Home depot has a decent sale going on the 80 gallon 2 stage air compressors. I was wondering what the main differences are between the 3 big ones they have on sale. they are all 80 gallon, 2 stage oiled compressors. Seems the difference might be just in the pumps themselves. Maybe the motors. The one I see is 7.5 HP, compared to the other 2 at 5hp. Looking for some input. Leaning toward the cheaper one right now.
Dewalt 80 gallon air compressor help
- Thread starter psu927
- Start date
Voi
Well-known member
Looks like the most expensive one has a Baldor motor.
Grandmaster
Member
I am interested in hearing feedback on these compressors as well. The cheapest one does not have a magnetic starter and has a lot of capacitor humps on the motor. It also looks to have a 2-pole motor (3400RPM) and appears to be the loudest and probably fastest spinning of the bunch. The middle priced 5hp has a magnetic starter, and what appears to be a 4-pole (1700RPM) Baldor motor. The most expensive 7.5 hp one says in the description that it comes with a 4-pole baldor motor. The descriptions say all cast iron pump, one piece crank, etc, and they all look to have intercoolers. On paper they seem like they would be as good or better as any of the other not quincy or champion brands!
The Home depot description section lists differnt CFM specs than the specification table section lists. it looks like the specs in the description are the accurate ones. I tried to verify spes on the dewalt wesite but their information on compressors is worthless.
The Home depot description section lists differnt CFM specs than the specification table section lists. it looks like the specs in the description are the accurate ones. I tried to verify spes on the dewalt wesite but their information on compressors is worthless.
Grandmaster
Member
the cheapest one gets decent reviews:
https://www.aircompressorsdirect.com/DeWalt-DXCMV5048055-Air-Compressor/p11580.html
https://www.aircompressorsdirect.com/DeWalt-DXCMV5048055-Air-Compressor/p11580.html
Those specs have to be wrong. First of all, the first two compressors have magnetic starters, meaning they are probably real 7.5 and 5hp. The ones without a mag starter are usually home grade machines with less than 100% duty cycle and rated by peak horse powet (i.e. BS) No 7.5 hp, mag start compressor puts out that little air. It is not the first time HD has screwed up the specs. Take the model numbets and check them on the DeWalt Site or elsewhere.
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Hammer1963
Well-known member
I also read about the 3 DeWalt compressors. While these are good deals, check out Rural King. They currently have an incredible sale on a very similar compressor that appears to be the same DXCMV5048055 240V model without the gauges and quick connect ports which I actually prefer. Their compressor ends in 55.1 which is the same Sanborn compressor that Menard's offers. I will be heading to the nearest Rural King tomorrow evening to check this out. BTW, if you go to Aircompressosdirect.com you will find the same compressors and find what appears to be the true specs.
American Locomotive
Well-known member
The correct CFM is listed in the description for each one (not the spec section)
7.5HP: Featuring 22.1-CFM at 100 psi and 21.2-CFM at 175 psi with 230-Volt
5 HP Mag-Starter : CFM at 100 psi 17.9
5 HP Cheapy: 17.9 CFM at 100 psi,17.0 CFM at 175 psi
7.5HP: Featuring 22.1-CFM at 100 psi and 21.2-CFM at 175 psi with 230-Volt
5 HP Mag-Starter : CFM at 100 psi 17.9
5 HP Cheapy: 17.9 CFM at 100 psi,17.0 CFM at 175 psi
There is some very interesting information if you look at the parts lists. Both 5's use the same pump which is identified as a Kellogg model number. The motor on the small one is an A O Smith., identified by the fact that the capacitors are listed as A O Smith. A O Smith makes motors, not capacitors. Between the 5's you are paying for a better motor and a mag starter. I did not see duty cycle stated directly but the industrial ones are generally rated to to run continuously and the home ones are not. Just compare the physical size of the two motors.
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Grandmaster
Member
One of the reviews on air compressors direct mentioned the pump being made by Kellog. There was a reply by a dewalt rep correcting the reviewer stating that the pump was not made by Kellog. The rep stated that the pump was made by Dewalt. Whether rep knew what they working talking about...who knows!
