The CKMA24 is the 24 V version of ARB's single motor on-board compressor, for trucks, buses, tray tops and expedition vehicles running a 24 V system. Everything that makes the 12 V unit work is here unchanged: 3.08 CFM of free flow air, 100 psi, an IP55 sealed motor and a 50 percent duty cycle that ARB rates honestly at 30 minutes on and 30 minutes off.
What changes is the electrical side. At 24 V the compressor draws 7.1 A at free flow and 12.6 A at 29 psi, roughly half the current of the 12 V unit for the same air, which is one of the quiet advantages of a 24 V vehicle. It bolts to any flat surface through four drilled holes using the supplied backing plate as a template, and the body rotates 180 degrees in its bracket to fit tight spaces.
What's Included:
CKMA24 single motor 24 V compressor assembly with over-pressure safety valve
Mounting bracket and backing plate, which doubles as the drilling template
Washable sintered disc air filter assembly
Pressure switch and manifold hardware
Complete wiring loom with relay and illuminated ARB dash switch
Mounting bolts, washers and terminals
Features
24 V, Same Air 3.08 CFM free flow and 2.34 CFM at 29 psi, the same output as the 12 V unit, on a 24 V vehicle system.
Half The Current 7.1 A at free flow and 12.6 A at 29 psi, roughly half what the 12 V version pulls for the same air, which eases the wiring and the fusing.
Mounts Anywhere, Points Anywhere Four mounting holes drilled through the supplied backing plate template, and the body rotates 180 degrees in its bracket for engine bays, drawers and under tray spaces.
Everything In The Box Full wiring loom, relay, illuminated dash switch, pressure switch and hardware included, so the install needs no parts counter trips.
Sealed Against The Trail IP55 rated sealing keeps dust and water spray out of the motor, and the washable sintered filter is the only maintenance item.
Honest Duty Cycle ARB rates it at a 50 percent duty cycle, 30 minutes on and 30 minutes off, rather than quoting a burst figure it cannot sustain.
Fitment & Compatibility
Application
Fit
Any 24 V vehicle with a flat mounting surface roughly 8" x 4"
✓ Fits
ARB Air Locker air supply on a 24 V vehicle
✓ Fits, purpose designed
Tire inflation with an ARB inflation kit
✓ Fits
12 V vehicles
✗ Does not fit, use the CKMA12 instead
Fit guidance: This is the 24 V unit. Confirm your vehicle system voltage before ordering, because the only difference between this and the CKMA12 that matters to you is the one that will stop it working. It is a universal mount component, not a vehicle specific part, but universal does not mean no drill.
Specifications
Model: ARB High Output On-Board Air Compressor, single motor
Part Number: CKMA24
Voltage: 24 V DC
Free-Flow Air Delivery: 3.08 CFM (87.2 L/min)
Air Delivery at 29 psi: 2.34 CFM (65.9 L/min)
Maximum Pressure: 100 psi
Current Draw: 7.1 A at free flow, 12.6 A at 29 psi
Duty Cycle: 50%, rated 30 minutes on / 30 minutes off
Ingress Protection: IP55 (motor assembly)
Dimensions: 7.5"L x 3.9"W x 5.7"H
Product Weight: 7.7 lb
Thermal Protection: Internal overheat cut-out
Shipping Weight: 10 lb
Warranty: 3 years
UPC: 881348007261
Installation
Type: Bolt-on to a drilled flat surface; full electrical kit supplied · Time: 2 to 4 hours for a tidy engine bay install with switch wiring · Tools: Drill, socket set, crimper; basic 24 V wiring competence · Difficulty: Moderate
The supplied loom, relay and switch cover the electrical side. Pick a mounting spot away from exhaust heat and water spray, use the backing plate as the drilling template, and follow ARB's guide for the pressure switch plumbing.
Resources
Everything you need for your ARB On-Board Air Compressor, 24V Single Motor, 3.08 CFM, 100 psi, IP55, in one place.
Warranty. ARB covers this product with a 3-year unlimited-mileage warranty through ARB North America (Air Locker Inc., Auburn, WA), the term ARB publishes for it in its own product record. Wear items such as filter elements and seals fall under ARB's 1-year wear-item schedule. We describe ARB's warranty exactly as published and it is honored through any ARB-authorized dealer in the US.
Free shipping. This item ships free to the lower 48 states and typically arrives in 3 to 7 business days.
Inspect on delivery. Please inspect your order on arrival. If anything is damaged or missing, contact us right away and we will make it right.
About ARB
ARB started in 1975 in a Melbourne garage, when Tony Brown began building bull bars for the four-wheel drives crossing Australia's outback, and the company has grown into the largest 4x4 accessories maker in the southern hemisphere. Its engineering campus in Kilsyth, Victoria still designs and builds the products the brand is known for, and ARB now runs offices in the USA, Europe and the Middle East with an export network reaching more than 100 countries.
Air is one of the things ARB is best known for. The compressor line, the Air Locker system it was built to feed, and the fittings, hoses and gauges that tie them together are engineered as one system, which is why an ARB air part is specified by the same part numbers the factory uses. In North America ARB operates from Auburn, Washington as Air Locker Inc., backing every product with a US warranty program. Prestige Truck is an authorized ARB dealer. Every part we ship is a genuine US-market unit with full ARB North America warranty coverage.
The Compressor Range Explained
ARB's own walk through of how the single and twin, portable and on-board compressors differ, and which job each one is actually for.
Useful if you are still choosing between them rather than committed to this one.
Why A Premium ARB Compressor
ARB walks through what separates its compressor line from bargain units: sealed motors, real duty cycle ratings, serviceable filters and the electrical kit that comes standard.
If you are comparing this against a parts store special, it is the honest comparison from the people who build it.
Air Lockers And Onboard Air
The original job of an ARB compressor: feeding ARB Air Lockers. ARB explains how the compressor and the locker system work together and why on-board air changes how you drive difficult terrain.
Worth three minutes if lockers are anywhere in your build plan, because this compressor is already the right air source for them.
Frequently Asked Questions
Straight answers on specs, fit and support
What is different from the CKMA12?
System voltage and current draw. The air output, the pressure, the duty cycle, the sealing and the physical size are identical. This one runs on 24 V and pulls roughly half the current for the same air.
Will it fit my truck?
It is not a vehicle specific part. It bolts to any flat surface through four holes you drill with the supplied backing plate as a template, on a 24 V vehicle, and needs roughly an 8" x 4" footprint away from exhaust heat and direct water spray.
How fast will it air up my tires?
ARB rates it at 3.08 CFM free flow and 2.34 CFM at 29 psi. On a 33" tire that is around two and a half minutes from 15 to 30 psi, and about 10 to 12 minutes for a full four tire air up, comfortably inside the 30 minute duty rating.
Can it run air tools?
It holds 100 psi and will run small air tools intermittently, but it has no tank of its own. For sustained tool use, pair it with an air tank or step up to the twin motor CKMTA24. Its core jobs are tires and Air Lockers.
Is the wiring included?
Yes, completely: loom, relay, illuminated ARB rocker switch, pressure switch and terminals. You supply the mounting location and the drill.
Why is there no installation video?
Because ARB has not made one. We checked every product page and both official ARB channels, and no compressor installation film exists. Rather than showing you a fitting video for a different product, the tab is empty and the installation guide is in Resources.
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