Why Does This

Why Does This Wrench Move in Such A Strange Way? It Gets Stuck For A Moment Then Suddenly Jumps Forward. The Motor Is Clearly Spinning. In Front Is Hammering Again And Again. This Is Not A Failure. This Is Exactly What Makes An Impact Wrench Powerful. Back Then The Idea Behind An Electric Wrench Was Simple. Manual Wrenches Were Tiring. So Let A Motor Do The Turning. But Soon Engineers Found A Strange Problem. When A Normal Electric Wrench Met A Rusty Bolt The Motor Would Just Keep Forcing It. If The Nut Did Not Move All That Force Kept Building Up. In Lighter Cases The Reaction Force Went Straight Back Into Your Hand. In Worse Cases The Nut Was Still Stuck. But The Bolt Snapped Inside. That Is When Engineers Realized The Problem Was Not A Lack Of Power. It Was The Wrong Way Of Using Power. For A Rusted Nut Constant Force Can Make Things Worse. What You Really Need Is To Store The Force Then Hit It Out One Impact At A Time. The Impact Wrench Appeared Inside. The Hammer First Spins With The Motor And Builds Up Energy. When Resistance Gets High It Suddenly Strikes And Sends Instant Torque Into The Nut. Each Impact Creates Tiny Vibrations In The Threads Shaking Rust And Dirt Loose Little By Little. So It Does Not Look Like Smooth Rotation. It Looks Like Stopping Catching And Suddenly Jumping Forward. Because Some Nuts By Constant Turning They Are Knocked Loose One Hit At A Time. The Impact Wrench Appeared Inside. The Hammer First Spins With The Motor And Builds Up Energy. When Resistance Gets High It Suddenly Strikes And Sends Instant Torque Into The Nut. Each Impact Creates Tiny Vibrations In The Threads Shaking Rust And Dirt Loose Little By Little. So It Does Not Look Like Smooth Rotation. It Looks Like Stopping Catching And Suddenly Jumping Forward. Because Some Nuts By Constant Turning They Are Knocked Loose One Hit At A Time.