In article <i9ZUj.126590$Cj7.48995@[EMAIL PROTECTED]
>, Calab <myspam@[EMAIL PROTECTED]
>
wrote:
> I have an eight gallon air compressor... 4.3cfm @[EMAIL PROTECTED]
40psi and 3.5cfm @[EMAIL PROTECTED]
> 90psi.
No where near big enough to run an air powered impact gun.
> I've been looking at buying an inexpensive impact wrenche and notice
> the different ratings on them, but many times they aren't rated the
> same so comparison can be different.
>
> For example...
>
> For $29 I can get a no-name electric 1/2" impact wrench that plugs into
> my cigarette lighter. It provides 250 ft/lb of torque. That's all I
> have for specifications.
>
> For $35 I can get a JobMate air powered impact wrench with the same 250
> ft/lb of torque.
>
> For $150 I can get a 120v impact wrench, but it only provides 228 ft/lb
> of torque. Less than the cigarette lighter model? It runs up to 2100
> rpm.
>
> For $270 I can get a battery powered electric impact wrench that
> provides 1050 ft/lb of torque! That's a lot more than the other
> wrenches, but from a 14v battery? It's not a big unit either. It
> specifies 0-2300 rmp.
>
> What I'm hoping to use this for, besides lug nuts, is for the few odd
> bolts on my car that I can't get loose and don't have room to get a
> breaker bar for extra torque.
>
> What should I really be looking at when checking out the impact
> wrenches?
Buy from a trusted name brand, the cordless impacts marketed towards the
professional are quite powerful, some of the 3/8" versions have enough
snot to remove lug nuts, though that is a bit beyond the anvil size for
expected longevity.
The disadvantage to any electric impact gun is they get hot if used
continuously, hot = burned out faster than you can believe (DAMHIKT) so
buy according to your expected use.
Cordless; Snap-On, Makita, Milwaukee, Dewalt
Air powered; Ingersol Rand
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