Air impact gun and compressor

[God mode restorations]

 

[God mode restorations]

 

[God mode restorations]

Was the biggest I could get to run off 13 amp. They make a 200 version but it's the same.

 

[normspanners]

Most DIY compressors aren't capable of supplying that pressure and volume though so it's not going to be the airlines or fittings holding you back.

?? I would say every diy compressor will give 100psi mine goes to 160 psi all day

 

[normspanners]

that airline will never run a 1" gun btw my snap on 3/4 gun needs 1/2 " line and 100 series pcl's to get any sort of power

 

[God mode restorations]

that airline will never run a 1" gun btw my snap on 3/4 gun needs 1/2 " line and 100 series pcl's to get any sort of power

I have a half inch airline. What's pcls

 

[normspanners]

the problem is the standard pcl reduces the air flow, so whilst it 'might' flow 43cfm in theory to free atmospheric pressured air, the restriction caused by the air deviating around the coupling limits the usability, in fact any bend in the airline will reduce flow to some extent.
only yesterday I tested the advertised as 'most powerful gun ' 1/2" sealey air gun at, 'in theory' 1600 NM I tried it on standard pcl and 10mm line but a cordless milwakie fuel nut buster beat it easily.

 

[normspanners]

I have a half inch airline. What's pcls

the QR fittings on the compressor this is normal

this is the 100 series at least twice the size

 

[God mode restorations]

Right.. understand now.thanks for the information.

 

[Jim Davey]

?? I would say every diy compressor will give 100psi mine goes to 160 psi all day

Not at 45cfm.

 

[normspanners]

Right.. understand now.thanks for the information.

also even though you have a 1/2"dia air line the 1/4 bsp pcl fittings are roughly less than a 1/4 of the dia, so the airline is immediately restricted to 1/4" before any air gets into the pipeline!! then you have in total two pcls to get through.
so whilst it will run the gun to free air the power/ torque required is not there.

 

[normspanners]

Not at 45cfm.

it will------ till the tank pressure drops to the pressure that will not support 45 cfm ---- it is the instant flow that is required to break nuts free with an impact gun.
A little like towing a stuck car out of a rut with a tight tow rope, and it will not pull it, the tow car just spins the wheels, give it a little slack and use the weight of the car with a little snatch and it moves, it is the inertia of the air that seems to hit the guns anvil harder.

 

[normspanners]

To be honest I have never really been a fan of cordless I use them and had the first makita ones that came out 30 years ago but that milwakee is impressive it cracked a drive shaft bolt with me just holding the drive shaft, with the air gun I had to put the disc bolts back in, to help hold the cv to get a more solid hammer, but it would not undo it.
the cordless just laughed at it and it had done 4 wheels off and on and then 4more off prior to the 'test'

 

[Jim Davey]

I don't think you will get 45cfm out of a hobby compressor at any point, due to the size of the regulators and fittings they use, and even if you could, the relatively small tank size is going to cause a rapid loss of pressure that the small motor can't hope to overcome. The only answer is a large receiver and bigger diameter pipe and fittings, then wait for pressure to build again once it drops blow the point the gun stops working efficiently.

 

[normspanners]

I don't think you will get 45cfm out of a hobby compressor at any point, due to the size of the regulators and fittings they use, and even if you could, the relatively small tank size is going to cause a rapid loss of pressure that the small motor can't hope to overcome. The only answer is a large receiver and bigger diameter pipe and fittings, then wait for pressure to build again once it drops blow the point the gun stops working efficiently.

Thanks Jim
Well if I let the air out through my pcl fitting it takes a certain length of time to expel all the air, so the flow through the fitting MUST be at its max for a period of time otherwise it would just be at zero immediately, so at the immediate time of opening the valve it must be flowing its ever decreasing max. Also it doesnt matter the size of the tank for the immediate burst.

due to the size of the regulators and fittings they use, and even if you could, the relatively small tank size is going to cause a rapid loss of pressure that the small motor can't hope to overcome.

If you read the earlier posts that is what most people have been saying from the get go.

 

[God mode restorations]

OK. So technically I have fked up . Well I have paid for the gun so I will wait until it arrives and see what I can do with what I have got. A bigger compressor would be better. But only have 13 amp supply here. If it doesn't work then I have a inch drive breaker bar and impact sockets .

 

[normspanners]

I have a small suitcase compressor 4cfm that I couple to a small seperate receiver for portable use and it will run my large air gun and undo nuts the only problem is I have to pause and let it recover before the next wheel. or heavy bolt etc.

 

[normspanners]

OK. So technically I have fked up . Well I have paid for the gun so I will wait until it arrives and see what I can do with what I have got. A bigger compressor would be better. But only have 13 amp supply here. If it doesn't work then I have a inch drive breaker bar and impact sockets .

No mate all you will need is a fitting direct off the end of the tank/ receiver, use 100 series female and a large dia air line, it will do the job it will just need time,also if you have only 1ph, the next step would be an engine powered comp. but they bring other problems to the party
the thing to do is crack the first nut but dont run it off, wait a second or two ONLY if the pump is running ,then crack the next nut, and so on, you will find it will only crack them at near max pressure leave all the running off of the nuts to do easily because they are now slackish and with the compressor running it will hopefully keeping pace with the gun, as I say a second class ride is better than a first class walk .
let the gun do the work.
Even a 25cfm compressor will run out of breath on a 1" gun !!
I have seen mobile truck tyre fitters allways having to wait for the diesel compressor----

 

[God mode restorations]

No mate all you will need is a fitting direct off the end of the tank/ res, use 100 series female and a large dia air line, it will do the job it will just need time,also if you have only 1ph, the next step would be an engine powered comp. but they bring other problems to the party
the thing to do is crack the first nut but dont run it off, wait a second or two ONLY if the pump is running ,then crack the next nut, and so on, you will find it will only crack them at near max pressure leave all the running off of the nuts to do easily because they are now slackish and with the compressor running it will hopefully keeping pace with the gun, as I say a second class ride is better than a first class walk .
let the gun do the work.
Even a 25cfm compressor will run out of breath on a 1" gun !!
I have seen mobile truck tyre fitters allways having to wait for the diesel compressor----

OK awesome.. am I still safe to connect and disconect even thoe I am running off the end of the tank. Just dubious about air equipment. And like to understand all that could a can go wrong .

 

[normspanners]

your priority is to check your differential pressure and adjust it to it's minimum ie the pump shuts off at 150 but will not kick in till it drops to 100 (Usual) that is no good you need the pump in and working as soon as the pressure drops to 135 ish so it takes less time to get back up to 150 !