Collection: Compressors - Rotary / Screw

Cast Air Rotary Screw Air Compressors — Built for Shops That Run All Day

If your rotary screw air compressor is running four, six, or eight hours a day, a piston machine isn't the right tool for the job. Cast Air's rotary screw lineup — 5 HP through 30 HP — is rated at 100% duty cycle, meaning you can run them continuously without heat buildup or premature wear killing your compressor. Oil-injected twin-screw design keeps operating temperatures low and noise levels down compared to reciprocating units, which matters when the machine sits twenty feet from your service bays.

Available in 230V and 460V 3-phase configurations, these units pair with horizontal or vertical ASME-rated 120-gallon tanks depending on your floor plan. If you're running a production line, a large fleet shop, or any facility where demand doesn't let up, the rotary screw is the right call. That said, if your compressor sits idle half the day, our Cast Air industrial-series piston compressors deliver the same cast iron durability at a lower upfront cost — worth a look for intermittent-duty applications.

As an authorized Cast Air dealer, we stock and support the full rotary screw range. Cast Air has been manufacturing in Spicer, Minnesota since 1991 — family-owned, all cast iron construction, no offshore shortcuts. Questions about sizing, voltage configuration, or tank orientation for your space? Call us at 866-217-0063 — we'll help you spec the right unit the first time.