FAQs

AIREND REBUILDING

Air end Rebuild include the installation of new bearing gaskets, seals, remetalizing and grinding of shafts and rotors, repair to the front and rear housings when necessary, and repair of the sealing strips and oil pump. On Ingersoll Rand, Sullair, Gardener Denver, Compair and Atlas Copco encapsulated air ends, we will provide new filters and separators. On direct drive units, we service the motor, clean winding, bakeout, and install new bearings and seals. We are specialized in providing faster turnaround for an average air end.

Hadan Contracting & Industrial Services rebuilds adhere to strict tolerances, use the highest standards to ensure quality, and are backed by a Hadan warranty on equipment repaired and defects in materials replaced as well as workmanship for a period of twelve (12) months.

AIREND FREQUENTLY ASKED QUESTIONS (FAQs)

How many hours of service can I expect to get from a rotary screw air end?

A rotary screw air end is a precision piece of equipment that has running tolerances in the thousandths, most units will provide an average of 25,000 to 50,000 hours, some of the older units will run into the 100,000-hour range.

What kind of maintenance schedule should I follow with my air end?

Find a good service company and have them setup your unit on a regular maintenance schedule. Change oil, oil filter, and air filter on a regular basis. Once a year is not enough. The compressor is constantly taking in contaminates with the air. The only way to get rid of harmful contaminates is to change the oil.

What temperature should my compressor be running at?

Most compressors are designed to run 100° degrees above ambient. That makes the average temperature between 175° to 200° maximum. Anything above 200° and you'll be shortening the life of the unit. If you find that your unit is running hot and you can't bring the temperature down, you'll need to add a cooler.

What could cause my air end to fail?

There are numerous causes, contaminated oil, high running temperatures, and one overlooked area – motor bearings. A percentage of air ends we receive for remanufacturing fail because the motor bearings lost their trueness, placing stress on the front air end bearings. These bearings are not made to handle this kind of movement. We recommend that the motor bearings be done every 2 to 3 years on 24hrs operating units and every 5 years for the standards. Again, a little preventive maintenance can save you thousands in the long run.

What kind of oil should I use?

Use a good quality synthetic oil, today’s rotary screws run between 175 to 200 degrees, synthetic oil is the only one that will take the heat and not varnish. Mineral base and turbine oils will varnish, which will lead to overheating problems.

Maintenance

We can’t stress filter and oil changes enough. A well-maintained unit will provide reliability, energy savings and peace of mind.