Modifying an Impact wrench for more torque (2nd attempt) 

Here are some links to good impacts: AIRCAT 1150: amzn.to/41TSAC7 Ingersoll Rand 2235TiMAX: amzn.to/44ki39C Ingersoll Rand 231C: amzn.to/3ViLeFX

The number one thing you could’ve done was to polish the inner diameter of the vane contact service. Rotary vane devices suffer major leakage which is where the veins contact the inner periphery of the cylinder. This is their major source of power loss By simply polishing the inner peripheral of of where the vanes actually contact, and then polishing the vein tips would have the most drastic affect. You were trying to create more airflow when you needed to fix the sealing of the vane tips.Even microscopic scratches cause major league age of the air pressure around the vanes. So instead of 100 psi or whatever you’re using pushing on the back side of the veins, you’re only getting like 70 psi exerting force on to the vanes. Also the only thing that pushes the veins out word is air pressure and centrifugal forces, by also utilizing springs underneath the veins this also greatly AIDS and sealing the vein tips to theHousing. If you take apart any vein type air motor, ones that put out up to 9 hp, all use some type of a spring mechanism to push the Veins more forcefully to create a better seal. The rotary Vane Are positive displacement devices which means they operate on pressure more than airflow.

This will hammer down, son

I've always wondered if they could be improved. I purchased a couple of cheap ones off a clearance table tears ago for peanuts. I couldn't believe how bad they were compared to my better guns. Thanks for saving me some time.

Send it to the torque test channel and get a new one, just to see if the mods made a difference. The airflow was cleaned up massively, the hammer mechanism in there is what is holding it back

Very nice 2 part video, and quite detailed. It is my opinion that the power delivered is a result of the hammer/clutch and air delivery to the tool. Having larger "openings" will increase air flow, but will also reduce pressure. I would suggest leaving the internals as-is (except cleaning and lubricating the insides) and working on the delivery to the tool. Use 1/2 ID hose, and if need be, a 3/8 hose as a whip. Make sure your fittings are 3/8 and you have no reducers from the 3/8. On the compressor itself, make sure the regulator is wide open, or better yet, remove it. Even wide open it restricts air out. Most people set the regulator at 90 psi (tool spec) not realizing that the air hose itself reduces that. You want to supply 110 on your tank, or if you are "supercharging" like this video intends, use it wide open.

I have the same one, a great impact for the price, and it has handled almost anything I needed. I've used the common air connections for years, but I'm switching out my old air connections to a larger ID size, to increase air volume first.

I put a t joint on my 5 hp compressor before the regulator so I can have straight from the tank pressure oiled up the gun and it did the job with no problem it would not before. I am going to build a desiccant air dryer to install between that and the hose. The gun is a cheap HF type. Worked like a charm.

sweet awesome video thanks for the detail my stuby nose earth quake impact will be getting this treatment. i would be happy with 100lbs of xtra torque

I have one of these. It pissed me off so much I cashed in a gift card for an Ingersoll Rand 2235. BOOM! Zips off any nut.

Have you considered opening the rotor housing a bit, so the vanes can extend further. More surface area on a pneumatic motor equals more driving power.

awesome ideas

good ťry. I though all those improvements would really pay off but not so. I'm about to rebuild a CP734H. Thanks for the great video.

What was ghe price diffrence between guns

Yeah I have one of those in a box somewhere it sucks I used to end up loosing them off first which kinda defeats the point lol. I am thinking of spending the money on a decent one now though as I have a decent compressor set up these days.

Thanks for sharing. You can do these same upgrades to older, but better impacts like the old Mac/I.Rand b/c of some similar designs like the exhaust holes/ports. I prefer corded electric impact, I went w/ a gently used Kobalt thanks to the RealToolReviews youtube channel, he's good & has amazing equipment that looks like its at his home. Thanks again, - take care from TN.

