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How Powerful or Torquey of a Cordless Impact Driver Do I Need for Wheel Lug Nuts?

8.9K views 54 replies 22 participants last post by  Micro  
#1 ·
As impressive as the top of the line Milwaukee Cordless Impact Guns are, I wouldn't need such a powerful, heavy and expensive one as that for changing summer to winter rims.

What specifications should I be looking for in a cordless Impact Driver?

Thank you
 
#2 ·
I think impacts rated in the 200-250 ft lbs+ category will be fine for Honda lug nuts.

Although if you’re going to buy a battery impact, it should do more than lug nuts. Consider 2 types - either a lighter, more nimble one in the 3/8” range which would be something you would use to “do most things” faster, or one that is more powerful n the 1/2” range to do things that would have required “more muscle”.
 
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#3 ·
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#6 ·
I have a corded impact that I use for loosening lug nuts but I never use it to tighten them.
A) if I have a flat tire I want to change it
B) I have found that lug nuts (over tightened) with an air impact have widely different torque values (even with a wobble stick).

Cordless impacts are impressive and very handy when there is no place to plug in a tool.
 
#7 ·
Anything over 200ft/lbs is going to do the job of removing the lugs, unless they are corroded on. Most tire shops will torque the lugs to 75ft/lb, so 200 should release them.

NEVER use the impact to tighten the lugs. You can use it to run the lugs on (after finger threading them to start), but NEVER use it to tighten them. A torque wrench is required for that.
 
#9 ·
I have a Ryobi PCL250 (3/8" 220 ft-lbs) for home use. I already had the Ryobi one + battery for it so it was very inexpensive and turned out way better than I expected when I bought it.. It has always been able to remove lug nuts on my E and my work van and actually gets a lot of use by me and neighbors where the big Milwaukee impacts are overkill. I have them at the farm workshop for when I need BIG. Ya, never never never use the impact to tighten, that's what a torque wrench is for. I have an extendable gorilla wrench in the E for flats on the road. It's way better than either the E wrench or a crossbar Lug tool.
 
#12 ·
Thanks for the replies everyone!

I should note that I do already have a torque wrench and always use anti seize on all my harware, keep a can of it in the car at all times

oh and being in an apartment building I cant always get access to a power outlet so I pretty much have to go with a cordless
 
#17 ·
Thanks for the replies everyone!

I should note that I do already have a torque wrench and always use anti seize on all my harware, keep a can of it in the car at all times
Anti-seize on lug nuts is a bad thing.
It DOES change the actual torque value applied. The torque wrench could read 80ft/lb and the actual applied torque could be 100ft/lb.
Using anti-seize will put uneven, higher torque in the connection. This can deform wheels, stretch lug bolts, crack the wheel at the connection, or cause the connection to fail altogether. You don't want to ruin good wheels or be racing your tire down the road. The tire will win.
 
#14 ·
By the way should I get at least one Impact socket in the lug nut size or do you all think a regular socket will be fine for my occasional use. I have the Mastercraft regular socket set from Canadian Tire and they have a lifetime replacement warranty
 
#22 ·
Old school, retired mechanic here.. If you are only servicing your own car(s), a large impact gun is not needed. A 1/2 or 3/4" breaker bar and appropriate impact socket will do it. Also, if not careful, an impact gun can break off a wheel stud- and that's a whole 'nother project. Also, a basic torque wrench for the final tightening is a real good idea.
 
#23 ·
This is why I said to rent or borrow a strong cordless one, if it's just this one job. For me, I'm getting one because I service all my own vehicles and have a few projects, plus help out others with their vehicles too. Doing everything with hand tools is fine when that's all you have, but this is a huge time saver. Plus, I don't have a shop, everything is done on a gravel driveway.
 
#24 ·
I had a lot of DeWalt cordless tools so I picked up a DeWalt XR 20v. It’s been excellent.
 
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#25 ·
This is the DeWalt Impact Driver I currently have. It came as part of a set with a drill I bought. I have not tried to use it yet to remove wheel lug nuts

The DCF787 seems to have a few versions on DeWalts website but they all say 1500 ft lbs of torque but it doesnt say what of if there is any difference in break away torque?

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#30 ·
I have both a Dewalt smaller 20V impact driver with 3/8" adapter and this:
DEWALT 20V MAX XR Impact Wrench Kit, Brushless, High Torque, Detent Anvil, 1/2-Inch (DCF899P1)

The smaller one is great for misc. jobs on and off the car. It's great for tightening lug nuts before finishing them by hand. The larger one is a beast. In addition to lug nuts, I have removed strut and control arm bolts (even the rusty rear bolts), axle nuts, and other difficult fasteners. Get a 5AH or better battery. I stayed within the Dewalt line, and have both impacts, screw gun, sawzall, and a cool LED work light. Can charge and interchange batteries at will.
 
#33 ·
I have this Ryobi, and it has been great for lug nuts and even took off the axle nuts. I want to second or third the no anti-sieze on the lug nuts. The same amount of torque will put higher axial loads on your wheel studs and they will be more likely to fail.

 
#35 ·
I STILL recommend NO lube at all. Torque is specified as dry. You risk more damage with lubed connections.

Your choice.
 
#36 ·
Where anti seize really helps -and is ok- is as a thin coat on the back of the rims where the aluminium rims sit on the steel rotor. When I've purchased several vehicles with alloy rims they were really bonded to the rotors there. Just a very thin coat on that surface keeps that from happening. NO lube at all on the studs