{"product_id":"castair-5hp-1-phase-rotary-screw-air-compressor-80-gallon-horizontal-r518hp75","title":"Castair 5HP 1 Phase Rotary Screw Air Compressor 80 Gallon Horizontal R518HP75","description":"\u003ch2\u003eCastair 5HP 1-Phase Rotary Screw Air Compressor 80 Gallon Horizontal — R518HP75\u003c\/h2\u003e\n\n\u003cp\u003eThe Castair R518HP75 is a 5-horsepower, single-phase, 80-gallon horizontal rotary screw air compressor delivering 20 CFM at 100 PSI. It weighs 480 pounds and measures 64 inches long by 32 inches wide by 44 inches tall. Single-phase power means a standard 230V single-phase circuit — no 3-phase service required, which opens this unit up to smaller shops, residential garages, and facilities where 3-phase power simply isn't available. The horizontal tank keeps the overall height to 44 inches, making this a practical fit for shops with lower ceilings or wall mounting constraints.\u003c\/p\u003e\n\n\u003ch3\u003eWho Runs This Compressor\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo-bay automotive shop\u003c\/strong\u003e running impacts, ratchets, and blow guns — one or two techs working simultaneously within the 20 CFM output range\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTire and alignment shop\u003c\/strong\u003e using air tools throughout the day with continuous-duty demand that would burn up a piston compressor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody shop\u003c\/strong\u003e running HVLP spray guns (9-14 CFM each) or DA sanders (12-20 CFM)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmall fabrication shop\u003c\/strong\u003e running air tools from a single-phase panel where 3-phase isn't an option\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResidential or small commercial garage\u003c\/strong\u003e needing real rotary screw reliability without the requirement for 3-phase service\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e20 CFM at 100 PSI — What That Covers\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1-inch impact wrench:\u003c\/strong\u003e 10-25 CFM — a heavy 1\" impact at full continuous load will challenge this unit; intermittent use works fine\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\/2-inch impact:\u003c\/strong\u003e 4-8 CFM — comfortable, leaves headroom for other tools running simultaneously\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDA sander:\u003c\/strong\u003e 12-20 CFM — one sander running is fine; two simultaneously will draw the full 20 CFM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHVLP spray gun:\u003c\/strong\u003e 9-14 CFM — one gun painting comfortably at the full tank capacity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAir ratchet:\u003c\/strong\u003e 4-6 CFM — multiple ratchets can run simultaneously with this unit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTire inflation and general shop tools:\u003c\/strong\u003e Well within capacity\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHorizontal Tank — When This Layout Works\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e44-inch height:\u003c\/strong\u003e The horizontal configuration stands 44 inches tall versus 70 inches for the vertical version (R518VP75). If your ceiling height is a constraint, horizontal is the choice.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e64-inch length:\u003c\/strong\u003e The tradeoff is floor length. Measure your available wall space — you need roughly 5.5 feet of clear length plus service clearance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStable footprint:\u003c\/strong\u003e The longer, lower profile has a low center of gravity. Suitable for locations where vertical units might feel top-heavy.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVertical alternative:\u003c\/strong\u003e R518VP75 is 34×26×70\" and weighs the same 480 lbs. Same output, smaller floor footprint but taller.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy Rotary Screw Over Piston at 5HP\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e100% duty cycle:\u003c\/strong\u003e A 5HP piston compressor typically runs at 50-75% duty cycle. This rotary screw runs continuously without overheating — critical for production-pace shops.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConsistent pressure:\u003c\/strong\u003e Rotary screw output is steady. Piston units cycle between cut-in and cut-out pressure, causing noticeable pressure swings at the tool.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuieter operation:\u003c\/strong\u003e Rotary screws at 1725 RPM run significantly quieter than piston compressors at 3450 RPM for comparable output.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLower long-term maintenance cost:\u003c\/strong\u003e No pistons, rings, or valves to wear out. Maintenance is oil, filters, and separator changes on a schedule.