Torque Sticks: Why only pneumatic?

[rd400guy]

I understand what a torque stick is: limits the amount of torque applied to a fastener (an "impact-torque wrench").

I understand how they work:

http://www.procutinternational.com/html/torqstik/how_torqstiks.html

(good explanation)

Why can torque sticks only be used on pneumatic tools and not with an electric impact wrench? I'm guessing it has something to do with the impacts per minute rating of electrics being higher (more than double).

Thanks in advance.

 

[MikeHalloran]

I hate graphs without numbers; they remind me of economics class.

Impact wrenches are dynamic devices. Torque sticks change the dynamics. They work with different brands of wrenches only because the hammer mechanisms are similar to each other within a given drive size.

Electric impact wrenches have different dynamics; faster impact cycle, and motor torque not limited by supply air pressure.



Mike Halloran
Pembroke Pines, FL, USA

 

[DAVIDSTECKER]

One thing that is missing from there graph and is a very important bit of information is the spike that occurs when the nut comes to a stop after spinning at 10,000 RPM.
The damage is already done at that point.
Personally I do own imapct wrenches but if I use them I throw the bolt and nut away.
I also know from personal experiance that there are no impact wrenches on the assembly line of a car plant. All nut runners.