The 5hp, and 7.5.hp models with the mag starter and 4-pole motors are probably the better units and are better suited for heavier usage, but the cheapest one may be the better value and for some that makes it the better buy. Personally if I were choosing between those, I would go with the mid priced one with mag starter and slower turning 4-pole 5hp motor, unless I need the higher output the 7.5hp delivers.
The 5hp, and 7.5.hp models with the mag starter and 4-pole motors are probably the better units and are better suited for heavier usage, but the cheapest one may be the better value and for some that makes it the better buy. Personally if I were choosing between those, I would go with the mid priced one with mag starter and slower turning 4-pole 5hp motor, unless I need the higher output the 7.5hp delivers.
md21722
Well-known member
For the two higher priced models, I really don't think De Walt makes air compressor pumps that look the same as Sunburn and Curtis in this price range. I believe they'll all Made in China and are of decent quality. The cheaper one is a different pump, probably smaller and faster turning, lower air output, with a cheaper motor. More air is more better. So the 7.5 HP gets my vote.
Trey T
Well-known member
The third one, in first photo, appears to be a clone Kellogg American 335 pump. A year ago, I saw my local HD had it for couple of months but immediately got replaced by another one (w/ pump looks like first two link w/ mag starter). The 335 pump would have disc valves which is superior to reed valves for commercial purposes.
The first two links are likely to have reed valve similar to Quincy QT-5 ... pretty much same caliber.
The first two links are likely to have reed valve similar to Quincy QT-5 ... pretty much same caliber.
So you are saying the cheaper one has the best pump?
Looks like the main difference is with the motor. I *think* it is the same pump on all 3 (don't go by the Home Depot pics - go to the DeWalt website)
48055 $1,159 features a cast iron, twin cylinder, two stage, oil lubricated pump, a heavy duty 240 volt induction motor, integrated control panel and is shipped with synthetic oil.
Equipped with an integrated control panel with air flow regulator, two quick connect air outlets, tank and tool pressure gauges
18055 $1,418 features a cast iron, twin cylinder, two stage, oil lubricated pump, a heavy duty 240 volt induction Baldor motor, integrated magnetic starter and is shipped with synthetic oil
Equipped with a pre-wired and mounted magnetic starter, pressure gauge and on/off switch, high flow side port bung to deliver maximum air flow
18075 $1,698 features a cast iron, twin cylinder, two stage, oil lubricated pump, a Baldor low 1725RPM industrial grade 240 volt induction motor, integrated magnetic starter and is shipped with synthetic oil.
Equipped with a pre-wired and mounted magnetic starter, pressure gauge and on/off switch, high flow side port to deliver maximum air flow
The cast iron two stage oil lubricated pump features a one-piece cast iron crankcase, thermally stable cast iron cylinder body, aluminum head and valve plate, automotive style bearings, durable Swedish stainless steel reed valves, an oil level sight glass, an easily accessible oil fill, and a 12 inch cast iron balanced flywheel
http://www.dewalt.com/en-us/products/gear-and-equipment/air-compressors
48055 $1,159 features a cast iron, twin cylinder, two stage, oil lubricated pump, a heavy duty 240 volt induction motor, integrated control panel and is shipped with synthetic oil.
Equipped with an integrated control panel with air flow regulator, two quick connect air outlets, tank and tool pressure gauges
18055 $1,418 features a cast iron, twin cylinder, two stage, oil lubricated pump, a heavy duty 240 volt induction Baldor motor, integrated magnetic starter and is shipped with synthetic oil
Equipped with a pre-wired and mounted magnetic starter, pressure gauge and on/off switch, high flow side port bung to deliver maximum air flow
18075 $1,698 features a cast iron, twin cylinder, two stage, oil lubricated pump, a Baldor low 1725RPM industrial grade 240 volt induction motor, integrated magnetic starter and is shipped with synthetic oil.
Equipped with a pre-wired and mounted magnetic starter, pressure gauge and on/off switch, high flow side port to deliver maximum air flow
The cast iron two stage oil lubricated pump features a one-piece cast iron crankcase, thermally stable cast iron cylinder body, aluminum head and valve plate, automotive style bearings, durable Swedish stainless steel reed valves, an oil level sight glass, an easily accessible oil fill, and a 12 inch cast iron balanced flywheel
http://www.dewalt.com/en-us/products/gear-and-equipment/air-compressors
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Trey T
Well-known member
Yes but the second photo shows that the pump looks like the first and second link. To confirm - look at the reviewers' photos, it's not the clone KA335 pump.