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCastair Build Quality — What Separates This From Import Brands\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCast iron throughout:\u003c\/strong\u003e Castair builds with cast iron — not aluminum. Handles the thermal cycling of continuous-duty operation in a real shop environment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial 1725 RPM motor with full 15% service factor:\u003c\/strong\u003e Built for commercial use. The service factor means it can handle occasional overload without damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle solenoid air end control:\u003c\/strong\u003e No computers, no lockout codes, no proprietary control boards. One solenoid operates the air end. When something needs attention, any competent tech can work on it.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy-to-read pressure and temperature gauges standard:\u003c\/strong\u003e Analog gauges on the panel — no navigating menus to check operating conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh pressure and dual high temperature shutdown standard:\u003c\/strong\u003e The unit protects itself. Both a high-pressure cutoff and dual high-temperature shutdowns are built in — not options.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFactory-filled with Cast-Lube synthetic oil:\u003c\/strong\u003e 4,000-hour or one-year change interval. Ships ready to connect and run.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-in air\/oil separator with spin-on filter:\u003c\/strong\u003e Keeps oil out of the compressed air stream. Standard spin-on format — easy replacement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOff-shelf V-belts with adjustable tensioner:\u003c\/strong\u003e Standard belts from any industrial or farm supply. No proprietary belt ordering from the manufacturer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAir\/oil lines in copper pipe:\u003c\/strong\u003e Not plastic hose. Copper handles heat and vibration indefinitely.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAir-cooled aftercooler\/oil cooler standard:\u003c\/strong\u003e Removable for cleaning. Cools compressed air to reduce moisture carryover and keeps oil temperature controlled.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHour meter standard:\u003c\/strong\u003e Track actual runtime for maintenance scheduling. Know exactly when oil and filter changes are due.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e10-minute auto shutdown timer:\u003c\/strong\u003e If no air is drawn for 10 minutes, the unit shuts off automatically. Saves electricity on slow days or overnight.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eASME-rated 80-gallon tank:\u003c\/strong\u003e Code-compliant. Required for most commercial insurance and inspection requirements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuality name-brand magnetic starter, mounted and wired:\u003c\/strong\u003e Connect incoming 230V single-phase power — that's the installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePressure range options:\u003c\/strong\u003e Standard 135 PSI. Can be ordered at 150 or 175 PSI.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e2-year warranty on air end, electric motor, and tank\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eMade in Spicer, Minnesota\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAvailable Configurations — Castair 5HP Rotary Screw\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eR518HP75 (this unit):\u003c\/strong\u003e 5HP, 1-Phase, 80 Gal Horizontal — 20 CFM @ 100 PSI — 64×32×44\" — 480 lbs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR518VP75:\u003c\/strong\u003e 5HP, 1-Phase, 80 Gal Vertical — 20 CFM @ 100 PSI — 34×26×70\" — 480 lbs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR518HG11:\u003c\/strong\u003e 5HP, 1-Phase, 80 Gal Horizontal with G11 air end (contact for specs and pricing)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR518VG11:\u003c\/strong\u003e 5HP, 1-Phase, 80 Gal Vertical with G11 air end\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3-Phase 230V:\u003c\/strong\u003e R538HP75 — same layout, 3-phase 230V motor — 470 lbs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3-Phase 460V:\u003c\/strong\u003e R538HP75-460 — 3-phase 460V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStep up:\u003c\/strong\u003e R718HP75 — 7.5HP, 1-Phase, 80 Gal Horizontal — 31 CFM @ 100 PSI — 555 lbs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhen Does a Shop Need This vs. Stepping Up or Down?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRight for:\u003c\/strong\u003e Single-phase power availability, 1-2 bay shop, techs running impacts and ratchets through a full shift. The 20 CFM at 100 PSI handles steady single-tech demand without strain.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStep up to 7.5HP (R718HP75) if:\u003c\/strong\u003e Two or more techs consistently run air tools simultaneously, or you're doing continuous heavy-demand work like DA sanding production or continuous spray painting. The 7.5HP unit delivers 31 CFM @ 100 PSI — 55% more output.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStep down if:\u003c\/strong\u003e Your actual use is intermittent, light-duty air tool work. A Castair commercial piston compressor may be a lower-cost option for truly light-duty use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChoose 3-phase if:\u003c\/strong\u003e Your facility has 3-phase service. The 3-phase motor (R538HP75) starts smoother, draws less amperage, and has simpler motor construction.