I’m no expert but I don’t think road compressor produce the right pressure. Something to do with cfm? Somebody did explain to me once but I’ve forgotten what I was told.
What size compressor for a impact gun.
- Thread starter Sprayer 1
- Start date
- Location
- Darlington
They have taken a hell of a lot of wheel nuts off for me in the last 20 + years among other stupid asks.
Lakesdigger
Member
Its both that you need. You need the volume to ramp the pressure up fast enough when needed at which point you need pressure and lots of it.
- Location
- Darlington
Mine runs at about 120 psi
Lakesdigger
Member
I think most do tbh but think wettest another 40psi would do. I don't recommend adjusting it mind
Lakesdigger
Member
Don't forget airline isn't big id so another 40psi would be a fair bit more flow
- Location
- Darlington
Even the dual vote 1/2 " battery gun plays with the tractor wheel nuts so I think the compressor will be relegated to blowing kits off.
- Location
- Essex/Herts Border
We were refurbishing our sprayer bowser last year built from a lorry trailer chassis and axles. Wheel nuts were well stuck on, out of 40 nuts our 3/4 air impact gun got about 30 of them off, we got the local tyre guy out with his 1 inch air impact to finish the job but he could only do another 4 of the remaining 10, borrowed a 1 inch milwaukee 18v impact from a local lorry guy and that got the remaining 6 nuts off. Incredible piece of kit but it ate 8ah batteries for fun so was using a lot of power! But if I could afford it I would have that over air power and hoses and compressors that don't like cold weather any day!
- Location
- Aberdeenshire
Local mechanic explained windie guns and compressors to me in yokel terms. I think AvE on Youtube did so too. The gun manufacturers quote X cubic feet/minute input required of compressed air at Y PSI. The compressor manufacturers quote X cubic feet minute at their input which is considerably less when compressed to Y PSI, so if the gun says it needs 6cfm then a compressor which says 6 cfm won't do. It's duplicitous but legal. My units may be off but I hope you get the jist of what I mean. If you mean to buy a compressor check out very carefully what they actually offer in real terms.
the big miwaukee 1 inch gun is right up there with any air powered gun, unless you have a £10000 compressed air setup. the only thing cordless cant replace is hydraulic torque wrenches (can be 50,000Nm) but that isnt something tyre fitters would have
Last edited:
- Location
- Ballyclare Northern Ireland
Compressor manufacturers quote the capacity cfm (cubic feet per minute) as FAD (free air delivery) in lay mans terms capacity with no load at 0 psi. Tool manufacturers quote consumption cfm at rated pressure usually 10bar/145psi.
cfm decreases with increase in pressure. The relationship is linear meaning a compressor quoted as doing 10 CFM at 60 psi will only do 5 CFM at 120 psi.
So to sum it up buy a Milwaukee 1 inch drive or Makita 3/4 drive cordless.
These guys test and explain them all.
cfm decreases with increase in pressure. The relationship is linear meaning a compressor quoted as doing 10 CFM at 60 psi will only do 5 CFM at 120 psi.
So to sum it up buy a Milwaukee 1 inch drive or Makita 3/4 drive cordless.
These guys test and explain them all.
Courier
Member
- Location
- M62 - M1 - M18 triangle
Most pressure is available as a compressor is approaching switch off point.
The pressure in the receiver can vary by 30 to 40 psi.
smcapstick
Member
- Location
- Kirkby Lonsdale
ACEngineering
Member
- Location
- Oxon
they dont like JCB nuts due to the counter sink but otherwise they will ripp 99% of nuts off farm stuff
ACEngineering
Member
- Location
- Oxon
There getting closer though
Still lacking a bit of power compaired to a decent branded air one but its not a bad effort!
flywheel
Member
- Location
- wae up north
This is what I bought 2 Yr ago... Neighbours 3/4 battery impact would nt shift trailer wheel nuts but this animal took them off no problem.