Grandmaster
Member
I think what he is saying is if you look at the first photo of the cheapest one, the pump's head looks to be a kellog clone. however if you look at the 7th picture, the pump has a different head. The first picture the head has rounded areas for the disc valves and a pressure release valve on top of the head. The other pics, including the 7th has square heads and the pressure release is on the intercooler..
I think what Trey is saying is it appears when first released this compressor used a Kellog clone but that later and possibly current models no longer use the Kellog clone pump.
I edited my post while you guys were posting
Don't look at the HomeDepot pics, look at the ones on the DeWalt website
http://www.dewalt.com/en-us/product...-gallon-two-stage-air-compressor/dxcmv5048055
http://www.dewalt.com/en-us/product...-gallon-two-stage-air-compressor/dxcmv5018055
http://www.dewalt.com/en-us/product...-gallon-two-stage-air-compressor/dxcmv7518075
Don't look at the HomeDepot pics, look at the ones on the DeWalt website
http://www.dewalt.com/en-us/product...-gallon-two-stage-air-compressor/dxcmv5048055
http://www.dewalt.com/en-us/product...-gallon-two-stage-air-compressor/dxcmv5018055
http://www.dewalt.com/en-us/product...-gallon-two-stage-air-compressor/dxcmv7518075
md21722
Well-known member
Those pumps with the De Walt links look similar to the pumps that come on Sanborn or Curtis value series air compressors. My local air compressor dealer sells them to the tire shops in town in the 7.5 HP configuration and says the shops are happy with them. The better motor & a magnetic starter are worth the few hundred more.
laser3kw
Well-known member
#3 link Model # DXCMV5048055 - I agree with that^^^^^^
Look closely at the cfm specs within each ad.
the first one Model # DXCMV7518075:
and then in specs:
22.1 cfm is kinda far off 14.1 cfm
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I have no idea who assembled them but the pump is a Kellogg. It says so right on the parts list that you can access on the HD site. Even gives the model number. The two 5's use the same pump. As Kellogg makes air compressors, I don't see why they could not have made the whole thing. There is one big jump between Sanborn and Kellogg.
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Hammer1963
Well-known member
I just purchased a similar unit this evening from Rural King. Dewalt DXCMV5048055.1
This model is the same as the $1159.99 unit at HD with some slight differences. The Rural King unit does not come with the manifold unit like the HD offered unit. The RK unit has a braided hose extended tank drain which is a nice touch. The motor is a Mexican made Century. The unit came with instructions on how to extend the pump warranty to 4 years by purchasing a maintenance package consisting of oil, filters and belts. I definitely will be signing up for this.
This model is the same as the $1159.99 unit at HD with some slight differences. The Rural King unit does not come with the manifold unit like the HD offered unit. The RK unit has a braided hose extended tank drain which is a nice touch. The motor is a Mexican made Century. The unit came with instructions on how to extend the pump warranty to 4 years by purchasing a maintenance package consisting of oil, filters and belts. I definitely will be signing up for this.
Attachments
I've been digging but have yet to confirm if they are the same pump. my thoughts are going with the cheaper compressor, and if/when the motor goes upgrading that to a better baldor (or equivalent) motor. But I need to know if the compressors are the same.... Can anyone confirm this?
Hammer1963
Well-known member
Go to Rural King. The compressor is $999.00 plus a 12% rebate after the purchase
Ree75
Well-known member
I would also look at the power supply phases, makes a diff on what you can run.
Went with the cheapest one. If I get the dewalt maintenance kit the warranty goes up to 4 years. I couldn't justify buying the 7.5 hp for my usage (low to moderate) In comparison to the middle priced one, if the motor ever does go on the one I bought, I can buy another for the price difference. CFM ratings are the same between the 2, the only difference is the motor, (and motor rpm which has little to no effect on pump rpm due to pulley sizing) and the cheaper one has the integrated panel, which will be nice until I get my shop lines ran. This thing should last me 10-15 years no problem with proper maintenance.