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The compressor has a six litre air storage tank. You can't really see this because it is enclosed within the plastic shell housing on the outside. This housing is also useful as it protects the user from touching hot metal parts of the tool, and those compressor cooling fins and pipes can get very hot as the compressor operates. The unit is about the size of a small suitcase and its rectangular shape takes up less room in the back of the van, ute, or in the workshop for storage. It measures 525mm (L) x 285mm (W) x 455mm (H). DEWALT DC745KA battery
The compressor motor assembly is also wrapped in this shell and it is a direct drive, fan-cooled unit, DEWALT DC745KB battery as opposed to a belt-driven model. Direct drive are also generally a little louder in operation. It is rated at 1.5Hp or 1100W. Generally the motor rating is paired to the size of the storage tank. The larger the tank, the larger the motor to keep it filled adequately and up to pressure. The 100W motor is more than adequate for this size tank. It has a pump displacement of 5.2 CFM (cubic feet per minute) but the continuous air supply is rated at 2.5 CFM. DEWALT DC756KA battery
This figure is quite important because it will determine what type of air tools can be used satisfactorily with the compressor. For example, some air tools, like air sanders or die grinders use a continuous supply of air as they are operated. For these tools a larger CFM rating is needed, DEWALT DC756KB battery otherwise the air supply in the tank and that delivered by the pump cannot match that consumed by the air tool, and so the tank drains quickly and the pump cannot keep up, allowing the tank pressure to fall to levels not suitable for the correct tool operation. DEWALT DC840KA battery
On the other hand, air tools like pop riveters and nail guns use air in short bursts, and as a result, DEWALT DC840KB battery the compressor has time to catch up when tank pressure/air capacity falls. There are also air tools like airbrushes, which do use a continuous flow of air, but because the volume of air is much lower than larger spray guns, smaller compressors will happily keep up with their air requirements. Remember too that it is possible to use a small compressor to power a spray gun or a sander or air grinder. You just can't expect to use that air tool continuously and must use it in short bursts with pauses in between to allow the compressor to catch up. You will find most high volume air tool users will have a large compressor because running high demand air tools on small compressors can get frustrating rather quickly. DEWALT DC841KA battery
If you are unsure of what size compressor to buy, let the CFM requirement of your tools be your guide, ensuring you check the CFM of the air tool which will use the most air. Most air tools will have listed a recommended CFM figure for best use. Match your compressor's CFM output to this maximum CFM figure to determine what size unit to buy. And remember to look for the "Free Air Delivery" CFM figure, and not the pump displacement, because as you can see from the figures on this compressor reviewed here, there is a large difference between the numbers! DEWALT DC845KA battery
So, with this unit having a Free Air Delivery of 2.5 CFM, there are definitely going to be some limitations on its use. DEWALT DC845KB battery It will happily power virtually any size air nailer with no problem. It will cycle the motor more often but it will keep up in almost all nailing applications. It will happily run air inflation devices like tire or ball inflators. There is more than enough capacity and air flow there. DEWALT DC940KA battery
Airbrushes are no problem either, and I have run die grinders and an air sander on it just fine, but in shorter bursts with pauses in between. High volume air spray guns can be a bit of a problem because you usually need to spray fairly continuously to do the job properly. I have sprayed nitro-cellulose finishes using this compressor and a touch up gun just fine on smaller woodworking projects though. So it's not going to be perfect for every task, but its certainly capable for most DIY or small scale woodworking/metalworking or workshop cleanup tasks, and that is the market it is aimed at, and priced at too DEWALT DC945KB battery
Back to the features... The main ON/OFF button is located just forward of the handle to turn the motor ON or OFF. The compressor will automatically switch on when the tank pressure is below 85 PSI (pounds per square inch) and automatically cut out at 115 PSI. The upper limit is a safety cutout feature to ensure tank pressure does not exceed the tank's rating. The lower 85 PSI cut-in pressure ensures the tank retains a pressure of between 85 PSI and the 115 PSI cutout pressure. There is a tank pressure gauge on the left side of the main control panel of the compressor. DEWALT DC980KA battery
You will find that most air tools will have a functional pressure range of between 80 and 120 PSI. DEWALT DC980KB battery For air tools that have a maximum 100 PSI rating, the air supply from the compressor will need to be regulated down to 100 PSI. This can be done via use of the onboard regulator knob (large yellow knob, center on control panel) and regulated air pressure gauge (right side of control panel). DEWALT DC981KA battery
