6 Reasons OEMs Choose VMAC Air Compressors (Air-Ends)

VMAC air compressor systems, including the rotary screw air-end component, are known globally for their performance and reliability. VMAC rotary screw compressor systems are custom built to suit a variety of applications and proven to work in the world’s harshest climates. Here are the top 6 reasons distributors for OEMs, like Caterpillar, Cummins, Ford Industrial Engines, John Deere and Lincoln Electric, use VMAC air-ends as their custom rotary screw air compressor solution.

1.       100% Duty Cycle

VMAC manufactures custom OEM rotary screw air compressors that can operate at 100% duty cycle, which means the supply of air is continuous. No time is wasted waiting for air, which allows for operators to complete jobs faster and be more productive than if they were using a reciprocating air compressor designed for just 25% duty cycle.

2.       Higher output than reciprocating air compressors

Rotary screw air compressors offer a steady supply of air flow, resulting in a higher output of air than reciprocating air compressors can produce. VMAC rotary screw air compressors are powerful, and air-end capabilities range from 10-30 CFM, 30-70 CFM, and 70-130 CFM. This makes VMAC the best choice for OEMs with demanding applications.

3.       Compact

VMAC air compressors are designed to be compact, with the ability to fit into tight spaces. For many OEMs, space is a major challenge, but VMAC’s compact designs conserve space on any platform, and allow for more room to store other tools and equipment.

4.       Lightweight

In addition to being compact, VMAC compressors (air-ends) are lightweight. The lightweight design makes them ideal for mobile applications, and benefits include improved productivity and fuel economy—your bottom line will thank you.

5.       Technical Support

OEMs will be pleased to know that VMAC’s technical support team is available to help by phone, email, and online on the VMAC Knowledgebase. Should any challenges arise, the talented and experienced support team will be available to answer your questions, and get you back to work faster.

6.       Customizable

VMAC rotary screw compressor systems can be designed to your exact specifications, allowing for a completely customizable solution. VMAC’s OEM team will work closely with your design team to ensure your customized air compressor system is exactly what you need for your industrial engine application.

VMAC Air Innovated banner

VMAC OEM Custom Solutions

VMAC custom air compressor solutions provide OEMs with high performing and reliable rotary screw compressors, designed specifically for your unique application. VMAC air compressors (air-ends) produce from 10-130 CFM at 100% duty cycle, and the air compressors are compact, lightweight, and customizable. Each system is backed by a superior technical support team.

Learn more about VMAC OEM, including applications, capabilities, and mounting kits. In addition, you can also browse VMAC air compressor components, including air compressors (air-ends), air oil separator tanks and oil coolers.

Contact the OEM team by calling 1-888-514-6656, or contact the OEM team online.

Park Industries “RAPTOR” Quarry Drill Exceeds Expectations with help from VMAC Hydraulic Drive Air Compressor

Working in stone quarries can present some of the most challenging environmental conditions on the planet for both man and machine. Extreme heat in the summer, followed by extreme cold in the winter, along with large amounts of dust when it’s dry and excessive mud when it’s raining or snowing; each create a unique set of adverse conditions. Continue reading “Park Industries “RAPTOR” Quarry Drill Exceeds Expectations with help from VMAC Hydraulic Drive Air Compressor”

With Ogura’s help, VMAC develops tiny 30CFM air compressor and discovers new market

VMAC UNDERHOOD 30 CFM Air Compressor

Ogura’s new small size/high torque electromagnetic clutch helps VMAC’s aftermarket UNDERHOOD™ LITE air compressor meet performance and cost reduction goals previously unobtainable.

Today’s commercial van manufacturers are changing the game by delivering new Euro style vans to North America. These new platforms boost fuel efficiency and increase cargo space dramatically. Ford’s 3.7 L Transit, Mercedes Benz’s 3.0L Sprinter, and the Ram 3.6L ProMaster are but three of the new entrees causing shakeups in the mobile service industry.

While these vehicles offer state of the art engines, reduced emissions, and roomy vehicle platforms, they have drastically reduced the amount of available under hood space usually allocated for engine driven aftermarket components such as; air compressors, secondary alternators and hydraulic systems.  Generally, mobile service businesses and municipalities buy these vehicles and outfit them with engine driven accessory systems for the many important tasks they do every day.

