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| | | | Joined: Jan 2007 Posts: 136 Wrench Fetcher | | Wrench Fetcher Joined: Jan 2007 Posts: 136 | Does the hose diameter and overall hose length influence the performance of pneumatic tools?
I read somewhere that if you have more than 10' of hose; you need to increase the diameter.
Currently I am using a 20'1/2" diameter hose and the physical distance from the compressor to the tool is less than 10'. The compressor is a 60 gallon Husky (home Depot) compressor with a max output of 125 psi.
I am wondering what is going on, because my DA sander dies out quicker than I thought it should. Is the hose influencing my problem or is the compressor just not strong enough?
Thanks in advance for any comments!
Ross | | | | | Joined: Jul 2004 Posts: 5,708 'Bolter | | 'Bolter Joined: Jul 2004 Posts: 5,708 | Ross,
If you are using a 1/2" ID hose, which is usually how they are identified (ID) then I think something else is wrong. 3/8" is pretty common in my shop and it powers everything using lengths of 20 feet and longer.
My info says that 100 feet of 3/8" hose will pass 25 CFM at 125 lbs. It looks like the average DA uses between 11 and 13 CFM. If these figures are correct, I don't think it is the hose that is strangling your sander.
Stuart | | | | | Joined: Jun 2005 Posts: 1,756 Shop Shark | | Shop Shark Joined: Jun 2005 Posts: 1,756 | The size of the tank doesn't have much effect on the whold picture, How many CFM is it putting out at 90lbs?? D.A.'s are notorious for using a bunch of air, You probably should have over 12 CFM to run it efficiently. | | | | | Joined: Aug 2005 Posts: 6,377 Ex Hall Monitor | | Ex Hall Monitor Joined: Aug 2005 Posts: 6,377 | Gazim is correct. Most folks make the mistake of buying a high PSI compressor without taking the capacity (CFM) into account. I'd guess your DA is simply using more air than your compressor can supply at the required pressure.
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| | | | | Joined: Jul 2005 Posts: 169 Wrench Fetcher | | Wrench Fetcher Joined: Jul 2005 Posts: 169 | You really to gauge your hose size by the ID, which is inside diameter.
5/16 ID will flow just fine, and pretty much standard in body shops. 1/4 will work and if thats what you got I wouldnt worry about it because its only 20 ft long.
At 20ft and 1/4 ID you wont notice any PSI and CFM drop to affect a da.
But your compressor is under powered and the da is using more air then what it can produce. | | |
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