Tech Tip: Variables that can cause inaccurate torque delivery

• Type of impact used (air, electric, cordless)
• Power (air pressure, air volume, length of hose, size of fittings, battery power, battery age)
• Impacts per second
• Size of internal hammers
• Possible use of additional adapters
• Socket size, weight, length
• Operator grip strength
• Weight of the impact
• Applied angle during use

Attempting to fully tighten hardware with the typical impact guns or torque sticks also prevents using a click-type torque wrench to confirm the specified amount of torque is present. While a click-type torque wrench can identify when the selected torque has been reached, it cannot diagnose excessive torque.

Under-tightening or over-tightening wheel-attaching hardware can also be damaging and dangerous.

Information provided by: ACDelco Auto & Equipment Tools