Product Description
Milwaukee 9/16 in. x 18 in. MX4 SDS+ Carbide Drill Bit
Model Number: 48-20-7387
The Milwaukee 48-20-7387 is a 9/16 in. diameter x 16 in. flute length x 18 in. overall length MX4 SDS+ Carbide Drill Bit — the extended ultra-deep-reach configuration of the premium four-cutter MX4 bit at the 9/16 in. diameter for the most demanding structural anchor installations and through-wall penetrations where working depth requirements exceed all shorter configurations. The MX4 four-cutter tip provides four active carbide cutting contacts per revolution versus the standard two-cutter geometry, delivering faster penetration and extended bit life from doubled carbide wear distribution — performance advantages most significant in the hard high-strength concrete where 9/16 in. structural anchors are most commonly specified. The 18 in. overall length with 16 in. flute enables through-wall drilling in thick CMU construction with additional finish material, extra-deep structural anchor embedments specified for the highest pull-out load ratings, and drilling from positions where the SDS+ hammer must be placed far from the drilling face due to surrounding structural interference.
At 9/16 in. diameter and 16 in. flute length, Milwaukee's flute engineering for the MX4 at this extreme diameter-depth combination is the critical design element for sustained production performance — the 9/16 in. bore provides reasonable flute volume for concrete debris transport, and Milwaukee optimizes the flute pitch specifically for the 18 in. overall length to maintain effective hole evacuation through the full working depth without the choking that would require frequent drill withdrawal during production drilling operations. The SDS+ shank provides tool-free engagement in all SDS+ rotary hammers for fast bit changes during production anchor installation. This extended-length configuration is a specialty bit for applications specifically requiring the 9/16 in. diameter at the deepest available standard SDS+ length.
See Milwaukee's complete MX4 SDS+ lineup for all available diameters and lengths in the premium four-cutter specification.
Features
- MX4 four-cutter tip for faster speed and longer life vs. standard 2-cutter SDS+ bits
- 18 in. overall length for deepest structural anchor embedments and thick-wall penetrations
- 16 in. flute optimized for concrete debris evacuation through full working depth
- 9/16 in. for specific structural anchor systems requiring this exact bore diameter
- SDS+ shank for tool-free engagement on all SDS+ rotary hammers
Specifications
- Diameter: 9/16 in.
- Flute Length: 16 in.
- Overall Length: 18 in.
- Tip: MX4 4-Cutter Carbide
- Shank: SDS+
Includes
- (1) Milwaukee 48-20-7387 9/16 in. x 18 in. MX4 SDS+ Carbide Drill Bit
