Milwaukee 48899372 Cobalt ALCrN Step Drill Bit 4-20mm
Milwaukee 48899372 Cobalt AlCrN Step Drill Bit 4-20mm
Product Description
The Milwaukee 48899372 Cobalt AlCrN Step Drill Bit 4-20mm is a professional-grade drilling accessory engineered for fast, precise and efficient hole cutting in steel and stainless steel. Featuring advanced Aluminium Chromium Nitride (AlCrN) coating, this high-performance step drill bit delivers up to 10 times longer service life compared with standard Milwaukee step drill bits, making it an excellent choice for electricians, metal fabricators, mechanical engineers and maintenance professionals.
Designed with Milwaukee RAPID STRIKE TIP technology, the drill bit provides accurate starting without wandering across the workpiece. Its innovative tip geometry enables fast drilling without the need for a pilot hole, helping reduce preparation time and improve productivity. The specially designed cutting steps also minimise snagging and material deformation, providing smoother and more controlled drilling, particularly when used with cordless power tools.
The optimised two-flute cutting geometry features precision-ground, sharpened edges that deliver up to twice the cutting speed compared with conventional Milwaukee step drills. This efficient design supports smoother cutting and improved material removal when drilling through suitable steel and stainless steel components.
Featuring 10 cutting steps across a 4-20mm diameter range, the Milwaukee 48899372 allows users to create different hole sizes with a single drill bit. The 8mm three-flat secure grip shank helps prevent slipping inside the drill chuck while ensuring effective torque transmission. Laser-engraved size markings provide clear, long-lasting visibility, making it easier to select the required drilling diameter during installation and fabrication work.
Key Features
- 4-20mm Step Drilling Range: Provides multiple hole diameters using a single drill bit, reducing the need for frequent tool changes.
- Advanced AlCrN Coating: Aluminium Chromium Nitride coating delivers excellent wear resistance and extended durability.
- Up to 10 Times Longer Life: Designed to provide up to 10 times the service life of standard Milwaukee step drill bits.
- Suitable for Steel and Stainless Steel: Engineered for professional metal drilling applications.
- RAPID STRIKE TIP Technology: Enables accurate drilling starts without wandering and eliminates the need for pre-drilling.
- Anti-Snag Cutting Geometry: Specially designed tip and steps help reduce drill jamming and material deformation.
- Optimised Two-Flute Design: Precision-ground cutting edges provide up to twice the cutting speed and smoother drilling performance.
- 10 Cutting Steps: Allows convenient drilling of different hole diameters within the 4-20mm range.
- 8mm Three-Flat Secure Grip Shank: Helps prevent slipping in the drill chuck and supports efficient torque transmission.
- Laser-Engraved Size Markings: Provides clear, durable diameter identification for accurate hole sizing.
- Cordless Tool Compatibility: Designed to deliver controlled drilling performance when used with suitable cordless drills.
- Professional Construction: Suitable for demanding electrical installation, fabrication and maintenance applications.
Product Specifications
- Brand: Milwaukee
- Manufacturer Part Number: 48899372
- Product Type: Cobalt AlCrN Step Drill Bit
- Drilling Diameter Range: 4-20mm
- Number of Steps: 10
- Coating: Aluminium Chromium Nitride (AlCrN)
- Tip Technology: RAPID STRIKE TIP
- Cutting Geometry: Optimised Two-Flute Design
- Shank Type: Three-Flat Secure Grip
- Shank Diameter: 8mm
- Overall Length: 62mm
- Size Markings: Laser Engraved
- Suitable Materials: Steel and Stainless Steel
- Pack Quantity: 1 Piece
- EAN Code: 045242603862
Suitable Applications
- Drilling accurate 4-20mm holes in steel and stainless steel
- Creating cable entry holes in suitable metal electrical enclosures
- Electrical installation and control panel fabrication
- Metalworking and sheet metal fabrication
- Mechanical engineering and workshop drilling
- Installation of metal brackets and mounting components
- Maintenance and repair of steel equipment
- Professional drilling applications using suitable cordless or corded drills
Why Choose the Milwaukee 48899372 Step Drill Bit?
The Milwaukee 48899372 combines durable AlCrN coating, RAPID STRIKE TIP technology and optimised two-flute cutting geometry to deliver reliable drilling performance. Its 10-step design reduces the need to change drill bits when producing different hole sizes, while the secure grip shank and laser-engraved markings improve control and convenience. For professionals regularly drilling steel and stainless steel, this step drill bit offers an efficient and versatile cutting solution.
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