Thanks for bringing back another old thread for no reason.

 

I think you just thanked a spammer. First post, link to a page with a product for sale.



Ken

 

LOL... The spammers know how to search better than the noob would-be enthusiasts.

 

Using a normal straight-line extension does not, and cannot, affect the accuracy of the torque wrench. All the torque wrench does is measure the torque that exists between the two leverage points, one being the bolt and the other being your hand; it doesn't matter if you use an extension a thousand miles long, the only effect is that you'd have to twist the wrench more to achieve the torque you want.

 

New user with one post?
Necroposting in a 4-year-old thread?
Promoting a paid-for app?

I smell spam...

 

Regardless, of spammers, the torque wrench measures torque at its head. Drawing a free-body diagram will show that the force at the head will be equal and opposite to the force applied to the fastener (by friction from the threads and faster seat).

For low-speed forces (from a human-powered torque wrench, this is true regardless of the length of the axle.

High-speed or high-frequency (from, say an impact gun) forces may differ due to torsional play and flexing in the axle (i.e. locking lug keys, extensions, etc).