The pop-rivet mandrel jam (short-stroke slip)

Shallow pumping causes the tool's internal hardened steel teeth to grip the rivet mandrel at unequal points, slipping and jamming the pulling core. Open the tool handles completely wide to reset the internal jaw teeth, slide the rivet stem completely home.

Tools, Fasteners & Hardware 1st Year GREEN

Stop if

The rivet gun is jammed because you short-stroked the handles. Open the arms wide to clear the broken stem, slide the next rivet all the way home, and give it a single full-stroke squeeze.

Watch out

Do not force the tool through the problem or substitute the wrong tool just to keep moving.

Check

Confirm the tool matches the task, material, and gauge.
Inspect the setup before forcing the cut, weld, fold, or fastener.
Use steady controlled pressure instead of speed or brute force.
Stop if the tool overheats, jams, slips, or damages the part.
Correct the setup before the mistake turns into rework overhead.

Steps

Confirm the tool matches the task, material, and gauge.
Inspect the setup before forcing the cut, weld, fold, or fastener.
Use steady controlled pressure instead of speed or brute force.
Stop if the tool overheats, jams, slips, or damages the part.
Correct the setup before the mistake turns into rework overhead.