Continue reading “With Ogura’s help, VMAC develops tiny 30CFM air compressor and discovers new market”

Types of Compressors for your Industrial Engine

You’ve decided that your current application needs compressed air.  You’ve figured out how much air you need, how you are going to drive the compressor and what engine you are going to use to power it.  Now comes the time to make the decision of what type of compressor is best suited for your particular needs.  When choosing the type of compressor, there are really only 3 styles commonly found in mobile applications.

Continue reading “Types of Compressors for your Industrial Engine”

Power requirements for your industrial engine powered air compressor

So you’ve decided you are in the market for an air compressor to add to your existing industrial engine or to include as part of a new piece of equipment you are designing. Maybe you or your customers are tired of having to haul another separate piece of equipment around to job sites. Maybe you’re looking to open up new markets with a product that does it all. In any case, you are going to have to figure out what your needs are so you can start looking for the right piece of equipment. Continue reading “Power requirements for your industrial engine powered air compressor”

Methods to Power Your Air Compressor with an Industrial Engine

Powering your air compressor by an industrial engine can be done by various means.  Choosing the way you power your compressor should be decided by a number of factors.  Space, existing components and systems, weight and your engine options are all variables to consider.   In this article we talk about the most common found in the market today.

Engine Mounted FEAD Belt Drive

Auxiliary components are commonly mounted directly to the engine and driven from a serpentine or V belt. This is termed “Front End Accessory Drive” (FEAD) and is often used to drive alternators, generators, air conditioning compressors, water pumps, cooling fans etc.  Air compressors can also be driven via FEAD belt off the front of an engine.  This can be in line with the existing belt system or by adding another pulley to the crankshaft and designing another belt system. The driven and driving pulley diameters can be customized to provide the required compressor output at a given engine speed. Belt drives will also provide some damping of potentially damaging torque pulses.  The compressor can be driven via a clutch or fixed pulley depending on whether it is desirable to be able to completely stop the compressor while the engine is running. A custom bracket will likely be needed to mount to the engine to support the compressor and if equipped, the secondary belt system components such as the idler(s) and tensioner.

Frame Mounted Belt Drive

To simplify the design of a bracket to mount the compressor it can be mounted to the base frame instead of directly to the engine.  The belt is still driven off a pulley mounted to the engine’s crankshaft.  Generally, a V belt will be used instead of a serpentine belt as it is better able to handle misalignment and variations in tension due to the changes in positioning between the engine and compressor under operating conditions, especially if the engine is not hard mounted to the frame.

Auxiliary Port Direct Drive

Many industrial diesel engines and some gasoline engines come equipped with an auxiliary PTO port used to power bolt-on accessories.  These ports are usually part of the front or rear engine cover and are driven via the crankshaft/camshaft/fuel pump gear-train.  Auxiliary ports come in various configurations usually conforming to an industry standard.  The connection to the drivetrain is generally either a splined port or direct gear mount.  Over or under drive ratios may also be available via bolt-on adaptors.  Although traditionally small reciprocating compressors are driven by these auxiliary ports there is a growing number of higher volume rotary screw compressor designs taking advantage of this PTO drive method.

Flywheel Direct Drive

A common method of power to an air compressor is to drive it through a coupling directly off of the flywheel.  Commonly used industrial couplings are designed to dampen vibration and torque spikes while often allowing some misalignment between the engine and compressor.  To generate the high RPM required for rotary screw compressor operation a speed increasing gearbox is commonly used.

Flywheel Belt Drive

Much the same as the FEAD drive listed above, a pulley and belt configuration can be connected to the flywheel to power your compressor.  The main advantage to using a belt driven from the flywheel is that there are generally fewer components to work around which typically makes designing the bracket and belt system simpler.

Hydraulic Drive

While not directly mounted to the engine, the use of an engine-driven hydraulic motor to power an air compressor is not uncommon.  If the engine or equipment is using hydraulic power for other functions, adding hydraulic power to run a compressor can be a convenient option. This method is less efficient compared to the direct drive methods discussed above. It may require additional hydraulic cooling capacity and will burn more fuel for a given compressor output. This method does allow more positional flexibility between the engine and compressor which can be helpful if there is limited space on or around the engine.

Electric Drive

Like the hydraulic drive above, using electric power generated by the engine is another way of producing air power.  While the availability of sufficient power to produce large air volumes is unlikely, small electric driven compressors can be used when air flow and duty cycle are very low.


Ultimately choosing a drive method for your compressor comes down to your unique situation, air compressor requirements, and equipment available to you. The choice of how best to drive your air compressor system is best discussed with the members of the application team of your engine distributor and compressor manufacturer.

