Product Description
Milwaukee 1/2 in. x 6 in. MX4 SDS+ Carbide Drill Bit
Model Number: 48-20-7371
The Milwaukee 48-20-7371 is a 1/2 in. diameter x 4 in. flute length x 6 in. overall length MX4 SDS+ Carbide Drill Bit — a premium-tier 1/2 in. SDS+ concrete bit featuring Milwaukee's MX4 four-cutter carbide tip technology for faster drilling and longer life than standard two-cutter SDS+ bits in the same diameter. The MX4 four-cutter design uses a carbide tip configuration with four active cutting edges engaging the concrete surface simultaneously with each drill rotation — doubling the cutting contacts per revolution compared to the two-cutter standard that all conventional SDS+ bits use. This increased cutting contact frequency advances the bit into the concrete material faster per revolution, delivering meaningfully higher drilling speed in hard concrete where the four cutting contacts maintain more consistent material removal momentum than two-cutter designs that lose penetration rate momentum between the two widely-spaced cutting contacts.
The four-cutter geometry also distributes the cumulative wear load across four times the carbide surface area per revolution compared to two-cutter designs at the same diameter — each individual cutting edge on the MX4 tip experiences proportionally less wear per revolution than a two-cutter tip, extending the carbide's service life before reaching the wear threshold that requires bit replacement. The 1/2 in. diameter is among the most heavily used SDS+ bit sizes in commercial construction, covering the anchor pilot holes for the most common structural anchor sizes — the MX4 performance advantage at this popular diameter delivers the most value in high-production anchor drilling environments where drilling speed and bit life directly impact labor cost and project schedule. The 6 in. overall length with 4 in. flute length is the standard compact configuration for most commercial anchor embedment depths and ceiling penetrations.
See Milwaukee's complete MX4 SDS+ bit lineup for all available diameters and lengths — MX4 bits are available in extended lengths and in the diameters most commonly used for structural anchor work in hard commercial concrete.
Features
- MX4 four-cutter tip — faster drilling speed and extended life vs. standard 2-cutter SDS+ bits
- Four cutting edges distribute wear load for proportionally longer carbide service life
- 1/2 in. diameter for the most common structural anchor sizes in commercial construction
- 6 in. overall length for standard anchor embedment depths and ceiling penetrations
- SDS+ shank for tool-free engagement on all SDS+ rotary hammers
Specifications
- Diameter: 1/2 in.
- Flute Length: 4 in.
- Overall Length: 6 in.
- Tip: MX4 4-Cutter Carbide
- Shank: SDS+
Includes
- (1) Milwaukee 48-20-7371 1/2 in. x 6 in. MX4 SDS+ Carbide Drill Bit
