Need help with installation? Our AI assistant has read this installation manual and can help you find the right page and walk you through each step.
The EMAX 5HP 80-Gallon 2-Stage Inline Industrial Air Compressor is engineered for serious compressed air demand and built to deliver dependable performance in professional environments. Combining a rugged 5 HP industrial motor, two-stage inline pressure-lubricated pump, 80-gallon vertical ASME-certified tank, and 19 CFM at 100 PSI, this compressor provides the airflow, durability, and efficiency required for automotive repair shops, fabrication facilities, manufacturing operations, agricultural applications, and commercial workshops.
Engineered for up to 60,000 hours of service life based on B-10 bearing life with proper maintenance, this compressor features a heavy-duty all-cast-iron, pressure-lubricated pump designed to provide superior protection for critical internal components. The two-stage design delivers dependable compressed air for demanding pneumatic tools and equipment while supporting long-term professional use.
Heavy-Duty 5HP Industrial Motor
A powerful 5 HP, 1740 RPM industrial-duty electric motor provides reliable power while operating at a lower speed than many higher-RPM compressor motors. This helps reduce heat, operating noise, and component wear, contributing to longer motor life, reduced maintenance, and improved overall compressor reliability.
80-Gallon ASME-Certified Ring Base Tank
The heavy-duty 80-gallon vertical ASME-certified ring base air tank provides substantial compressed air storage for demanding applications. Increased storage capacity helps reduce compressor cycling, improve system efficiency, and maintain more consistent air delivery. The ring base provides enhanced stability, while the durable powder-coated finish helps protect against corrosion in demanding shop environments.
Premium industrial components include a high-quality Condor pressure switch, heavy-duty 18-gauge steel belt guard, and large 3/4-inch air outlet designed to provide unrestricted airflow to compatible pneumatic tools and equipment.
Silent Air™ Technology ~ Patented Noise Suppression System – Up to 50% Quieter
EMAX Silent Air™ Technology is designed to reduce compressor intake noise, one of the loudest sources of sound generated by a reciprocating air compressor. The patented system channels incoming air through specially engineered baffle chambers, helping provide up to 50% quieter perceived operation while maintaining the airflow required for demanding professional applications.
Unlike fully enclosed compressor cabinet systems that can restrict access to critical components, the Silent Air™ system provides effective noise suppression while maintaining convenient accessibility for routine inspection, maintenance, and service.
Advanced Air Filtration
Silent Air™ combines noise reduction with enhanced intake filtration to help protect the compressor and support dependable long-term performance.
Noise-reducing baffle plates help suppress compressor intake noise.
High-capacity filter media helps capture airborne contaminants.
Provides up to 1000% more filtration compared with standard filtration setups.
Pressure-Lubricated 2-Stage Pump ~ Maximum Protection for Critical Components
The EMAX pressure-lubricated compressor pump is engineered to provide continuous, controlled oil delivery to critical bearing and wear points. A gear-driven oil pump generates positive oil pressure, continuously circulating lubricant throughout the pump to help reduce friction, control operating temperatures, and minimize internal wear.
Unlike traditional splash lubrication, pressure lubrication delivers oil directly where it is needed, making it particularly well suited for demanding commercial and heavy-duty compressor applications where long-term durability is essential.
100% Cast-Iron Pump Construction
Major pump components are constructed from heavy-duty cast iron to provide the rigidity, strength, and durability required for professional compressor service.
Cast-iron crankcase
Cast-iron cylinder heads
Cast-iron cylinders
Cast-iron connecting rods
Cast-iron crankshaft
Cast-iron high-pressure piston
Rifle-Drilled Oil Passages
The crankshaft and connecting rods are rifle-drilled to provide direct oil flow to critical wear points, including bearings and other high-friction components. This targeted lubrication helps maintain a consistent protective oil film where it matters most, reducing friction, heat, and premature component wear.
Spin-On Automotive-Style Oil Filter
A spin-on automotive-style oil filter helps keep circulating lubricant clean by removing contaminants before they reach critical internal components. The familiar spin-on design also simplifies routine filter replacement during scheduled compressor maintenance.
An integrated analog oil pressure gauge allows operators to monitor lubrication system pressure, providing convenient confirmation that the pressure-lubrication system is operating properly.
Four-Ring Piston Design
The compressor pump utilizes a four-ring piston design with precision-engineered overlap rings to improve cylinder sealing. This configuration helps minimize compression loss and reduce oil carryover, supporting efficient compressor performance and long-term reliability under demanding operating conditions.
High-Quality Pump Gaskets
High-quality non-oil-absorbent gaskets help maintain dependable sealing throughout the pump while minimizing the potential for oil leakage. Improved sealing helps reduce maintenance requirements and contributes to the compressor’s long-term efficiency and durability.
Optional Head Unloaders
Optional head unloaders are available for constant-run applications where the compressor operates for extended periods. Head unloaders relieve the intake valve during unloaded operation, helping improve pump cooling and reduce unnecessary wear under demanding workloads. This makes them particularly beneficial for applications requiring frequent or continuous compressed air.
Heavy-Duty 16" Cast-Iron Flywheel
The 5 HP compressor pump features a 16-inch heavy-duty cast-iron flywheel engineered to improve efficiency, power transfer, and cooling. The increased flywheel mass stores greater kinetic energy during operation, helping maintain smooth compressor performance while reducing peak motor demand.
The flywheel incorporates six large cooling fins designed to move air across the compressor pump and improve heat dissipation. Better pump cooling helps control operating temperatures and supports longer component life during demanding compressor duty cycles.
Belt Drive | Dual B-Style V-Belt Design ~ Power You Can Rely On
The 5 HP compressor utilizes two B-style groove belts to provide dependable power transfer between the industrial motor and compressor pump. Compared with narrow single A-width belt systems, the wider multi-belt design provides greater contact area and improved grip.
Dual B-style belts provide increased surface area for dependable power transfer.
Reduced belt tension helps minimize strain on motor and compressor bearings.
Greater contact area helps reduce belt slippage and premature wear.
Lower noise and vibration promotes smoother compressor operation.
Improved load distribution helps extend belt and drive-system service life.
The result is a durable, efficient, and low-maintenance V-belt drive system engineered for thousands of hours of dependable professional operation.
Built for Serious Professional Air Demand
With its combination of a 5 HP industrial motor, 19 CFM at 100 PSI, 80-gallon ASME-certified tank, two-stage pressure-lubricated cast-iron pump, dual B-style belts, and Silent Air™ Technology, this EMAX compressor provides a professional compressed air solution built around durability, efficiency, and long service life.
Built and performance-tested in Ohio, EMAX compressors are engineered to provide the reliability, durability, and long-term value professional operations depend on. Backed by a strong manufacturer warranty, the EMAX 5HP 80-Gallon 2-Stage Inline Industrial Air Compressor is designed to keep demanding shops and commercial facilities supplied with dependable compressed air day after day.
See What SilentAir Techhnology Is
California Prop 65 Warning: Proposition 65 requires warnings on products that contain certain metals/chemicals that the State of California has determined may cause cancer and/or birth defects or other reproductive harm, if those products expose consumers to such chemicals above certain threshold levels that are designed to protect public health. For more information go to www.P65Warnings.ca.gov
US Dollars
California Prop 65 Warning: Proposition 65 requires warnings on products that contain certain metals/chemicals that the State of California has determined may cause cancer and/or birth defects or other reproductive harm, if those products expose consumers to such chemicals above certain threshold levels that are designed to protect public health. For more information go to 