Document P/N:
2P42520
Release Date:
07/11/2016
Revision: D
12 of 22
Installation Equipment, Accessories & Specifications continued
This device appears like a simple hex drive extension but is actually an engineered product that limits the
torque that an impact wrench can impart to a bolt. This functionality is achieved by a specific combination of
physical geometry and material properties of the steel. When the torque applied to the bolt reaches the rated
value of the extension, the shaft will flex. Before the next impulse from the impact gun can be applied, the shaft
will "spring" back. Any further attempts to tighten the bolt will only result in the shaft flexing in sync with the
blows from the impact wrench.
The extension is easily attached to the impact wrench using a 3/4” square male/female drive with a socket
retainer. The additional reach offered by the extension also helps to reduce worker fatigue.
The Torque Regulator Bar is capable of limiting torque to /- 25 psi of the rated value and is a function of
available air pressure. Due to this, SPM
®
requires that the extension be verified and calibrated before each job
(see Calibration Procedure).
TORQUE REGULATING BAR FOR ASSEMBLY ONLY.
DO NOT USE FOR DIS-ASSEMBLY
