13/16" S&D Black Oxide Drill Bit

The Milwaukee 48-89-2748 is a 13/16" Silver & Deming (S&D) black oxide drill bit used for large-diameter, heavy-duty drilling in metal, wood, and plastic.

This is one of Milwaukee’s largest standard reduced-shank drill bits, meaning it has a full 13/16" cutting diameter but a 1/2" shank so it can still be used in a standard drill chuck.

Key Features

• 135° split point tip – starts quickly and reduces walking for accurate holes
• Black oxide coating – reduces friction and improves corrosion resistance
• Parabolic flute design – clears chips efficiently for faster drilling
• 1/2" reduced shank (3-flat Secure-Grip) – prevents slipping in the chuck
• Heavy-duty web construction – adds strength for large hole drilling

Specs

• Size: 13/16 in
• Shank: 1/2" reduced (S&D style)
• Material: High-speed steel (HSS)
• Finish: Black oxide
• Overall length: ~6 in
• Use: Metal, wood, PVC, plastics

Best Uses

• Large structural bolt holes
• Steel fabrication and construction work
• Thick timber and beam drilling
• HVAC, plumbing, and mechanical installs
• Any job needing maximum hole size in a standard drill

Bottom Line

The 48-89-2748 is a heavy-duty S&D drill bit for big structural holes, not a precision small-bit tool. It’s designed to let a normal drill handle very large diameters safely and efficiently.