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May 22, 2010 15:38:03 GMT
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May 22, 2010 17:17:39 GMT
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The tank size is not as important as the air flow characteristics. What you need to know to compare air compressors is free air flow (250L/min on your eBay example) and perhaps maximum power. As a general rule of thumb a 3hp air compressor like the eBay example should be fine for your purposes, as long as it actually works.
Since you're looking at cheap brand new stuff your problem is going to be making sure that you avoid any kind of completely unfit-for-purpose gear which breaks within hours of first use. Unfortunately eBay is the primary source for such garbage. Personally if I was you I'd be looking to buy used, or otherwise buy something in a shop which at least has a statutory warranty.
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May 22, 2010 19:42:10 GMT
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^ as above!
Get something with at least 10cfm free air with 100% duty cycle.
I have a 7cfm 75% duty cycle wolf compressor, and although it is good, it gets way hot if you run it for long even if you don't exceed the duty cycle.
As above by a good second hand unit if you want to spray.
For my impact gun I have actually switched to my titchy 1.25hp 5ltr compressor. It is much better quality, and although you can only use the gun in short bursts, that is all you really need for an impact gun.
If you are using air ratchets, drills, die grinder and sander type tools you will need LOTS of air.
Lewis
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May 22, 2010 23:37:22 GMT
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The one posted isn't built yet according to the description?
You order one then they place a build order in 3 weeks or something, I'm calling shenanigans...
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berendd
Europe
why do I need 3 keys for one car?
Posts: 1,449
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as said before, don't go for the chinese curse word..
I have a 150l 1956 german quality compressor and it's great.. when you shop for older stuff the air flow is usually a bit lower, but duty cycles are better and tanks bigger so they work better.
Over here, 1 phase ones are pretty expensive and 3 phase ones are cheap as chips, get a frequency converter with soft start off an air handling unit of pump set and bolt it on a 3 phase one and you have a cheap 1 phase compressor with 3 phase power.
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May 23, 2010 10:03:39 GMT
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I'm moving workshops soon and my compressor will be up for sale, it's a 272 litre SIP with twin motors, I paid £450 for it a couple of years ago but would take £300 from a RRer not sure what it flows but I'd hazard a guess at 'kinlots ;D
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May 23, 2010 12:19:41 GMT
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ok if yor using air tools a big tank it very usefull as it minamises the time you have the thing running , for painting its not so much as you use the air at a much lower pressher than the tank is at , i use a 80L with a 9 cfm pump on it and it runs the air impact wrench no worries , but it is only any good for 1 tool at a time
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cars that i own , 1978 Porsche 924 2.0 8v and a 2000 alfa-romeo 156 2.4 jtd 150bhp with option pack 3
i dunno I'm a electrician so don't ask me
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May 23, 2010 21:03:55 GMT
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In just replaced my 14CFM 3hp SIP as it was getting very tired. I got it probably 12 years ago now and it was s/h then. The new one is a 15CFM 3hp from www.shiremoorcompressors.co.uk. I chose them as the units they supply are their own so I figured they would have more of a vested interest in them being good quality and reliable. I spoike with a guy there on the phone before buying and he was very helpful, provided me with loads of help and info and gave no hard sell at all. I am very impressed with it so far. It runs cool even when using a DA for prolonged periods. I don't get much moisture out of it and it seems to be pretty sturdily built. The belt guard and even the motor cover are metal rather than plastic. They've been making this tried and trusted design since the mid 80's and have every part in stock for them. It cost a bit more than the equivelent from machine Mart but I doubt the quality from MM would be much cop and if it did break down I can just imagine how unhelpful MM would be. As for buying if eBay. I wouldn't even consider it on something like a compressor.
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1962 Datsun Bluebird Estate - 1971 Datsun 510 SSS - 1976 Datsun 710 SSS - 1981 Dodge van - 1985 Nissan Cherry Europe GTi - 1988 Nissan Prairie - 1990 Hyundai Pony Pickup - 1992 Mazda MX5
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