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joako
Premium
join:2000-09-07
/dev/null
kudos:6
Reviews:
·Comcast

Decent Compressor and Impact Tool?

I've bought these items:

* MSI-PRO SM-403 Pneumatic 1/2-Inch Industrial Grade Impact Wrench
* Portable Air Compressor, 2 Horsepower, 8 Gallon, 125 PSI
* 25 ft 3/8" Air Hose
* Oil/Water Separator
* 3/8" Oil Fog Lubricator

I removed the quick-connect from the compressor and connected the oil/water separator followed by the oil fog lubricator and attached the quick connect fitting to its output. I filled the oil fog lubricator with automatic transmission fluid as per the instructions from the impact wrench.

I have attempted to remove wheel bolts with a 17mm impact socket and no other attachments but half of them will not come off. Then I tried to reinstall the bolts with 110NM (80 ft-lb) torque stick. I then set a torque wrench to 80 ft-lb and notice that the bolt still needs some turning to reach 80 ft-lb.

So, what's the problem here? I suspect I need a stronger compressor with a larger tank.
--
PRescott7-2097



cdru
Go Colts
Premium,MVM
join:2003-05-14
Fort Wayne, IN
kudos:7

said by joako:

So, what's the problem here? I suspect I need a stronger compressor with a larger tank.

Your compressor is rated at 4CFM @90 PSI. My guess is that it can deliver that for about 1/10th of a second immediately after a full recovery. A bigger tank or at least a secondary tank might help, but then you're just prolonging your recovery time. But a insufficient compressor is likely the culprit.

Also don't use torque sticks. They aren't accurate for general use, and definitely not accurate enough for any type of legitimate comparison to a real torque wrench properly calibrated.

itguy05

join:2005-06-17
Carlisle, PA
reply to joako

Try upping the pressure. Each of the fittings and the separator/lubricator will drop pressure. You may want to try 100PSI at the tank.


PrntRhd
Premium
join:2004-11-03
Fairfield, CA
Reviews:
·Comcast
reply to cdru

said by cdru:

said by joako:

So, what's the problem here? I suspect I need a stronger compressor with a larger tank.[/bquote

Also don't use torque sticks. They aren't accurate for general use, and definitely not accurate enough for any type of legitimate comparison to a real torque wrench properly calibrated.

Agree, torque sticks are useful only with air wrenches that match the sticks exactly (certain Chicago Pneumatic models)

Beezel

join:2008-12-15
Las Vegas, NV
reply to joako

Your compressor is way to small for any impact wrench. you will need at least 30 gal. of air capacity with keeping up with the demand, and it will still be only short bursts. But it will take proper torqued auto lug nuts off. The more HP rated will allow faster recovery of the pressure, etc..



Subaru
1-3-2-4
Premium
join:2001-05-31
Greenwich, CT
kudos:1
reply to joako

Don't know if it's been said but stay away from PVC air hoses! It always wants to stay in a coil and I found out the hard way..

And I agree with everyone I have a 10 gal and I can go about 10 sec max of using the tool on say a stuck bolt and I have to wait for it to recharge (10 gal tank) If you can try to find used as that's what I might try to do but the tanks are heavy and new they cost a arm and leg for simple stuff.


Beezel

join:2008-12-15
Las Vegas, NV

said by Subaru:

Don't know if it's been said but stay away from PVC air hoses! It always wants to stay in a coil and I found out the hard way..

Try one in the freezing cold and see how well it works.


Subaru
1-3-2-4
Premium
join:2001-05-31
Greenwich, CT
kudos:1

Haha The first and last time I used it was in Feb 2 years ago and that was enough to make me stop using it.. and I think it was only some 40F out then.. it drove me nuts, 12 F you can forget about it!



TheHarvester
Premium
join:2006-08-25
Dana Point, CA
kudos:3

1 recommendation

reply to joako

Personally, I think the biggest problem would be the impact itself. I have seen many new mechanics buy those type of impacts and even with our 160 gallon compressors (we have two 80 gallon compressors attached to our air lines but only run one unless someone is using the bead blaster) they just don't have the balls to bust some lug nuts loose. I have broke loose C/V axle nuts with my dads old 1/2 hp 5 hallon compressor and an Ingersoll-Rand 231 impact. It took a few attempts with letting the compressor re-fill but it got it off.
--
mbsastronomy.com



mattmag
Premium,ExMod 2000-03
join:2000-04-09
NW Illinois
kudos:3
reply to joako


+1 to what TheHarvester See Profile said.

With all due respect, a $60 impact gun is a poor choice for power.



shdesigns
Powered By Infinite Improbabilty Drive
Premium
join:2000-12-01
Stone Mountain, GA
Reviews:
·Atlantic Nexus
reply to TheHarvester

Your dads old 1/3HP compressor probably has much more airflow that most modern cheapies. Most come with cheap 1/4" regulators that can not maintain pressure with any airflow.

My Craftsman 6HP/60 gal would not run an impact wrench util I upgraded the manifold and air regulator to 3/8 fittings.

You need at least 3/8 hoses and fittings for an impact gut to be effective at all and the shorter the hose the better. I find I can get away with a 1/4 quick disconnect but do plan one moving to 3/8"
--
Scott Henion

Embedded Systems Consultant,
SHDesigns home - DIY Welder



hortnut
Huh?

join:2005-09-25
PNW
kudos:1
Reviews:
·Comcast
reply to joako

To add to the other comments regarding size of hoses and other components, believe there are other factors to consider:

The Impact Wrench: Air Pressure (PSI): 90. Air Consumption (CFM): 4.

The Compressor is rated - 4.5 CFM @ 90 PSI. And it is only 8 gallon, so not much reserve.

Myself I would want a beefier Compressor with better specs. Personal opinion, HB fudges specs, therefore buy little from them.

I have a Senco SKS-L Crown Stapler and dedicated compressor for it from Costco picked up 20+ years ago. It is similar to yours and at times need to pace myself to not run out of air. Can't find the CFM Specs for the Stapler. It is hooked up to 115 feet of hose to get to the end of the Greenhouses. It does not need oil or regulation of pressure, so do not have those pressure drains on it.

hth



joako
Premium
join:2000-09-07
/dev/null
kudos:6
Reviews:
·Comcast
reply to joako

I can get the 29 gallon HF compressor for $349 but I have a feeling it would be a little underpowered.

Would this be any good? »www.homedepot.com/buy/husky-60-g···01h.html
--
PRescott7-2097



Subaru
1-3-2-4
Premium
join:2001-05-31
Greenwich, CT
kudos:1

Would be better but it's 240V which most would agree is better anyways.