Product Description
Milwaukee 5/16 in. x 12 in. MX4 SDS+ Carbide Drill Bit
Model Number: 48-20-7344
The Milwaukee 48-20-7344 is a 5/16 in. diameter x 10 in. flute length x 12 in. overall length MX4 SDS+ Carbide Drill Bit — the deep-reach configuration of Milwaukee's premium four-cutter MX4 bit at the 5/16 in. anchor drilling diameter for through-wall penetrations and longer concrete screw embedments requiring more working depth than the standard 6 in. configuration. The MX4 four-cutter tip doubles the carbide cutting contacts per revolution versus standard two-cutter SDS+ bits, delivering faster penetration rate and extended bit life from doubled carbide wear distribution. At the 5/16 in. diameter, the 12 in. overall length and 10 in. flute length enable through-wall drilling in standard CMU block construction, longer concrete screw anchor pilot holes where pull-out load specifications require greater embedment depth, and drilling positions where the hammer must be held away from the wall surface due to adjacent structural elements that prevent close placement of the hammer.
Milwaukee's optimized flute pitch and geometry for the MX4 at this diameter-length combination maintains adequate concrete debris transport capacity over the extended 10 in. working depth, preventing hole choking that would require frequent drill withdrawal and interrupt production drilling pace during commercial anchor installation work. The 5/16 in. diameter is used for specific concrete screw anchor and expansion anchor systems where the slightly larger bore than the 3/16 in. standard provides better anchor engagement for higher load ratings while remaining in the light-duty anchor category. The SDS+ shank provides tool-free engagement in all SDS+ rotary hammers for fast bit changes, and the MX4 premium specification is available in individual, 5-pack, and larger bulk quantities for different volume purchasing needs.
See Milwaukee's complete MX4 SDS+ lineup for all available diameters and lengths in the premium four-cutter bit specification.
Features
- MX4 four-cutter tip — faster speed and longer life vs. standard 2-cutter SDS+ bits
- 5/16 in. diameter for concrete screw anchors requiring slightly larger pilot than 3/16 in.
- 12 in. overall length for CMU through-walls and longer anchor embedment depths
- 10 in. flute optimized for debris evacuation through full working depth
- SDS+ shank for tool-free engagement on all SDS+ rotary hammers
Specifications
- Diameter: 5/16 in.
- Flute Length: 10 in.
- Overall Length: 12 in.
- Tip: MX4 4-Cutter Carbide
- Shank: SDS+
Includes
- (1) Milwaukee 48-20-7344 5/16 in. x 12 in. MX4 SDS+ Carbide Drill Bit