You can set virtually any pressure air supply needed, even if the tank pressure is 115 PSI. DEWALT DC981KB battery The regulator knob adjusts the pressure downstream of the actual regulator, and hence can have a different pressure than the tank pressure. To regulate the air pressure, there needs to be air flowing for this to be achieved. You can simply hook up an air blower or other device (except nail guns or intermittent use air tools) and allow the air to flow. While the air is flowing from the tool, turn the regulator knob either way to raise or lower the pressure to the air tool. DEWALT DC981KZ battery
Once this is done you should have a consistent flow of air at the regulated pressure you have set. DEWALT DCD910KX battery Note that if you set a max pressure of, say, 90 PSI, the Tank pressure must be above that figure to guarantee supply. The tank pressure can never be lower than the regulated air pressure at any given time. Simple logic there and this is the same with any air compressor. DEWALT DCD940B2 battery
It is a good idea, when setting a specific regulated air pressure, DEWALT DCD945B2 battery to start by opening the flow of air to the tool, then reduce the regulated pressure down to 0 PSI. Then slowly raise the pressure to your desired setting indicated on the regulated air pressure gauge (right side of the control panel). This way the downstream air pressure setting is more stable and consistent. You can find that if regulating in an opposite manner, from high pressure down to low pressure, that the regulated pressure does not maintain its setting consistently, or rises again to match tank pressure. So be sure to lower output pressure to 0 first then slowly raise it via the regulator knob to the max pressure desired. DEWALT DCDK12 battery
The compressor has the safety cutout valve also located on the control panel. This operates automatically but should be checked occasionally to ensure it hasn't become stuck. You can check it by pulling on the ring outwards to make sure it isn't sticking. A stuck valve can mean the compressor's pressure can exceed maximum safety limits. Thankfully this rarely happens but a regular check of the valve's function will ensure safe ongoing use. DEWALT DW051K battery
The remaining outlet on the control panel is the actual air outlet. This is a 1/4" Nitto style outlet for hooking up your air hose to transport the compressed air to your air tool.On the underside of the unit is the tank drain valve. This is used to drain moisture from the tank that forms and accumulates as air is compressed and stored. The more humid or warm the outside air, the more water is created in the process. DEWALT DW051K-2 battery
The drain valve should be released, ideally, after the end of each day's use. You might only remember to drain the tank once a week, and that is probably ok, but I wouldn't let water sit in the tank for any longer. It can rust the insides of the tank and cause problems later. DEWALT DW052K battery This seems a hotly debated topic. Some compressor owners rarely empty their tanks and have reported no problems with corrosion, but why risk it? Empty it as often as you remember. Make it a part of your routine when you shut off the compressor after each use. Soon it will become habit! DEWALT DW052K-2 battery
Because this drain is attached directly to the compressed air tank, if the tank is full of air, DEWALT DW052K2H battery when you release the drain (by screwing the nut inwards toward the tank), compressed air will be released. As a safety precaution, you should drain excess amounts of air from the tank before releasing the drain screw. It is probably not a bad idea to leave maybe 20-30 PSI of air in the tank when you release the screw because the remaining air rushing to escape the tank via the drain will help move moisture toward the drain hole. Just remember that when you go to use the compressor again that the drain valve is re-engaged, by screwing it outward from the tank until it seats, otherwise your tank will never fill completely and your motor will be working overtime, and probably overheat. Thankfully the sound of escaping air is a good identifier that you have forgotten to close the drain! DEWALT DW052Z battery
The only notable feature on the rear of the unit, apart from the cooling air fins in the housing are power cord storage "rings" to wrap the power cord around.A printed user manual should see you through any required setup (although its pretty much ready to go out of the box) and any troubleshooting, should you need to do any... we haven't had to yet, touch wood! DEWALT DW053K battery
The MOC6L Compressor is also covered by a 2-Year Home Use repair or replacement warranty, and GMC are known for honoring warranties in all genuine warranty cases too. DEWALT DW053K-2 battery
In Use
Since I have a larger compressor in my shop already, this smaller unit finds use wherever I need to undertake smaller scale work around the home (when portability becomes important). I use it mostly for all my trim installation work along with my brad nailer and finish nailer, DEWALT DW053K2H battery and for these it works very well and the portability makes it rather user friendly. It happily runs my large framing nailer too and will keep up without a problem (although I am not driving nails constantly every second or two). Nonetheless it does perform my frame nailing tasks with zero problems. It powers my model airbrush for painting scale models (my other hobby) and neatly slots under my hobby desk out of the way. Because of its operating noise when the motor is underway filling the tank, I can't really operate it in the middle of the night with the young ones asleep upstairs however. But as long as I fill the tank before the sun goes down and have the regulated pressure set, I usually have enough air to last an airbrush painting session. DEWALT DW904(Flash Light) battery
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