (CCW) mean buyers must confirm compatibility with their compressor before purchase.

Specifications

Brand	Cuilvu
Horsepower	5 HP
Voltage	230V single phase
Speed	3450 RPM
Shaft diameter	7/8' keyed
Shaft length	2.25'
Enclosure / IP	ODP / IP23

Our Verdict

The Cuilvu 5 HP 3450 RPM single phase motor is a solid, value-oriented choice for workshop and light commercial compressors that need reliable continuous duty performance. Buyers who operate in clean, ventilated spaces will appreciate the efficient cooling, durable rolled steel frame, and standard shaft dimensions that simplify installation.

Frequently Asked Questions

Is this motor compatible with most single-phase compressors?
Yes, provided the compressor accepts a 230V single phase supply, a 7/8' keyed shaft, and CCW rotation; confirm rated current and mounting before installation.

Can this motor be used outdoors?
Not recommended for wet or dusty outdoor locations because the ODP/IP23 rating is best for relatively clean, dry environments.

Does it include thermal protection?
The motor is equipped with a protector designed for compressor applications to help prevent overheating during continuous duty.