Yes: the acceleration rate of a torque wrench is almost zero, while that
of an air wrench is substantial, and it's applied the same way a
hammer-drill is, in bursts until the nut starts to turn.
In a previous life as a motorcycle- and occasionally car-mechanic, the
order was
* start with a long wrench,
* add penetrating oil overnight and repeat,
* curse loudly and add heating nuts with a torch and cooling with water.
* Failing that, buy some new nuts and cut the old ones off with the
cutting torch and a cold-chisel.
We never got to air wrenches.
--dave
On 11/3/23 03:07, William Park via talk wrote:
Hi (another very off topic),
Wheel bolts on my VW are seized pretty hard. Standing on 24in breaker
bar doesn't help, and that's 300ft-lb torque. So, I'm thinking about
getting an impact wrench. Those with greater than 300ft-lb are very
expensive. I found one with 250ft-lb spec at my price range.
Question is, is there difference between static torque vs impact
torque? In other words, will 250ft-lb impact wrench loosen 300ft-lb
bolt?
Browsing YouTube, I learned that torque specs are always misleading
and inflated. This means, I have to find 600ft-lb or greater, and
that's serious money.
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