I was at my local tractor supply tonight looking at air compressors. I noticed that both 80 gallon air compressors were decently priced cheaper then Zoro if you could get the 25% off. But since they don't take discounts off of ingersolrand stuff anymore anyway. The 5 hp model is $999 and the 7.5 hp $1900. Here is the specs of the 7.5 HP Is this a good motor? Is this a good reliable air compressor?
Air compressor help on this model
- Thread starter skipnay
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ToddW
Well-known member
GOogle the part # (not zoros) and there are tons of reviews on that compressor as well as prices close to your 1900$ from others than Zoro that may be cheaper for you on shipping/tax/local/etc...
GarageGuy89
Well-known member
I'm sure others will have better advice but for $1900...heck even $1000 you can get a pretty built proof used machine like a champion R15 or R30 that will outlive you and your needs.
There is sooooo much money to be saved by getting a quality used compressor. I just recently bought one and the guy knocked $700 off the price tag just because it was so big no one else could get it out of his shop. Took 5 guys to move it but hey for $500 and roughly 23 CFM can't beat it! You'll find that people have a hard time getting rid of them because they are so big and no-one can take them, thus the price drops if your willing to go get it.
There is sooooo much money to be saved by getting a quality used compressor. I just recently bought one and the guy knocked $700 off the price tag just because it was so big no one else could get it out of his shop. Took 5 guys to move it but hey for $500 and roughly 23 CFM can't beat it! You'll find that people have a hard time getting rid of them because they are so big and no-one can take them, thus the price drops if your willing to go get it.
redmondjp
Well-known member
^What he said.
And keep an eye out for 3-phase units as well - if you can get one of those priced low enough, you will have enough to buy a single-phase motor for it and still come out ahead. Most businesses shy away from buying used compressors, and home users don't have 3-phase power available.
And keep an eye out for 3-phase units as well - if you can get one of those priced low enough, you will have enough to buy a single-phase motor for it and still come out ahead. Most businesses shy away from buying used compressors, and home users don't have 3-phase power available.
GarageGuy89
Well-known member
Also good advice. Problem with the 3 phase units are most of them are over 5hp which really limits your single phase capabilities for power. Once you jump past 5hp on single phase you start adding expensive add ons to make it work, so just keep that in mind.
I will say that probably 8 out of the 10 larger 5 hp and up compressors I looked at were all from businesses. In which they bought a new one and didn't need the old one anymore for whatever reason. Additionally they all serviced them on a regular basis, and the one I bought even had the paperwork to back it up. Just gives a bit more insurance your not buying a turd.
American Locomotive
Well-known member
Like what?
MOTORHEAD383
Member
md21722
Well-known member
Quote:
Originally Posted by GarageGuy89 View Post
Also good advice. Problem with the 3 phase units are most of them are over 5hp which really limits your single phase capabilities for power. Once you jump past 5hp on single phase you start adding expensive add ons to make it work, so just keep that in mind.
The compressor shops in my area don't recommend 10HP single phase air compressors and folks like Champion don't even make them. So your alternatives are to do it yourself, an expensive VFD, or some kind of RPC or Phase Perfect... 7.5HP is the largest single phase motor "commonly" available.
Originally Posted by GarageGuy89 View Post
Also good advice. Problem with the 3 phase units are most of them are over 5hp which really limits your single phase capabilities for power. Once you jump past 5hp on single phase you start adding expensive add ons to make it work, so just keep that in mind.
The compressor shops in my area don't recommend 10HP single phase air compressors and folks like Champion don't even make them. So your alternatives are to do it yourself, an expensive VFD, or some kind of RPC or Phase Perfect... 7.5HP is the largest single phase motor "commonly" available.
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md21722
Well-known member
I see these in my area most often as "fully packaged" with the air cooler because people are using them for painting or sand blasting. If you need that much air, chances are you need it to be dry so an after cooler, separate air dryer, or something like that is going to be needed. Fully packaged they cost around $2600. If you look at the reviews on Northern Tool and what not, there are a lot of happy owners. Going up to a Saylor Beall 707, Champion R30, or Quincy QR would be an improvement but only you can decide if its worth it. If going with IR, I tend to prefer the IR 2545 based pumps. They are easy to identify because they have 3 intercooler lines in parallel and are usually painted tan rather than black. The Saylor Beal 707 and Champion R series pumps have been around for decades and are proven long life, problem free pumps. Champion R series uses an integrated aluminum head that eliminates head gaskets and valve plates. They've been making that way for at least the past 60 years and its not uncommon to find pumps that are 50 years old still working. They also have a Centurion II line that uses more conventional cast iron head, valve plate, and head that is less expensive. Quincy QR series is another line that people really like. Their QT series available at big box stores does not compare. Eaton sells Taiwanese import clones of the Saylor Beall 705/707 pumps. Some people like them and some don't.
redmondjp
Well-known member
OK, but also keep in mind that most of these compressor pumps have a range of operation, typically something like 400-900rpm. If they are set up with a 10HP motor in the upper speed range, you can run them slower and use a 7.5HP or a 5HP motor instead, with a corresponding reduction in flow of course.
md21722
Well-known member
That is true where it applies. 5-7.5hp 3ph to 1ph is not too difficult w a motor swap. Reducing 10hp to something more single phase friendly depends on the pump and requires a pulley change where allowed.