Automotive Forums .com - the leading automotive community online! Automotive Forums .com - the leading automotive community online!
Automotive Forums .com - the leading automotive community online! 
-
Latest | 0 Rplys
Go Back   Automotive Forums .com Car Chat > Fabrication & Tools > Fabrication Tools
Fabrication Tools Discuss and learn about all types of tools used in fabrication, from angle grinders to english wheels.
Reply Show Printable Version Show Printable Version | Email this Page Email this Page | Subscription Subscribe to this Thread
 
Thread Tools Search this Thread
Old 03-16-2005, 05:25 PM   #1
wonword
AF Regular
 
Join Date: Mar 2005
Location: St.Paul, Minnesota
Posts: 87
Thanks: 0
Thanked 0 Times in 0 Posts
Send a message via AIM to wonword
Air Compressors?

Ok here is the situation. I am going to paint my car and I need a compressor for running all kinds of airtools, including sanders, grinders, impact wrenches, spray guns . . . I need to know what the minimum number of gallons that will support all this stuff(estimate with a 5hp motor). Checker's has a 22 gallon 5 hp compressor for 150 bucks, is that big enough?
Thanks,
John
__________________
94' Nissan Altima SE
K&N High Flow Air Filter
Greddy St Exhaust
OBX Header
Short Throw Shifter
Extreme Performance Clutch

68' AMC Abassador
Chevy 350
TH 350 Tranny
Headers
Dual Exhaust

1999 Suzuki GSX-R 600
Yellow/Black
Yoshimura Exhaust

http://members.cardomain.com/wonword
wonword is offline   Reply With Quote
Old 03-16-2005, 06:52 PM   #2
mike@af
Captain Over Engineer
 
mike@af's Avatar
 
Join Date: Feb 2003
Location: New York, New York
Posts: 6,711
Thanks: 27
Thanked 29 Times in 23 Posts
Send a message via ICQ to mike@af Send a message via AIM to mike@af Send a message via Yahoo to mike@af
Re: Air Compressors?

I've got a 4 Gallon, and two 21 Gallons. The 21 Gallons run fairly constantly when Im on the grinders and sanders. They are 9cfm at 90 PSI. The 21 Gallon works, but after awhile it gets annoying. I'd prefer a 60-80 Gallon. The 21 Gallons are like $350, the 60-80s are like $400-$500. So I would have spent the extra cash if I wasnt given a 21, and if I had the space.
__________________
-Mike
AF Director of Media / Photographer

mike.lawrence@automotiveforums.com | AutomotiveForums.com | Flickr Gallery
mike@af is offline   Reply With Quote
Old 03-16-2005, 09:12 PM   #3
MagicRat
Nothing scares me anymore
 
MagicRat's Avatar
 
Join Date: Dec 2003
Location: City of Light
Posts: 10,700
Thanks: 12
Thanked 79 Times in 74 Posts
Re: Air Compressors?

What kind of voltage does the 5 hp use?
I have a 5 hp 110 volt compressor with a 20 gallon tank, and it is marginal for keeping up with any high flow air tool. Also it is very sensitive to poor electrical wiring. You need to be close to your electrical panel and use fat wiring. It simply will not start the motor if one uses a regular extension cord or standard household wiring, unless the circuit os bery short.
For many years I had a 2 hp 220 volt 2 cyl industrial compressor on a 60 gallon tank. It beat my 5 hp compressor hands down, even though it had less hp. The 220 volt makes a big difference.
The best compressor for high demand is a gasoline powered one. I have a 2 cyl compressor powered by a 5.5 hp Honda. It is portable and more powerful than any compressor short of my old 550 volt three-phase compressor.
My gasoline compressor is so good, I have not bothered with using my electric unit in 2 years .
MagicRat is offline   Reply With Quote
Old 03-17-2005, 12:51 PM   #4
wonword
AF Regular
Thread starter
 
Join Date: Mar 2005
Location: St.Paul, Minnesota
Posts: 87
Thanks: 0
Thanked 0 Times in 0 Posts
Send a message via AIM to wonword
Re: Air Compressors?