If you have any questions about this article or anything mobile compressor related, please contact us.

The Top 7 Questions When Adding a Compressor to Your Industrial Engine

When you are looking at considering putting a compressor on a John Deere™, Kubota™, Cummins™, Caterpillar™, Deutz™, Robins-Subaru™, Isuzu™ or a multitude of other industrial engine manufacturers, there are some key questions about your engine and your application that need to be answered before you can determine the best solution.

Here are some important questions to have answered:

1. What are you using the air for?

This helps to ensure that you are choosing the most appropriate solution for your unique requirements. How many CFM (cubic feet per minute) and at what pressure do you require to run your tools or equipment correctly?

2. What duty-cycle do you require for the compressor to operate?

This refers to how much you are using the compressor in a given time frame. Do you need air continuously for a piece of machinery (100% duty cycle) or infrequently to do small jobs? (say 15 minutes at various intervals over an hour – 25% duty cycle). This is critical information for selecting the type of air compressor solution you should be pursuing. Is it a heavy duty application where a robust solution like a rotary screw air compressor would be best, or is it a light duty application that an inexpensive reciprocating air compressor is going to provide better value? How critical is the air requirement? How much will downtime cost you?

3. What is your engine load?

Do you require air while running another piece of equipment from the same engine? If multiple pieces of equipment are running at the same time, the power being drawn from the engine is greater than if you turn off each component when not being used. How much horsepower are you already using for your equipment and how much will be available to power the compressor? Not only does this information help calculate the power requirements but also acts as a guide to the type and complexity of control system needed. It is important to ask, “what is really required?” instead of, “what would be nice to have?”.

4. What air pressure do you require?

This also helps to determine the power requirements for the compressor. It potentially determines what type of compressor will be required. High pressure applications require specialized compressors. It is important to not over specify your needs as that may increase costs, create less reliable systems and potentially shorten tool and equipment life downstream of the compressor.


5. What environment do you operate in?

This information is really important for you to know in order to correctly specify cooling and filtration requirements. If you work in frigid conditions, you will also need to consider ways of ensuring the compressor will work well in the cold. Extreme heat requires more cooling. Do you work in dusty environments? If so, protecting your compressor from dirt and other debris will improve the longevity of your compressor. Understanding how the engine and equipment behaves while operating is also a requirement. Is it stationary, moving or rocking back and forth?

6. What is your engine and equipment mounted to?

Are you mounting your equipment to a stationary skid or trailer? Is it truck mounted or on an auxiliary piece of equipment attached to the truck? Are you limited by the space around the unit or is there a requirement for the equipment to be within the confines of an enclosure? Oftentimes, compressors must be mounted to an existing piece of equipment that already has a frame and a sheet metal enclosure, without making changes to the existing structure. Vibration also has to be addressed if your equipment operates in a high vibration environment.

7. What engine are you using?

Can you make changes to your engine if needed?There are many options available from the engine manufacturer for each engine and some are extremely important to the mounting of an air compressor. Engine mounts, coolers, water pump options, auxiliary ports, alternator size, front cover, harmonic balancer and pulley are a few things to consider. What is the horsepower of the engine? Is an auxiliary port available, if so, what type is it? How much free space is around the engine? How about the radiator; is there extra cooling capacity available to handle the heat load from the compressor or will you need to either increase its size or add additional cooling capacity?

Along with the engine details, you need to know what speed your engine is running at. What is the typical operating RPM (revolutions per minute)? The minimum and maximum RPM information is also important. If you want a belt driven, clutch actuated compressor solution, you will need to know at what engine RPM the clutch will be engaged. If the speeds are too high, there is a risk of the clutch burning out prematurely; a control system would be required to prevent this from occurring. Compressor safety systems can also be programmed in to prevent occurrences like over temperature conditions.


There is nobody that knows your business, environment and equipment better than you. With your knowledge and answers to these questions, you are well on the way to adding a compressor to your piece of equipment.

Lastly, it is important to find an air compressor provider that will work with you, and provide the support and expertise that you need. A compressor can be purchased from anyone, but are they asking these questions up front, or just trying to sell you a compressor and leaving you high and dry when it doesn’t meet your expectations, or leaves your operator with an expensive breakdown in the field? Do your research to ensure you get the results you require.

If you need help answering these questions, please don’t hesitate to contact us.