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChoose vertical (R518VP75) if:\u003c\/strong\u003e Floor space is limited and ceiling clearance is adequate — same output, 34\" wide vs. 64\" long.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e R518HP75\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHorsepower:\u003c\/strong\u003e 5 HP\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePhase:\u003c\/strong\u003e 1-Phase\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 230V (single-phase standard)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTank:\u003c\/strong\u003e 80 gallon, horizontal, ASME-rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCFM @ 100 PSI:\u003c\/strong\u003e 20\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions (L×W×H):\u003c\/strong\u003e 64\" × 32\" × 44\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 480 lbs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompressor Type:\u003c\/strong\u003e Rotary screw\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDuty Cycle:\u003c\/strong\u003e 100%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Pressure:\u003c\/strong\u003e 135 PSI (150 or 175 PSI optional)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMotor Speed:\u003c\/strong\u003e 1725 RPM industrial, full 15% service factor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrive:\u003c\/strong\u003e Belt drive, off-shelf V-belts with adjustable tensioner\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLubrication:\u003c\/strong\u003e Oil-injected, Cast-Lube synthetic, 4,000-hour\/1-year interval\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControls:\u003c\/strong\u003e Single solenoid, pre-wired magnetic starter, analog pressure\/temp gauges, hour meter, 10-minute auto shutdown\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShutdowns:\u003c\/strong\u003e High pressure, dual high temperature (standard)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 2-year on air end, electric motor, and tank\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Castair, Inc. (Spicer, Minnesota)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCastair rotary screw compressor assembly mounted on 80-gallon horizontal ASME tank\u003c\/li\u003e\n\u003cli\u003ePre-wired magnetic starter and controls (connect incoming 230V 1-phase power)\u003c\/li\u003e\n\u003cli\u003eAir\/oil separator with spin-on filter\u003c\/li\u003e\n\u003cli\u003eAir-cooled aftercooler\/oil cooler\u003c\/li\u003e\n\u003cli\u003eHour meter\u003c\/li\u003e\n\u003cli\u003ePre-filled with Cast-Lube synthetic oil\u003c\/li\u003e\n\u003cli\u003ePressure and temperature gauges installed\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRecommended Maintenance Accessories\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePreventative maintenance kit (MKP75):\u003c\/strong\u003e 2 air filters, 4 oil filters, 1 separator filter, 5 gallons Cast-Lube synthetic oil — saves 10% versus buying individually\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElectronic auto tank drain (SDV03M):\u003c\/strong\u003e Eliminates manual draining; purges condensate automatically\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVibration pads VP1004:\u003c\/strong\u003e 4\"×4\"×1\" set of 4 — reduces vibration transmission to floor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBall valve BV75 (3\/4\"):\u003c\/strong\u003e Full-flow shutoff for the outlet line\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMetal flex hose VA075 (3\/4\" NPT × 18\"):\u003c\/strong\u003e Isolates the tank from the plumbing, absorbs vibration\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy Buy From Air Compressor Factory Direct?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCastair specialist since day one:\u003c\/strong\u003e We know this line, the accessories that pair with it, and the maintenance kits that keep it running\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e on qualifying orders\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree technical support:\u003c\/strong\u003e Call 866-217-0063 — someone who understands rotary screw compressors answers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull manufacturer warranty\u003c\/strong\u003e honored and supported\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHonest upgrade guidance:\u003c\/strong\u003e If 7.5HP is what your shop actually needs, we'll tell you before you order the 5HP\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eCall 866-217-0063 for quick answers and help!\u003c\/strong\u003e\u003c\/p\u003e","brand":"Cast Air","offers":[{"title":"Default Title","offer_id":53342581915861,"sku":"R518HP75","price":18428.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0622\/8466\/0949\/files\/Logo1_0aee0034-ea40-4bd7-88af-7e8776b71a8c.png?v=1772652839","url":"https:\/\/aircompressorfactorydirect.com\/products\/castair-5hp-1-phase-rotary-screw-air-compressor-80-gallon-horizontal-r518hp75","provider":"Air Compressor Factory Direct","version":"1.0","type":"link"}