Thread: Compressor advice
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01-05-2016 #1
My Lidl 2.5hp 25ltr finally died after many years of good service, but it was too loud to chat with someone while it was pumping. I've replaced it with a Workshop Sealey 3hp 1ph, 100ltr beltdriven job. Retail is 600 but got a good deal on ebay for 270 and its looks new. Although 100ltr is a largish tank, this Sealey one still comes on wheels so can be moved around very easily.
I find that belt driven reduces the noise level while charging, as now I can communicate with others to pass the size 17 spanner. Another point I liked is that the lidl compressor charge upto 8bar, the new compressor charges upto 10bar. I adjusted the kick in to 7bar, so the compressor doesn't switch on that often. Another good addon is to plumb in a 'T' connector after the regulator and have both types of compressor connections, euro and pcl.
Adil
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02-05-2016 #2
Belt driven is the way, if more money is decided to be invested. Its much more quiet.
El cheapo in the £70 range could be silenced in a box without any problem. Have seen that. A friend has that setup.
I am greatly against the direct driven V head compressors in the 150-500 range cause they are scam. First of all they will not deliver the promised ~300l/m , that means not all air tools will work properly. Secondly they are noisy, third they will die fast in an industrial environment. So whats the point wasting money on them.
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02-05-2016 #3
For chip clearance and mist lube on the benchtop CNC I'm using a refrigeration compressor, it's silent and works very well.
- NickYou think that's too expensive? You're not a Model Engineer are you? :D
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The Following User Says Thank You to magicniner For This Useful Post:
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05-05-2016 #4
Proof that doing a good turn now and again can be beneficial, a couple of years ago got an urgent call on sunday morning from a friend who had employed a company to refurbish a dental pratice due to open next morning, the Polish or Romanian sparky I never met them had managed to fit every socket and switch upside down, all taps had also been fitted on wrong hand. Spent a good few hours fixing problems and got a sparky to safety check whole system. Was paid well for my efforts but a bonus arrived today, another practice being refitted so a gift of a nice quiet 24l Bambi 6 months old turned up, a vertical dome shape so takes little room and will fit nicely inder the mill bench. I did drop a little hint when I specced out his LAN the other week but a welcome gift.
As compressors go its quieter than my chest freezer so ideal when trying to run a quiet shop (in a first floor flat with children sleeping in flat directly below). First impressions well engineered and perfect for my needs, if low noise level is your requirement, I could certainly recommend a visit to the dentists after they close! Or maybe opt for the Bambi and pay the extra.Last edited by lucan07; 05-05-2016 at 05:24 PM.
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05-05-2016 #5
As it happens, I have just had to have the compressor replaced in my fridge/freezer (this afternoon) and I shall be trying that out. Of course, the thing might be faulty anyway, but nothing lost if so. Just goes to the dump on my next run. Thanks to magicniner for the suggestion - I would not have expected it to have the air flow needed but it sounds as if it's worth trying.
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05-05-2016 #6
May be possible to use an old calor bottle for a tank to solve flow issues.
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07-05-2016 #7You think that's too expensive? You're not a Model Engineer are you? :D
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16-05-2017 #8
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07-05-2016 #9
Nozzle size is critical, with low flow but a small nozzle you can generate a high pressure & speed at the nozzle and surrounding air will be drawn in and add to the mass of air shifting chips.
I experimented with a variety of ideas, you can grease a length of piano wire and use a 3-jaw lathe chuck to crimp copper pipe down to a nozzle of known size, eBay is a good source of canula needles which are also good,
- NickYou think that's too expensive? You're not a Model Engineer are you? :D
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