Product Description
Milwaukee SDS Max 4CT 3/4 in. x 12 in. x 17 in. Rotary Hammer Bit
Model Number: 48-20-3931
The Milwaukee 48-20-3931 is an SDS Max 4-Cutter (4CT) Rotary Hammer Bit in 3/4 in. diameter with a 12 in. working length and 17 in. overall length — a large-diameter premium extended-length SDS Max bit combining four-cutter tip technology, SDS Max platform energy delivery, and extended working depth for demanding structural anchor drilling and through-wall penetrations in hard commercial concrete. The 3/4 in. diameter is a major structural anchor size used for the highest load-rated wedge anchor, sleeve anchor, and adhesive anchor systems in critical structural connections — base plate anchors for structural steel columns, heavy equipment foundations, overhead structural hanging connections, and seismic bracing installations where 3/4 in. anchors are specified for their load capacity at code-required embedment depths. Milwaukee's 4CT four-cutter tip delivers four carbide cutting contacts per revolution versus the standard two-cutter geometry, doubling the cutting contact frequency for faster penetration rate and distributing carbide wear across twice the surface area for extended bit life in the hard high-strength concrete where large structural anchors are most commonly installed.
The SDS Max shank transmits the highest available rotary hammer impact energy to the 4CT four-cutter carbide tip — the combination of SDS Max energy delivery and 4CT cutting efficiency produces the fastest available drilling speed in hard commercial concrete for the 3/4 in. diameter at 17 in. overall length. The 17 in. length extends the working reach for structural installations in thick concrete sections, through-penetrations in masonry walls with additional finish layers, and drilling positions where the SDS Max hammer must be positioned away from the drilling face due to structural interference. Milwaukee's optimized flute geometry maintains efficient concrete debris evacuation through the full 12 in. working depth for uninterrupted production drilling at this demanding diameter-depth combination.
See Milwaukee's complete SDS Max 4CT lineup for all available diameters and lengths in the premium four-cutter format for heavy structural concrete drilling applications.
Features
- SDS Max 4CT four-cutter tip for maximum speed and life in hard structural concrete
- 3/4 in. diameter for highest load-rated structural anchors in critical connections
- Four cutting edges double contacts per revolution vs. standard 2-cutter SDS Max bits
- 17 in. overall length for deep embedment and thick-wall structural penetrations
- Optimized fluting for continuous debris ejection through full 12 in. working depth
Specifications
- Diameter: 3/4 in.
- Working Length: 12 in.
- Overall Length: 17 in.
- Shank: SDS Max
- Tip: 4CT Four-Cutter Carbide
Includes
- (1) Milwaukee 48-20-3931 SDS Max 4CT 3/4 in. x 12 in. x 17 in. Rotary Hammer Bit
