Tailwheel vs impact gun

[Soundguy]

i agree.. and just figure that into the equation at 80% and go..

 

[SPYDERLK]

The gallons of reserve you have dont much matter. You have to have a pump that will keep up. If it wont keep up, you could put your pump on a 60 gallon tank and it still wont keep up. It will just take a little longer before it falls behind enough that performance suffers.

But even if it is a small mpum and small tank, 2 gallons with a good gun should be enough to break loose a fastner. And then once loose, even if it drops down to 40 psi, should still be pleanty to back it the rest of the way out. You might just have to wait a minute or two to charge back up to attaack the next fastner though. But with a 2 gallon tank, it should take long to build back up

Agood real world statement for a clean fastener in a totally ridgid setup. Itll loosen on the 2nd or 3rd hit. A little bit of sustained resistance tho, wouldkill too much pressure in a 2G volume unless the compressor was adequate and running.
larry

 

[Soundguy]

Agood real world statement for a clean fastener in a totally ridgid setup. Itll loosen on the 2nd or 3rd hit. A little bit of sustained resistance tho, wouldkill too much pressure in a 2G volume unless the compressor was adequate and running.
larry

just like in the engine world.. there's no good replacement for displacement..

 

[94BULLITT]

I'm sure all are rated under ideal conditions; temperature, humidity, air pressure, size and length of hose, new tool with precise lubrication, etc. and you and I aren't likely to exactly replicate those conditions.:laughing:

I would use ideal very loosely. My 3/8 impact is supposed to torque 425 in reverse @ 90psi but I know it won't and I run it at 150psi. I have a porter cable battery set: recip saw, drill, impact etc. I think it is supposed to torque 133lbtf. It only torques 35 40lbft with a full battery.

 

[Bird]

I would use ideal very loosely. My 3/8 impact is supposed to torque 425 in reverse @ 90psi but I know it won't and I run it at 150psi. I have a porter cable battery set: recip saw, drill, impact etc. I think it is supposed to torque 133lbtf. It only torques 35 40lbft with a full battery.

Your 3/8 impact is rated at 90 psi and you run it at 150 psi. Maybe you've worn it out.:laughing:

I don't doubt that you're right, but I do wonder how you determine how much torque they have. Even when I was in the business of repairing air tools, I couldn't afford the kind of equipment that would accurately measure their torque.

The things that keep air tool repairmen in business are: (1) running higher air pressure, (2) moisture in the air going into the intake, causing corrosion, (3) inadequate lubrication, and (4) dirt and debris going into the air intake. The higher than 90 psi air pressure will give you more power, but also more wear and sometimes actual breakage internally. But for many mechanics, it's worth the extra cost to have the extra power.

 

[94BULLITT]

Your 3/8 impact is rated at 90 psi and you run it at 150 psi. Maybe you've worn it out.:laughing:

I don't doubt that you're right, but I do wonder how you determine how much torque they have. Even when I was in the business of repairing air tools, I couldn't afford the kind of equipment that would accurately measure their torque.

The things that keep air tool repairmen in business are: (1) running higher air pressure, (2) moisture in the air going into the intake, causing corrosion, (3) inadequate lubrication, and (4) dirt and debris going into the air intake. The higher than 90 psi air pressure will give you more power, but also more wear and sometimes actual breakage internally. But for many mechanics, it's worth the extra cost to have the extra power.

I have ran my snap on air tools for years at 150psi with no problems. I checked the porter cable battery impact with one of these. It has a peak torque setting, which shows the max you torqued on that fastener. So I tightened a wheel lug nut with it the battery impact and loosened it with the torque adapter. I have verified the torque adapter is accurate with a snap on torque wrench. I have never checked the air impacts but I seriously doubt the will torque what they are rated but they are still extremely powerful and fast.

 

[Soundguy]

it's all academic as long as you buy one that does what you want.

what's on the package is long discarded in the trash once you got the tool that works.

 

[shona13]

G,Day rx rated .
I have a real good socket wrecking wrench and depending how much weight you put on it you could even shear of a 3/4 " bolt !!!!!!!!!!!and it does not need a compressor.
Happy days.
Hutch.

 

[raptor749]

Go to searsparts.com and look up the model impact you have. Should give you a complete diagram and parts break down. Hope this helps..:cool2:

 

[TraderMark]

Something that a lot of guys don't know about air tool ratings is the fact that the 90psi should be measured at the tool INLET. To check correctly, tee a gauge into the airline at the tool inlet then pull the trigger on the tool. It will amaze you how the 120-150 psi @ the tank falls far short of being 90 psi at the tool inlet with the tool running.

I've used Mac AW234 & AW434 impact wrenches all my adult life. I had to run my compressor @ 195 tank psi and use a 1/2 air hose to get the full 90 psi at the inlet. But I could break loose bolts that other guys couldn't dream of breaking.