Product Description
Milwaukee 3/16 in. x 8 in. MX4 SDS+ Carbide Drill Bit
Model Number: 48-20-7312
The Milwaukee 48-20-7312 is a 3/16 in. diameter x 6 in. flute length x 8 in. overall length MX4 SDS+ Carbide Drill Bit — the premium four-cutter configuration of the 3/16 in. SDS+ concrete bit for faster drilling and longer life compared to standard two-cutter designs in this popular small-diameter anchor drilling size. Milwaukee's MX4 four-cutter tip uses a carbide insert geometry with four active cutting edges engaging the concrete surface simultaneously with each drill rotation — doubling the cutting contacts per revolution versus the two-cutter standard used in conventional SDS+ bits. The additional cutting contacts advance the bit into the concrete material faster and distribute cumulative carbide wear across twice the surface area, delivering both higher drilling speed and proportionally extended bit life in the hard commercial concrete where small-diameter anchor work is concentrated.
The 8 in. overall length extends the working reach of the 3/16 in. MX4 bit beyond the standard 6 in. compact configuration for through-penetrations in standard CMU block walls, deeper concrete screw anchor embedments where longer concrete screw lengths require greater pilot hole depth, and drilling positions where obstacles between the hammer and the wall surface require extra bit length to reach the drilling point. The 6 in. flute length maintains efficient concrete debris evacuation through the full working depth of this extended configuration. The 3/16 in. diameter in MX4 specification is the preferred choice for commercial anchor installation in hard concrete where the 4CT performance advantage delivers meaningful production time savings across large anchor installation quantities. The SDS+ shank provides tool-free engagement in all SDS+ rotary hammers for fast bit changes during production drilling.
See Milwaukee's complete MX4 SDS+ bit lineup for all available diameters and lengths where the four-cutter performance advantage is available — the MX4 range covers the most commonly used commercial anchor drilling sizes.
Features
- MX4 four-cutter tip — faster speed and longer life vs. standard 2-cutter SDS+ bits
- Four cutting edges double contacts per revolution for faster concrete penetration rate
- 8 in. overall length for through-wall CMU and deeper concrete screw embedments
- 6 in. flute length maintains debris evacuation through full working depth
- SDS+ shank for tool-free engagement on all SDS+ rotary hammers
Specifications
- Diameter: 3/16 in.
- Flute Length: 6 in.
- Overall Length: 8 in.
- Tip: MX4 4-Cutter Carbide
- Shank: SDS+
Includes
- (1) Milwaukee 48-20-7312 3/16 in. x 8 in. MX4 SDS+ Carbide Drill Bit
