Nail Gun Not Sinking Nails? Fixes (2027)

Raise the depth setting a step at a time and test on a scrap piece of the same material before returning to visible work. Depth wheels and dials are tool-free on most nailers here, so adjusting takes seconds, and a setting that worked on soft pine will leave heads proud on hardwood casing. If the nail sinks too deep after one step, back off half a step and retest; depth control rewards small moves.

On a cordless nailer, a fading battery loses drive power before it stops firing, so swap in a fresh pack and retest. On a pneumatic nailer, check compressor pressure against the tool's rated range: the Metabo framer here wants 70 to 120 PSI, and pressure below that range leaves heads proud in dense lumber. Raise pressure within the rated range, never above it, and retest on scrap.

A long nail in dense material asks the tool for more drive energy than it can deliver cleanly, especially at the top of its length range. Shorten the nail by one size where the job allows it, or pre-drill dense hardwood trim for the longest fasteners. If only the longest nails fail to sink while shorter nails drive fine, length is the cause, not the tool.

Check that the nail strip matches the tool's angle and collation type, that the strip is straight and undamaged, and that the magazine follower moves freely. A bent strip, a wrong-angle strip forced into the magazine, or a follower stuck on debris all cause weak or partial drives. Clear the magazine, reload a fresh straight strip of the correct stock, and retest.

Clear any jammed nail or collation fragment from the nose, following the tool's jam-release routine with power or air disconnected. Inspect the driver blade for wear or damage if weak drives persist after depth, power and nail checks all pass. A worn driver blade is a service item, not a setting to adjust around, and continuing to force it risks damaging the tool and the work.