Castair I71CUC1-S: 7.5 HP Single-Phase Industrial Compressor, Cube Pump, 32.4 CFM at 895 RPM
The Castair I71CUC1-S is a 7.5 horsepower, single-phase industrial reciprocating air compressor built around Castair's cube pump (CUC) configuration, running at 895 RPM with 32.4 CFM free air delivery. The cube pump designation refers to the pump head geometry — a compact, square-profile pump design that differs physically from the standard cylindrical pump configuration used in the I718 series, while delivering the same performance specs as the C1 pump class.
Like all Castair industrial series compressors, this unit uses an all cast iron pump designed for slow-speed, long-life industrial service. Manufacturer specifications for the exact tank size, dimensions, and weight for this specific model are not published on the Castair public product page — contact us at 866-217-0063 for current availability and confirmed specifications.
Pump Specifications — Cube Pump C1 Configuration
- Pump type: Cube pump (CUC designation)
- Pump speed: 895 RPM
- Free air delivery: 32.4 CFM @ 0 PSI
- All cast iron construction: Cylinder, head, crankcase
- Tapered roller bearings: Both ends of crankshaft for superior support
- Precision steel connecting rods: Automotive-type insert bearings at crankshaft and wrist pin
- Disc and spring valves: Serviceable, efficient, reliable under industrial duty
- 4-ring pistons: Better sealing, reduced oil carryover
- Centrifugal unloader: Loadless startup every cycle
Motor and Power
- Horsepower: 7.5 HP
- Phase: Single-phase (1-phase)
- Voltage: 230V
- Motor: 1725 RPM industrial motor, 15% service factor or higher
I71CUC1-S vs. I71CUC2-S
Both models are 7.5 HP single-phase cube pump configurations. The C1 (I71CUC1-S) runs at 895 RPM with 32.4 CFM. The C2 (I71CUC2-S) runs at 585 RPM with 35.0 CFM — slower, quieter, and higher output at the cost of a heavier pump. The choice follows the same logic as the standard I718 series: C1 for a lighter installation, C2 for quieter operation and more CFM headroom.
Technical Specifications
- Model: I71CUC1-S
- Horsepower: 7.5 HP
- Phase: Single-phase (1-phase)
- Voltage: 230V
- Pump type: Cube pump (CUC), C1 configuration
- Pump RPM: 895
- Free air delivery (CFM @ 0 PSI): 32.4 CFM
- Tank size, dimensions, weight: Contact us at 866-217-0063 for confirmed data
Why Buy From Air Compressor Factory Direct?
The cube pump configuration is a specialty item in the Castair lineup, and we can confirm current availability, exact specifications, and whether this configuration makes sense for your installation. Free shipping on qualifying orders. Free tech support. Full manufacturer warranty on every Castair industrial unit.
Call 866-217-0063 for quick answers and help!
