Original DeWalt N078437 — metal sleeve for DeWalt impact drivers and drill/drivers. The sleeve sits inside the nose cone between the compression spring and washer and helps retain the anvil/bit‑holding assembly and spring, so replacing a worn sleeve restores positive bit retention and proper anvil alignment.  If your bits are falling out, we highly recommend checking your Sleeve Spring (N019351) and Steel Ball (N089668) at the same time, as these internal parts often wear down together

This is the genuine DeWalt N078437 part, sold individually and ready to drop into the nose assembly; typical repair time is short (many users report 15–30 minutes to access and swap the sleeve after removing the snap ring, washer and spring).

Example models this sleeve is listed to fit include:

• DeWalt DCF885 Series (Fits Type 1, Type 2, Type 10, Type 11 variants, including DCF885C2, DCF885L2, DCF885M2)
• DeWalt DCF886 Series (Fits Type 1, Type 2, Type 10, Type 11 variants, including DCF886N)
• DeWalt DCF835 Series (Fits Type 1, Type 10 variants, including DCF835C2, DCF835L2)
• DeWalt DCF815 Series (Fits Type 3 variants)
• DeWalt DCF836 Series (Fits Type 1, Type 2, Type 10, Type 11 variants)
• DeWalt DC825 & DC845 Legacy Impact Drivers
  
  
  
  

Part number: N078437 (sleeve).