Hi,
I've been given a small compressor and air tools but they don't seem to be anything like as powerful as I'd thought. The main problem is lack of torque from the impact wrench. It couldn't even undo the wheel nuts I'd tightened with a standard wheel brace. The compressor (2hp 50ltr) seems to fit the requirements of the impact wrench (90psi 4cfm 230ft/lbs) so what am I missing? The bore of the hose and regulator output seem reasonable. I've noticed that some garages connect straight to the tank instead of through the regulator, is this to get the necessary airflow? Seems a bit risky to me though.
I've searched the web but found nothing in the way of advice. I'm sure some backroomers must have practical experience, any advice would be gratefully received.
Thanks.
Steve
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I have a similar compressor, and although it's theoretical output is over 100psi, it's limited to about 60.
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Steve
Airflow is everything with hammer guns. It's not the pressure in the tank that matters; it's the pressure at the gun under load.
A pressure reg is useful for spraying, but too restrictive for a high-demand tool like that. What's the cut-off switch pressure on the receiver set to: 90 lbf/sq"? If it's that low [workshop compressors are 150 or even 250] you'll need a big [min 1/2" bore] hose and a high-flow tap [gate-valve? washing machine valve?]and big connexions to stand any chance at all.
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Don't run it thro' the pressure regulator;I took the big plug out of the end of the tank and with some plumbing fittings connected direct to a rubber hose.Don't use the plastic convoluted hose supplied in the kit.It's not big enough.Also, most of these guns have a flow controller on the bottom of the handle in front of the air hose connector-set it to maximum.
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You should have one regulated and one unregulated coupling,use the unregulated.You could also convert to euro connectors which give better airflow,as long as you have a decent hose to go with them.Ultimately impact wrenches need a lot of air,I use a nut runner and the comp.struggles to keep up with that.
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Yup, all down to airflow. When I used to pop the hose off my 25L tank, it used to take quite a long time to empty. Now with larger connectors and bigger ID pipe, it empties (loudly) and a second or so.
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Thanks for the info, it sounds as though I need to remove the plug in the end of the tank and plumb in a connector. Fortunately I bought a few bits at the weekend from machine mart so I may have the parts already. Maybe just a suitable bush and a quick connector will do the job. I just need to keep the bore size in mind.
Once again thanks!
Steve.
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Tool quality counts for a lot as well. Until recently I have been using a CP windy wrench. As these things go, it was quiet, smooth, comfortable to use and it did the job. It was getting a bit tired though so I bought a well known cheaper make. This thing is useless ! It thrashes around making lots of noise and vibration but won't budge anything much more than finger tight. Another new CP is ordered.
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Is that Chicago Pneumatic? I've noticed that there's a lot of difference in prices. SIP do wrenches from about £40 whereas Ingersoll Rand ones are far more expensive. Do you know how much difference a dual hammer wrench makes, is it smoother or more powerful?
I'm shortly to be given a Toyota Master Ace Surf that needs engine work so I could do with some tools to help with the project.
Thanks for the comments.
Steve.
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Glowplug, I'm almost certain it's Consolidated Pnuematic. Our tool supplier normally keeps only Sealey or Draper stuff 'on the shelf' so he's ordered one.
As you say, there are different types of 'innards' but I don't know enough about the different types to comment. It seems that with the lightweight gear a lot of the available air pressure is used creating noise and vibration, whereas with the better gear it creates torque. Action and reaction I suppose !
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I bought a DeVilbiss air impact wrench in the US mainly because it was about half the price of the same tool here.It works well when you have sufficient airflow-the people with "toy" compressors would probably be better off with the wheel nut remover that clips to the battery.What I have noticed is that my wrench also appears in Machine-Mart,Draper,Clarke,Screwfix,Snap-on and probably a few other suppliers catalogues,identical even to the patterning on the grip-only difference is the lable.Looks like they're all from the same factory-China???
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