How do I adjust the nail drive depth on the SB-1664FN?
The SB-1664FN features a Depth Adjustment Knob to control fastener drive depth from flush to shallow or deep countersink. First set the air pressure for consistent drive in your specific material, drive a few test fasteners to evaluate, and if adjustment is needed, disconnect the air supply before turning the depth adjustment knob.
From the official Bostitch SB 1664fn manual, page 13
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