What I would like to see is the second picture.
The one that shows the big fella who operates that big impact driver versus
a normal size guy.
I'd like to see a 1/2" hex impact socket for the Big one !
Martin H. Eastburn
@ home at Lions' Lair with our computer lionslair at consolidated dot net
TSRA, Endowed; NRA LOH & Patron Member, Golden Eagle, Patriot's Medal.
NRA Second Amendment Task Force Charter Founder
IHMSA and NRA Metallic Silhouette maker & member.
Lee Michaels wrote:
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Actually the big impacts are easy to handle if you can pick them up. I have
used 1" impact drives on 18 wheeler truck wheels and they are no harder to
use than a 1/2". Because they are impact drives they will not transfer the
torque to your hands and or arms like a direct drive drill.
A 1/2" Skill drill will deliver much more feed back to the operator than a
1/2" impact that is operating corectly. The whole idea of the impact driver
is to deliver impact pulses that loosen or tighten rather than a continuious
feed of power. In the tire business I often used a 1" impact with little
effort other than simply holding the tool. Beccause of the weight of the
tool a 1/2" impact wrench gave the operator more feed back than the 1"
Do you have personal experience with larger impacts? The whole idea to the
pneumatic impact is to enable a person to handle larger applications with
out great effort. The only thing that I see different would be that the
larger 2.5" impact would simply be harder to pick up and position. Its
greater size would probably require 2 people to handle it but beyond that
pulling the trigger should not exert much more effort on the operator.
I have very little experience. I handled two large impacts (both for
selling on ebay as I have no need for them).
One was a 1.5" splined I-R impact (sold to a rec.crafts.metalworking
member). Another was that 2.5" impact.
I did not have enough air to spin up that 2.5 impact to full speed.
But I did have enough air to spin up the 1.5" impact. I held it as
tightly as I could, and still it almost jumped out of my hands.
Due to extreme spam originating from Google Groups, and their inattention
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An impact that "does not work properly will be tough to hold on to". I
have a 3/8" air ratchet that is holder to hold on to than the 1" that I used
to use. Needless to say the 3/8" ratchet does not work properly. ;~(
Hmmmm.... Learn something new every day. The only ones I have ever
seen were basically just a turbine & gear reduction.
"We need to make a sacrifice to the gods, find me a young virgin... oh, and
bring something to kill"
A recent design combines an impact wrench and an air ratchet, often called a
"reactionless air ratchet"  by the manufacturers, incorporating an impact
assembly before the ratchet assembly. Such a design allows very high output
torques with minimal effort on the operator, and prevents the common injury
of slamming one's knuckles into some part of the equipment when the fastener
tightens down and the torque suddenly increases. Specialty designs are
available for certain applications, such as removing crankshaft pullies
without removing the radiator in a vehicle.
I was not trying to prove you wrong, but the picture of the 2 impacts show
an pneumatic 1/2" impact and I would assume also that the larger one is
pneumatic also. You mentioned Hydraulic Impacts, those I have no experience
with at all. You also mentioned a comparison to your 1/2" Skil drill.
There is no comparison what so ever between a direct drive drill and an
impact driver. For years when in the automotive business I use 1/2" impacts
and they only require the effort to hold the tool. Perhaps 1~2 % of the
force feeds back to the operator as opposed to a 1/2" drill where 100% is
delivered back to the operator. On numerous occasions I used a 1" impact to
remove lug nut from "Large" equipment, obviously not as large as the 2.5"
tools is capable of handling but in my 35+ years of experience with properly
working impact drives the bigger the capacity 1/4", 3/8", 1/2", and 1" there
was no difference in feed back to the operator once in place one hand to
pull the trigger was all that is needed to prevent the tool from spinning.
Weight was the only difference in my experience. "A properly working impact
Should Not deliver much if any feed back to the operator. An inferior or an
"in need of servicing" unit may not provide the operator with proper buffer
from the toque. Impacts deliver thousands of on/off impulses that
accomplish loosening or tightening nuts and bolts. If the tool has an
internal air leak it can bypass the hammering/impact mode and simply try to
spin continuously, that is when the impact would require more effort from
And perhaps spinning it up *without* a load would quickly
accelerate the square drive and some internal parts to full speed without
using the impact, thus transferring more to the user's hands -- which
could explain Iggy's experience. He did not say that he had it on an
appropriate nut load -- but that it did try to twist out of his hands.
(The 1" or 1-1/2" one, not the 2-1/2" one IIRC.)
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