Overview
This replacement piston driver is manufactured to OEM specifications for pneumatic and battery-powered nailers. A worn piston driver is one of the most common causes of inconsistent nail depth and tool jams. Swapping in a new driver assembly is a cost-effective repair that extends the working life of your nailer significantly.
Key specifications
- Aftermarket piston driver assembly
- Direct OEM-equivalent replacement
- Includes o-ring(s) for proper cylinder seal
- Precision-machined for consistent nail depth
Compatibility
This piston driver is designed to fit DeWalt nailers as specified in the compatibility listing above. Always cross-reference the full model and type number stamped on your tool’s nameplate before ordering.
Installation notes
Always depressurize the nailer and disconnect power before servicing internal components. Access the piston driver by removing the cylinder end cap and nose assembly. Apply a light coat of pneumatic oil to the replacement driver’s o-ring before reassembly to ensure a good seal from the first shot.
Common questions
Q: Will this N446582 piston driver blade fit my DeWalt DCN660B and the Bostitch BCN662D1, or is it only for one brand?
Yes, this piston driver blade is used on the DeWalt DCN660B, DCN660D1, DCN662B, and DCN662D1 finish nailers, and it is also listed as compatible with the Bostitch BCN662D1. It replaces part numbers N563610, N517610, and SP N563610, so matching your original part number is a good way to confirm fitment before installation.
Q: My DCN662B is dry-firing and not pushing the finish nails consistently—could a worn N446582 driver blade cause that?
Yes, a bent, chipped, or shortened driver blade can cause inconsistent nail driving, jamming, or dry-fire symptoms because it no longer pushes the nail cleanly through the nose. If the tool is cycling normally but nails are not setting correctly, inspecting the piston driver blade for wear or damage is one of the first things I would recommend.
Q: Is there anything special I should do when installing this piston driver blade in a DeWalt DCN660D1?
Before installing it, remove the battery, clear all nails from the magazine, and open the tool far enough to inspect the piston, cylinder, and nose for debris or damage. During reassembly, make sure the driver moves freely in line with the nose channel, because any binding or misalignment can lead to repeat jams or premature wear on the new blade.