Hey Guys Thanks for the Info,
Umm. . . im not sure what kind of voltage it uses. But it looks like I should save up a little more for the 60 gallon 7hp that they sell at Menard's. I just want to be able to sand, grind and spray constantly without having to wait for the tank to refill. Thanks for the info though.
John
__________________
94' Nissan Altima SE
K&N High Flow Air Filter
Greddy St Exhaust
OBX Header
Short Throw Shifter
Extreme Performance Clutch

68' AMC Abassador
Chevy 350
TH 350 Tranny
Headers
Dual Exhaust

1999 Suzuki GSX-R 600
Yellow/Black
Yoshimura Exhaust

http://members.cardomain.com/wonword
wonword is offline   Reply With Quote
Old 09-26-2006, 04:02 PM   #5
drew300
AF Enthusiast
 
Join Date: Oct 2004
Location: hamilton
Posts: 505
Thanks: 0
Thanked 1 Time in 1 Post
Re: Air Compressors?

I get confused by the hp ratings on these.
With 110 Volts, 1.5 hp from an induction motor is a maximum you get. These high ratings, like a 5 hp compressor on 110 V must used the stored air to get 5 hp, for a short time. that's why your 2hp motor, 220 V industrial unit beats a 5 hp.
I knew a guy who used a smallish compressor, but filled 2- 40 gal hot water tanks with 90 psi before he started into painting a car. (A water tank in our area is rated at 150 psi.) He had lots of air for the job.
drew300 is offline   Reply With Quote
Old 05-05-2019, 06:20 PM   #6
Schurkey
AF Enthusiast
 
Join Date: Jul 2005
Location: the Seasonally Frozen Wastelands
Posts: 809
Thanks: 6
Thanked 54 Times in 54 Posts
Re: Air Compressors?

There is no such thing as a "5-horsepower, 110 volt" air compressor. It is not possible with ordinary house or small-business wiring.

As said, a standard 110--120 volt circuit can support about two horsepower.
Maybe less. There's mathematical formulas for converting electric power into horsepower.

Lots of air compressor manufacturers got into trouble by advertising crazy horsepower specs. Same as shop vac manufacturers who claimed "6 horsepower" motors that were the size of a small grapefruit.

You can buy a million different brands of small air compressors that CLAIM to be able to power "real" air tools. Most of them are flat-out lying, because they will not keep up with the air demands of ordinary air tools. You'll have to stop and let the compressor catch-up.

You want an air compressor to use with automotive air tools? Real compressors START at 5 horsepower, 240 volts, and 60 gallon tanks. I had one of those. Poor thing ran continuously when I was using my die-grinder, but put out enough pressure to be useful. After a few years, I moved up to 5 horsepower, 240 volts, TWO STAGE, 80 gallon tank. That guy runs any one air tool I own, as long as I want to run it. If I wanted to run two tools at once...it would probably not be big enough.

For fukk sakes, do NOT buy an "oilless" or "oil-free" compressor. They'll make you barking insane from all the noise they make. The ONLY good thing about them is that during their short and noisy life-span, they don't put any oil into the air that can contaminate the paint you're spraying.
__________________
Declared "the flat out DUMBEST poster on this board" and holder of the the dead-former-moderator-sanctioned rating of "dumbass".
Schurkey is offline   Reply With Quote
Old 05-05-2019, 09:03 PM   #7
Stealthee
Your worst nightmare
 
Stealthee's Avatar
 
Join Date: Oct 2004
Location: Smithfield, Pennsylvania
Posts: 5,502
Thanks: 5
Thanked 147 Times in 144 Posts
Re: Air Compressors?

You realize you're replying to a 13 year old thread right?
__________________
Stealthee is offline   Reply With Quote
 
Reply

POST REPLY TO THIS THREAD


Bookmarks
Go Back   Automotive Forums .com Car Chat > Fabrication & Tools > Fabrication Tools

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 12:22 AM.

Community Participation Guidelines | How to use your User Control Panel

Powered by: vBulletin | Copyright Jelsoft Enterprises Ltd.
 
 
no new posts