ABAC AS-7.5501BM 7.5 HP Rotary Screw Air Compressor - Base Mount, 150 PSI, 27.1 CFM, 67 dBA

The ABAC AS-7.5501BM is a 7.5 HP base mount rotary screw air compressor built for shops that run air continuously rather than in bursts. It delivers 27.1 CFM at 150 PSI and runs at 67 dBA, quiet enough to sit in the work area instead of a separate compressor room. The higher pressure setting suits tools and equipment that need more than a standard 125 PSI line. Base mount means the unit ships without a receiver, so you plumb it into an air tank you already own or size a tank to the job. At 360 lbs in a 32 x 24 x 40 in cabinet it takes about as much floor as a two drawer file cabinet. Choose 230V single-phase (AS-7.5501BM) or 208-230-460V three-phase (AS-7.5503BM).

Key specifications

• Models: AS-7.5501BM (part number 4152044118) and AS-7.5503BM (part number 4152043886)
• Motor: 7.5 HP
• Air delivery: 27.1 CFM
• Working pressure: 150 PSI
• Noise level: 67 dBA
• Mounting: base mount, no receiver
• Power supply: 230/1/60 or 208-230-460/3/60
• Weight: 360 lbs
• Dimensions: 32 x 24 x 40 in
• Fully integrated aluminum block air end with vertical oil separation technology
• Digital controller with menu driven operation and programmed maintenance
• Brand: ABAC, part of the Atlas Copco group

CFM measured per ISO 1217 Annex C. Noise measured per ISO 2151:2004 using ISO 9614/2.

Why a screw instead of another piston

A rotary screw is rated for 100 percent duty, so it holds a steady line pressure through a full shift instead of recovering between jobs. That is the reason to move off a piston machine that is cycling hard, running hot and filling the room with noise. The AS-B air end is a fully integrated aluminum block with vertical oil separation, and ABAC pairs it with an energy efficient motor and a digital controller that handles programmed maintenance, so the service schedule is on the panel rather than on a clipboard.

How it compares

Within the AS-B 5 to 20 HP range the pressure, the airflow and the mounting all move independently. The AS-7.5251BM is the same machine set for 125 PSI, which trades pressure for airflow at 30.5 CFM in the identical 360 lb cabinet. Stepping down, the AS-5501BM holds the same 150 PSI on 5 HP at 17.4 CFM and a quieter 63 dBA. Stepping up, the AS-10503BM reaches 34.1 CFM at 150 PSI and 69 dBA. If you do not already own a receiver, the AS-7.5501TM7 puts the same air end on a 71 gallon tank, and the AS-7.5501TMD7 adds an integrated dryer in the same package. Pick on CFM first, then on pressure, then on whether you want the tank and the dryer included.

Typical applications

Automotive service bays, tire shops, small production and fabrication floors, cabinet and woodworking shops, and any operation where a piston compressor is cycling too hard to keep up. At 27.1 CFM it will keep several air ratchets, a sander and a blow off station fed through a full shift. The 150 PSI setting matters where a long pipe run, a high pressure impact tool or a piece of production equipment needs headroom above the usual 125 PSI shop line. At 67 dBA it is quiet enough to leave near the point of use, which saves the piping run a separate compressor room would cost.

What to pair it with

Base mount is the starting point for a modular system. Size a receiver to your demand and pipe it downstream of the compressor, then add moisture control if the air goes to paint, tires or anything that hates water. At 27.1 CFM the ABAC COOL 35 refrigerated air dryer is the matching size, and it runs on 115V so it plugs in beside the compressor without new wiring. See the rest of the rotary screw air compressors and the full refrigerated air dryer range. Call us with your tool list and duty cycle and we will confirm receiver sizing, connection sizes and installation clearances before you pipe it in.