Castair 5HP Rotary Screw Base Mount Compressor 460V — R43BMP60-460
The Castair R43BMP60-460 is a 5-horsepower, 3-phase, 460-volt rotary screw compressor in base mount configuration — the compressor assembly without a tank, paired with a 60-gallon receiver. Base mount means you're getting the air end, motor, belt drive, controls, and mounting frame. If your facility runs 460V 3-phase power and you have an existing receiver tank or need to replace a compressor head on an existing system, this is how you get rotary screw output without paying for a tank you already have.
Note: The R43BMP60-460 was not listed individually on Castair's website at time of writing. Specifications below are based on Castair's confirmed rotary screw product line and model number conventions. Contact 866-217-0063 for the current data sheet.
5HP Output — What It Handles in a Real Shop
Based on Castair's published specs for the 5HP rotary screw line, expect approximately 20 CFM at 100 PSI from a 5HP rotary screw air end. In practice, 20 CFM supports:
- 1-inch impact wrench: approximately 10-25 CFM depending on model and duty
- 3/8-inch or 1/2-inch impact: 3-8 CFM
- Air ratchet: 4-6 CFM
- DA sander: 12-20 CFM
- HVLP spray gun: 9-14 CFM
One tech running a 1-inch impact intermittently is manageable. Two techs running heavy air tools simultaneously will challenge a 5HP unit. If that's your situation, step up to 7.5HP.
460V Base Mount — Why This Configuration
- 460V 3-phase facility: If your building is wired for 460V, this is the correct voltage variant. Do not order the 230V unit for a 460V panel.
- Half the amperage of 230V: At 460V, the motor draws approximately half the amps for the same 5HP output. Smaller wire gauge required, less voltage drop on long runs.
- No tank included: Base mount ships without a receiver. You supply or connect to an existing tank. If you need a complete self-contained unit, the R538HP75-460 (5HP, 80-gal horizontal, 460V) or R538VP75-460 (vertical) are the complete system options.
- System upgrade logic: If you have a 60-gallon or larger tank in good condition, replacing just the compressor head with a rotary screw base mount is more economical than buying a complete new system.
Castair Rotary Screw Build Quality
- 100% duty cycle: Rotary screw design means continuous operation — no piston heat buildup, no valve cycling limitations.
- Single solenoid control: Simple, field-repairable. No proprietary control boards, no lockout codes.
- Industrial 1725 RPM motor, full 15% service factor: Runs cool. Lasts longer than consumer-grade motors.
- Cast iron construction: All primary components in cast iron. Handles the thermal and mechanical stress of shop operation.
- Built-in air/oil separator with spin-on filter: Keeps oil out of the air system.
- Off-shelf V-belts with adjustable tensioner: Available at any industrial supply. No factory ordering required for basic maintenance.
- Air/oil lines in copper pipe: Heat-resistant, vibration-resistant, standard fittings.
- Air-cooled aftercooler/oil cooler standard: Removable for cleaning. Controls oil temperature and reduces moisture carryover.
- Factory-filled with Cast-Lube synthetic oil: 4,000-hour or one-year change interval.
- Hour meter standard: Accurate maintenance scheduling by actual run hours.
- 10-minute auto shutdown timer: Cuts power when no air is demanded, saving electricity.
- Pressure options: 135 PSI standard, 150 or 175 PSI optional.
- 2-year warranty on air end and electric motor
Available Configurations — 5HP 3-Phase Rotary Screw
- R538VP75 (5HP, 3-Phase 230V, 80 Gal Vertical): 20 CFM @ 100 PSI — 470 lbs — 34×26×70"
- R538HP75 (5HP, 3-Phase 230V, 80 Gal Horizontal): 20 CFM @ 100 PSI — 470 lbs — 64×32×44"
- R538VP75-460 (5HP, 3-Phase 460V, 80 Gal Vertical): 20 CFM @ 100 PSI — 470 lbs
- R538HP75-460 (5HP, 3-Phase 460V, 80 Gal Horizontal): 20 CFM @ 100 PSI — 470 lbs
- R43BMP60-460 (this unit): Base mount, 460V, pair with 60-gallon receiver
When Does a Shop Need This vs. Stepping Up or Down?
- Right for: 460V 3-phase shop with an existing receiver tank needing a rotary screw head upgrade. One-to-two bay operation with moderate air demand.
- Step up to 7.5HP if: Two or more techs regularly run air tools simultaneously. The 7.5HP 3-phase units deliver 31 CFM @ 100 PSI — 55% more output than 5HP.
- Buy the complete system (R538HP75-460 or R538VP75-460) if: You don't have a usable existing tank. Base mount saves money only when you already have the tank.
- Step down to 3HP base mount if: Your actual air demand is genuinely light — one tech, intermittent use only.
Technical Specifications
- Model: R43BMP60-460
- Horsepower: 5 HP
- Phase: 3-Phase
- Voltage: 460V
- Configuration: Base mount (no tank)
- Suggested Receiver: 60 gallon
- Expected CFM: Approximately 20 CFM @ 100 PSI (based on 5HP rotary screw line — confirm with manufacturer)
- Compressor Type: Rotary screw
- Duty Cycle: 100%
- Standard Pressure: 135 PSI (150 or 175 PSI available)
- Lubrication: Oil-injected, synthetic lubricant
- Drive: Belt drive, standard V-belts
- Motor Speed: 1725 RPM industrial motor
- Controls: Single solenoid, pre-wired magnetic starter, hour meter, 10-minute auto shutdown
- Warranty: 2-year on air end and electric motor
- Manufacturer: Castair (Spicer, Minnesota)
Exact CFM, dimensions, and weight pending manufacturer confirmation. Call 866-217-0063 for current data sheet.
What's in the Box
- Castair rotary screw compressor assembly (air end, motor, belt drive, base frame)
- Pre-wired magnetic starter and controls for 460V 3-phase
- Air/oil separator with spin-on filter
- Air-cooled aftercooler/oil cooler
- Hour meter
- Pre-filled with Cast-Lube synthetic oil
Tank not included. 60-gallon receiver sold separately or connect to existing tank.
Why Buy From Air Compressor Factory Direct?
- Castair specialists: We know the 460V variants and base mount configurations inside out
- Free shipping on qualifying orders
- Free technical support: Call 866-217-0063 — confirm your voltage, tank size, and CFM needs before ordering
- Full manufacturer warranty honored and supported
- Honest guidance: If the complete system is a better fit for your situation, we'll tell you
Call 866-217-0063 for quick answers and help!
