Looking for a 50ft lb cordless impact ??

[johninct]

I am going to be taking a metal building down. I am looking for a small, very light cordless impact wrench that can remove bolts torqued to say around 40 ft lb. My Snap-On CT 561 ( which can loosen bolts torqued to about 22 ft lb per my test) is the perfect size and weight but can't remove all of the bolts. I know the Snap-On CT 4410 can take the bolts off like nothing but it is kind of big to get into where the bolts are located and a little heavy. The biggest socket I will be using is 9/16". Any recomendations.

 

[shampoop]

Sounds like you're looking for something like this. http://www.makita.com/en-us/Modules/Tools/ToolDetails.aspx?ID=349747

83 ft/lbs

milwaukee and other brands also make very similar models.

 

[TheGrooveking]

The Milwaukee M12 series 2451 3/8" impact can do that job.

TheGrooveking

 

[Jimmyg]

I like my little dewalt 12v 3/8 impact

 

[Danglerb]

Keep in mind most manufacturer ratings are FOS.

 

[diesel research]

The Milwaukee M12 series 2451 3/8" impact can do that job.

TheGrooveking

I'm not so sure those ratings are true and real. Why do I say that? I use an M12 everyday.

Think for best results you are not going to be using any of the small "12v" (10.8) cordless.

The ratings are based on them stalled, hammering for x number of seconds. In real life thats a way to quickly run down batteries and get you no where.

 

[TheGrooveking]

I'm not so sure those ratings are true and real. Why do I say that? I use an M12 everyday.

Think for best results you are not going to be using any of the small "12v" (10.8) cordless.

The ratings are based on them stalled, hammering for x number of seconds. In real life thats a way to quickly run down batteries and get you no where.

In another thread I was told the 12V Bosch Impactor was more powerful, compared to the 1,000 in.lb Milwaukee 2451, so I bought the Bosch to compare. I set up a 1/2" bolt(3/4" head) x 5" long thru a piece of 3/4" pipe with washers in either end. Placed the pipe in a vise long ways, put an oversize square nut on it, so that the nut could not turn in the jaws.

I then tighted the bolt to 40 pounds, 50 pounds, 60 pounds, 70 pounds and 80 pounds using my Matco 1/2" torque wrench. At each step I used the Milwaukee to loosen the bolt, then I would re-torque it and use the Bosch to loosen the bolt, at the 80 pound mark the Milwaukee could loosen the bolt, but the Bosch could not.

I then reverse the test and used the Milwaukee to tighten the bolt and used the torque wrench to loosen, the highest I was able to attain with three tries was 76 ft. lbs. For the Bosch the highest I was able to attain was 69 ft. lbs.

So as to the ratings being FOS, maybe the unit's you have tried, but in my tests they both did what they said they would/could do.

TheGrooveking

 

[cashishift]

I have this one:

http://dewalt.com/tools/cordless-impact-driverswrenches-high-torque-wrenches-dw059b.aspx

I friggin love it.

 

[diesel research]

In another thread I was told the 12V Bosch Impactor was more powerful, compared to the 1,000 in.lb Milwaukee 2451, so I bought the Bosch to compare. I set up a 1/2" bolt(3/4" head) x 5" long thru a piece of 3/4" pipe with washers in either end. Placed the pipe in a vise long ways, put an oversize square nut on it, so that the nut could not turn in the jaws.

I then tighted the bolt to 40 pounds, 50 pounds, 60 pounds, 70 pounds and 80 pounds using my Matco 1/2" torque wrench. At each step I used the Milwaukee to loosen the bolt, then I would re-torque it and use the Bosch to loosen the bolt, at the 80 pound mark the Milwaukee could loosen the bolt, but the Bosch could not.

I then reverse the test and used the Milwaukee to tighten the bolt and used the torque wrench to loosen, the highest I was able to attain with three tries was 76 ft. lbs. For the Bosch the highest I was able to attain was 69 ft. lbs.

So as to the ratings being FOS, maybe the unit's you have tried, but in my tests they both did what they said they would/could do.

TheGrooveking

I think it is just because when a bolt is torqued to ___ and left to "age" a while it suddenly takes a bit more "oomph". Use mine all the time, but a few stainless 7/16 locknuts did show it it's limits.

 

[HandyManny]

HILTI has got to have what you need.