Looking for cordless impact wrench and comparing the in. lbs. of torque. So far, the DeWalt DW055K-2 for $219 with free shipping is looking like the winner. Coming in at 1,550 in. lbs. of torque. I think this should be efficient...what do you think?
How many in. lbs. of torque for changing blades???
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walker-talker
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Looking for cordless impact wrench and comparing the in. lbs. of torque. So far, the DeWalt DW055K-2 for $219 with free shipping is looking like the winner. Coming in at 1,550 in. lbs. of torque. I think this should be efficient...what do you think?
I think that if you use 1/2 that amount of torque you will never get the blades off. I try not to really bare down with my $49.00 electric impact wrench. Even my dealer when installing blades just barely tightens them after the get to the knocking sound and thats a plenty. That Dewalt you are looking at will surely get the job done!
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To get foot pounds just divide the inch pounds by 12. So you start with 1,550 inch pounds and end up with 129 foot pounds. That should be sufficient.
Don't over-torque the blade bolts. If the manual says 75-80 lbs/ft... that is all the torque that is needed. If you over-torque the bolts, they will stretch which will weaken them and possibly causing them to break. An impact wrench is not necessary for blade bolts. A simple click torque wrench is much more accurate and easier to use.
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We don't torque our bolts either. We use an impact wrench to take them off and an impact to put them on and we've never had a problem either.
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Normally I just use the Campbell Hausfield impact wrench that came with the air compressor and it has always worked fine. Doubt if it matters, but they are doubles, but they have a special bracket for this....it's just not two blades laying on top of each other. I might just get buy using a "T" tire iron. I will only have to do this in the field a few times when I am out scalping. Thanks for the post.
Matt
Matt
Fasteners have a torque rating on them for a reason. Different grade nuts and bolts have specific maximum torque ratings recommended by the manufacturer of the nut or bolt. The reason is an anomaly called metal fatigue. Metal fatigue occurs when a fastener has been over-stressed or over-torqued. Metal fatigue is the reason that nuts and bolts strip or break when they are over tightened. If you exceed those maximum torque values, you are flirting with disaster. There is no reason to install a fastener with an impact tool and not know how much torque is being applied, when a very simple tool called a torque wrench will do the job properly.
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I have a Milwaukee 18V cordless (240 lb. /ft) and sometimes it can't get the bolts off of my Gravely 260Z.
If you hit something with the blade and it gets tighter, you're not going to get the bolt off with that impact wrench.
Plus, that thing is barely enough to handle car lugs, etc.
Get the Milwuakee, its $300 and worth it.
KB
If you hit something with the blade and it gets tighter, you're not going to get the bolt off with that impact wrench.
Plus, that thing is barely enough to handle car lugs, etc.
Get the Milwuakee, its $300 and worth it.
KB
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tork wrench smork wrench. Never have used one to put blades on and have had zero problems.
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I always use a torque wrench on fasteners that have a specified torque. I carry a 1/2 inch clicker in the truck for the sole purpose of properly tightening blade bolts. I have been a professional mechanic for 35 years, and have learned that the engineers arn't as dumb as you think. Bolts stretch when you tighten them. If you overtighten them you can stretch them beyond their design limits, and they weaken and can break. It can also pull the threads and make it harder to change the next time. Air tools have their place but a little common sense can save you a lot of grief.
Now thats funny and true, however I am sure you as a seasoned mechanic can remember some well engineered blunders........Hey what did most smart Mopar men back in the day (35 years ago or so) carry in the glove box????green acres lawns said:
Anyway 12 years of zip on and zip off no problems.......
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Hmm... My calculator says 129.17 no matter how many times I do it.petrentz said:
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