lewist123
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Mar 28, 2009 13:38:03 GMT
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I run mine at 100 psi, basically flat out
What cfm is the aldi compressor, thats free flowing cfm?
Mine is just about 11 cfm free air, and you do need to allow it to catch up every so oftern. You also need to check the duty cycle of the compressor. Make sure you don't overdo it and burn it out.
Lewis
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slater
Club Retro Rides Member
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Club RR Member Number: 78
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Mar 28, 2009 16:04:47 GMT
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You need a proper comperssor for blasting, don't waste your time if you have the aveage garage type job. Your talking 100s of CFM for any kind of useful setup i would think, wouldnt bother at all if its under 50cfm.
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Mar 28, 2009 16:07:40 GMT
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I've tried blasting with a 12cfm compressor and it didn't really work. That was with a proper gun / cabinet setup. Constantly waiting for it to catch up, took about an hour to blast the face of a 10" mini wheel!
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1997 TVR Chimaera 2009 Westfield Megabusa
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lewist123
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Mar 28, 2009 16:41:32 GMT
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Slater - 50cfm.... christ that is excessive
My dad runs an aluminimum anodising plant. They have a 100 cfm air setup that runs 5 blast cabinets and a load of other stuff.
50 cfm is way ott of the home setup. granted its never going to be up to the standard that a pro place will be, but we are talking about diy garage stuff here!
Lewis
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lewist123
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Mar 28, 2009 17:39:27 GMT
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Well i just did a quick vid of my setup. It blasted the gack off the head ok, but it was quite grimey which causes the sand to stick rather than blast. It cuts paint like butter.. look Here is a close up of the rocker cover post balst This is a 2.5 hp compressor with 50 ltr reservoiur and cheep £20 sand blasting gun. I would suggest you don't try spraying with out a cabinet of some sort though, still shaking sand outa my hair! Lewis
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slater
Club Retro Rides Member
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Club RR Member Number: 78
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Mar 28, 2009 18:58:04 GMT
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Well ofcourse its all relitive, if you just want to do a bolt or one bracket or something then your not going to need much air but once you attulay get to using it for real your going to get very bored/curse word off and wish you never bothered in the first place! I live in the real world, blasting at home is not practical and people have a wildly optimistic impression of how much time/effot/energy it takes. This whole thread is proof of that.
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lewist123
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Mar 28, 2009 19:05:43 GMT
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Does my vid above not prove that a home setup does work?
If one expects it to blast grease off, it won't, If one expects it to blast power coating, it struggles, but for freshening ally and steel parts up, it is completely satisfactory.
As i say, my dads pro setup is no more powerful than mine, the difference being that it can run all day long.
Lewis
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Mar 28, 2009 19:30:21 GMT
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thanks for the video , thats kinda what i expected from mine
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91 golf g60, 89 golf 16v , 88 polo breadvan
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lewist123
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Mar 28, 2009 19:38:54 GMT
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I don't know what gun you bought, but a spot gun will do just that, spots only.
this is a sand blasting gun. £20 from halfords i think and gobbles lots of air and sand.
What are the specks from the compressor??
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Mar 28, 2009 20:02:47 GMT
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i'll have to look up the comp specs
how long does a tank of sand last you...mine does a tank full in prob less than a minute
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91 golf g60, 89 golf 16v , 88 polo breadvan
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lewist123
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Mar 28, 2009 20:07:56 GMT
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About the same with mine, maybe a touch longer.
That is one of the reasons you need a cabinet. Gets costly, even with cheap sand, if you just let it go everywhere.
If the specs of the compressor are around 10cfm and/or 2.5 hp, then it should be able to run a bigger gun. Just get a bigger gun from screwfix or somewhere like that.
If its less than that, it won't be able to keep up.
Still, the air compressor will still be good for an air impact gun and other such tools.
10 cfm is also big enough to run a spray gun. I have had some reasonable results (not on a car yet) with a cheap suction based spray gun. A gravity gun, i think, would work better.
Lewis
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93fxdl
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Mar 28, 2009 21:09:28 GMT
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a few years ago part of my job was repairing and setting up a couple of industrial cabinets so have had quite a bit of fun getting the best out of the equipment the trouble is there are several variables which have a large effect on the results acchieved the first being the type of grit used, proper grit will give the most aggressive clean going down to crushed walnut shells which give a very mild clean but if any residue is left behind inside your engine dosent cause any damage (supposedly) but then you have the size of the grit as a large grit gives a more aggressive clean than small next on the list is the flow of abrasive as reducing the grit flow makes the blast more aggressive and finally the air flow, so by following this if you want brutal blasting use a proper grit select a coarse grade, reduce the grit flow and turn up the air flow I have an aldi compressor and have found it is adequate for most jobs I have thrown at it but to be honest it does struggle with heavy demand tools but upon investigation have found that the connectors supplied are somwhat restrictive so you may be better of hard lining your blaster also other options are plumbing in an extra tank (am in the middle of turning an old gas bottle into one) also I have a 2 horse 50 litre compressor as well and if I get realy hacked off with recharge times I will just plumb them together oh and also the distance from nozzle to workpiece changes the effectiveness of your blasting but home use kit pretty well has to be right up against the work so you only clean a small area at a time and as soon as you move back to cover a larger area you lose cleaning power another helpfull tip is make sure the air is dry as moisture messes things up ttfn glenn
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Last Edit: Mar 28, 2009 21:10:45 GMT by 93fxdl
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