Air-Max Spares & Service

Customized Solutions

🔍 What Is Air-End Rebuilding?

The air-end is the heart of a screw compressor—a precision-assembled rotor unit that compresses air. Over time, these rotors and bearings degrade due to:

• Normal wear and tear

• High-temperature operations

• Inadequate lubrication

• Ingestion of contaminants

• Misalignment or vibration issues

Rebuilding the air-end restores the unit's efficiency, pressure output, and operational smoothness—at a fraction of the cost of a new assembly.

At Air-Max Spares and Service, we follow a structured and quality-driven process for every air-end unit that enters our workshop.

• Full visual & mechanical inspection

• Rotor clearance measurement

• Shaft run-out analysis

• Bearing & seal condition assessment

• Vibration and noise checks

• Complete dismantling of the rotor assembly

• Ultrasonic or chemical cleaning of rotor and housing

• Shaft journal cleaning and preparation

• Bearing seat rectification

• Housing or cover bore re-machining (if required)

• Rotor re-profiling or polishing

• Seal land machining

• High-precision bearing installation (SKF/FAG/NTN equivalents)

• Replacement of seals, O-rings, shims, gaskets, spacers

• Rotor balancing and alignment

• Reassembly using OEM torque specifications

• Rotor end-play and axial float measurement

• Oil testing (if applicable)

• Trial run and noise-level verification

• Detailed inspection report provided

• Vibration level comparison (before vs. after)

• Guaranteed performance restoration

We also support on-site removal and re-installation, helping clients minimize compressor downtime and logistic delays.

Our rebuilt air-ends conform to stringent quality standards and performance benchmarks:

• Rotor balancing tolerance: ISO G2.5

• Bearing alignment: Within micron-level precision

• Surface finish & tolerance inspection using laser micrometers and dial gauges

• Oil leak-proof guarantee with triple seal protection

• Test run duration: Minimum 4-6 hours per unit

Each rebuilt unit is tagged with a unique job number for tracking and warranty support.

Here’s why industry leaders trust Air-Max Spares and Service for air-end rebuilding:

Rebuilding costs are typically 40%–70% less than purchasing a new air-end.

Standard rebuilds completed in 5–10 working days (depending on condition and complexity).

Rebuilt air-ends can add 20,000 to 30,000 hours to your compressor’s life cycle.

Avoid waste and reduce carbon footprint by reusing your original rotor assembly.

Handled by skilled technicians with decades of combined experience in screw compressor systems.