The Rolair 5715K17-0001 Twin Tank 9 Gallon Electric Belt Drive Compressor is built for contractors who need dependable air delivery for trim work, finish work, and other pneumatic tool tasks on the job. This is a twin-tank electric belt-drive air compressor designed for powering pneumatic nailers and similar air tools. Model Number: 5715K17-0001. If you need more output than a small portable pancake compressor can give you, but you still want a machine you can move around the site, this is the kind of setup that makes sense.

The headline numbers tell the story. You get a 9 gallon twin-tank layout, 7.3 CFM at 90 PSI, and a maximum pressure rating of 135 PSI. In plain terms, that means better recovery and more usable air for repeated fastening work. It is specifically described as capable of running multiple trim or finish guns, which matters on punch lists, interior finish jobs, cabinet installs, and larger crews where one compressor may need to support more than one user.

Rolair built this unit around a single-stage, oil-lubricated pump with two cast-iron cylinders. That is not just a spec to pad the page. Cast iron and oil lubrication are the kinds of details buyers look for when they want long-term durability, stable operation, and a compressor that is meant to work rather than just inflate tires once in a while. The pump also uses splash-lubricated ball bearings, hardened steel valve plates, and aluminum alloy connecting rods, which points to a design focused on wear resistance and service life.

The 1.5 horsepower motor draws 17 amps on 115V power and runs at 1755 RPM. A lower-speed pump and quieter operation are both real jobsite advantages. Lower pump speed generally helps with durability and noise, and quieter operation matters when you are working indoors, in occupied spaces, or on remodeling jobs where a screaming compressor gets old fast. Rolair also includes thermal overload protection with manual reset, so the motor has added protection if it gets pushed too hard.

The twin side-by-side steel tank configuration gives the unit a low, stable profile in a horizontal operating position. That helps on uneven subfloors and active jobsites where equipment gets shifted around during the day. There is also a pressure gauge for monitoring output, and the unit operates between 110 and 135 PSI. When you are dialing in tools for finish fastening, having a clear pressure reference helps you avoid underdriving or overdriving fasteners.

From a practical standpoint, this compressor sits in a useful middle ground. It is much heavier and more substantial than a light-duty homeowner compressor, but it is still designed to move with you thanks to the wheeled design and handle. That makes it a solid fit for trim carpenters, remodeling crews, finish contractors, and serious users who want electric air power with better output and better longevity than entry-level portable units.

This Rolair air compressor is also a good choice for buyers who care about component quality more than flashy extras. The selling point here is not gimmicks. It is the combination of proven belt-drive compressor design, solid airflow, steel twin tanks, and heavy-duty internal components. If your work depends on pneumatic fastening and you want a compressor that is built to stay in rotation, that is where this machine earns its keep.

Rolair 5715K17-0001 Twin Tank 9 Gallon Electric Belt Drive Compressor for crews that actually use air all day

This is the kind of compressor you buy when you are done messing around with light-duty units that cannot keep up once the work starts.

• Who it's for: Trim carpenters, finish crews, remodelers, and contractors who need an electric air compressor with enough output to support steady pneumatic fastening.
• Why it stands out: The cast-iron, oil-lubricated belt-drive pump and 7.3 CFM at 90 PSI give it the durability and usable air delivery that separate pro-grade compressors from homeowner machines.
• Worth knowing: It is a serious machine at 174 pounds, so you are getting durability and capacity, not featherweight portability. If that tradeoff works for your jobs, this Rolair is a strong buy.