half-inch socket attachment for limiting torque?

No idea but I did see a nice looking Torque wrench on special today for $79 at ATI tools on Port Wakefield road near the Slat pans there.....

Muddy

you can buy them at any repco ect.
they are just a socket that are preset to a certain torque.
to many bourbys to remeber what there called but repco ect will know what your after.
normaly only come in a few sizes that fit most common wheel nuts.
17-19-21 mm

They are called 'torque extensions'.
Different colours signify different tensions, see the link ......
Torque Extensions HERE

I read somewhere that if these are used for undoing the nuts they are no longer calibrated and considered useless.

Pooley

Whatever you buy make sure it is accurate. A couple of years ago I bought an old Warren and Brown tension wrench at a second hand for store for $25. I took it to a Sydney company called Torque Calibrations Pty Ltd and had it overhauled and adjusted for $50. They sell for over $250 new. It was accurate to within 1 foot pound on their digital testing equipment. I now keep it permanently in my car, wrapped in thin rubber mat inside a cardboard tube, and use it every time I change a wheel.

I often woinder about those rattle guns at tyre services. My Hilux owners manual lists the wheel nut tension at 76 foot pounds for the 4X4 but 101 for the 2WD. I am sure most other cars would have different tensions. The tyre shop rattle guns seem to have a one tension fits all setting.

Brian

Hi Roachie
You will find if you put any type of extention onto an impact gun it will decrease the torque out put of the gun. Those extentions you are talking about would be for pneumatic rattle guns capable of at least 500 ft/lb or more but then those guns will have several adjustable setting as well. Not sure about the 12v one as to the torque output but wouldn't think it would be as much as the air ones. As for correct tension I wouldn't think anything hooked up to rattle gun would be acurrate for long (it would flog it to death).
Regards Ross

roachie ,
We have a set of the articles in question they are in effect a 6in extension with a socket ,all one piece and the tension is determined by the shaft diameter , ie,when the torque is reached they just flex minutely ,the thicker the shaft the higher the torque .
mechpete