Product Description
Milwaukee 3/4 in. Titanium Silver and Deming Drill Bit
Model Number: 48-89-4640
The Milwaukee 48-89-4640 is a 3/4 in. Titanium Silver and Deming Drill Bit — a large-diameter precision drill bit for drilling accurately-sized holes through steel, iron, aluminum, and other metals in fabrication, maintenance, and construction applications where the reduced 1/2 in. straight shank of the Silver and Deming design fits in standard 1/2 in. keyless and keyed drill chucks while providing access to the large 3/4 in. cutting diameter that most standard 3/8 in. and 1/2 in. chuck drills cannot accommodate in a full-shank bit. The Silver and Deming design's reduced shank bridges the gap between small standard drill bit diameters that fit in typical drill chucks and large-diameter bits that require dedicated magnetic drills or drill presses — it makes large-diameter metal hole drilling accessible with the corded and cordless drills already in the tool inventory without requiring specialty large-chuck drill equipment for every large-diameter hole.
The Titanium coating is a titanium nitride (TiN) surface treatment applied to the High Speed Steel (HSS) drill body — the TiN coating increases surface hardness and reduces friction at the cutting edge, extending bit life compared to uncoated HSS bits in metal drilling applications where heat generation and cutting edge wear are the primary life-limiting factors. The 3/4 in. cutting diameter with the 1/2 in. reduced shank requires proper setup — a drill press or magnetic drill with adequate speed control and a drilling fluid or cutting oil for lubrication and heat control during large-diameter steel drilling produces the best results. The drill bit's geometry uses a standard split point or conventional 118° point that is standard for large-diameter metal drilling in drill press and magnetic drill applications.
See Milwaukee's complete drill bit lineup for all available Titanium Silver and Deming sizes and for specialty drill bits for different metal drilling applications including cobalt, carbide-tipped, and other high-performance specifications.
Features
- Titanium (TiN) coating for extended cutting life vs. uncoated HSS in metal drilling
- 3/4 in. cutting diameter with 1/2 in. reduced shank for standard drill chuck compatibility
- Silver and Deming design enables large-diameter holes without specialty large-chuck equipment
- For steel, iron, and aluminum drilling in fabrication and maintenance applications
- Use with cutting oil and controlled speed for best results in large-diameter metal drilling
Specifications
- Cutting Diameter: 3/4 in.
- Shank Diameter: 1/2 in. (Reduced)
- Coating: Titanium Nitride (TiN)
- Application: Steel, Iron, Aluminum — Large-Diameter Metal Hole Drilling
Includes
- (1) Milwaukee 48-89-4640 3/4 in. Titanium Silver and Deming Drill Bit