‏‪3:20‬‏ 😊😊

I have the same impact as that. I used a brake hone and honed the motor larger and eliminated the imperfections it came with to minimize air loss. But I don't think you have enough material left to do that. I also made vanes out of plastic. With only those modifications it has a lot more power. Oh yeah 3/8 hose 1/4 Milton L fittings 125 psi and 34 cfm air pressure and volume. I find that honing made the most difference

I can hear the air just escaping through it, not spinning the motor. Losses a lot of air in the motor.

You can get a lot more out of impact guns if you upgrade you air supply to a larger inside diameter,,,pressure 125 psi,,,general rule of thumb,, 3/8" impact is for 3/8" and small bolts,,,1/2" impact is for 1/2 to 3/8 and so on,,,nice vid you spent a lot of time on it

one thing you didn't modify was the hammering mechanism, that's why you didn't get much tq out your mods' what you archive was more speed. remember if you let it fall one hammer that weight 2oz from one feet to your foot nothing happens, but if was 5 pounds hammer, definitely it will hurt and make some damage. same principle apply to impact wrenchs. also that happen with sockets too. use heavy socket with the smaller gun, it will probably take off the lug nuts without hesitation.

Have you tried taking the weight of the vehicle off the wheel? And tried torquing the lug nuts onto the wheel so they are not tight to the point where they are warping the rotar and bending the threads? Because you might have seized them on by tightening them onto the rotar by using just the impact gun.

Your Problem is the Hose! You need an Hose with a min inner diameter of 9mm or more.You can hear the powerfull Start and then the Pressuredrop. Its a Turbine that needs Flow.So go directly to the Tank without any Pressure regulator inbetween .You should have 10Bar or 140PSi on the Compressor. When you Fire the Impact by using an 10m Hose with 9mm inner you habe around 2Bar or 28PSI Pressuredrop on the Toolfitting.

I'd be very interested in knowing what the increase in torque was with the modifications you made.

try rebuilding the hammer, If you get it banging harder it might make a difference. i wonder did you soak the vanes in air oil?

red impact is without mods? do you have # model?

Yo tengo la primera pistola de impacto y relamente, no perdería tiempo en modificarla, simplemente es mala. La segunda pistola la diferencia es que da dos golpes por vuelta, por eso es más poderosa.

Need to upgrade your air line and fittings sizes, use 1/2” inside diameter hose and 3/8 style fittings (hard to find to find ) fittings. Stay away from 1/4” air fittings

I think it's because of the clutch mechanism, rocking dog is expected to have very low torque output. If you change the mechanism to twin hammer, I believe the torque output will be comparable to your #2 impact

How much gallon your air tank carry

The hammer and the hammer clutch are weak. Cheap air impact wrench with cheap parts nothing you can do. Just for fun!

ye i have made the same error

That’s pretty sad because a Milwaukee impact driver will take em off with no issues. Nice job on the mods though

You polished that turd till it shined. lol. Great video. Would have been neat to measure the torque you gained from start to finish.

I threw mine in the trash yesterday, ordering an aircat stubby, 500 ft lb. $100.

But you don't really know what the torque setting is of either modes on the red gun. What's the torque MEANT to be for the car? 90ftlbs? You might be hitting it 150 or more. Nice vid though, I've got a similar gun that's equally crap so it might be worth performing some surgery on it.

Set working psi on gun because I'm is70psi

the veins look a bit loose

Very slow rpm

the hammers are junk and the veins do not fit in the slits tight so they loose huge power, in your video you can see the nasty lines in the veins. next you get to learn brakes from over tightening your lug nuts , distorting rotors and drums

WHAT is the point of manufacturers making these if they don't do what they are meant to do !!!!!

I believe your your air compressor is the problem

I CAN'T HEAR YOU !

Well once a piece of shit always a piece of shit.. good sounding piece of shit though.. betting the hammers inside are just too wimpy to chooch with aircats and whatnot..

Only 1 hammer, no good.

Should have just spent the money and got a better gun.

Wrong Type Of Gun For The Job... These Impact Mechanisms Are Low Torque Output

are you a horse whisperer by trade? had to give up ..cant hear what you are saying. Should have uprated your microphone first mate.