Milwaukee 48899399 Step Drill Bit Set - 3 Piece
Milwaukee 48899399 Step Drill Bit Set - 3 Piece
Product Description
The Milwaukee 48899399 Step Drill Bit Set is a professional 3-piece drilling kit designed for creating precise, clean holes in sheet metal, stainless steel, copper, brass, aluminium and plastics. Featuring three versatile step drill bits covering sizes from 4mm to 35mm, this set provides an efficient solution for electricians, plumbers, HVAC installers, metal fabricators, automotive technicians and maintenance professionals.
Engineered with Milwaukee RAPID STRIKE TIP technology, these step drill bits provide accurate drilling starts without wandering across the workpiece. The innovative tip design eliminates the need for pre-drilling, helping reduce preparation time and improve productivity. Each bit combines spotting, drilling and deburring into a single operation, allowing users to produce clean, accurately sized holes with minimal additional finishing.
The optimised two-flute cutting geometry features precision-ground, sharpened edges that deliver up to twice the cutting speed and smoother drilling performance. Specially designed cutting steps help minimise snagging, reduce material deformation and improve control when used with suitable high-speed cordless drills.
Manufactured from specially engineered steel with a black oxide coating, the Milwaukee step drill bits are designed to provide up to four times longer service life. Their robust construction offers excellent durability for demanding drilling applications, while the thick core helps resist breakage compared with conventional twist drill bits.
Each step drill bit features laser-engraved size markings for clear, long-lasting diameter identification and a three-flat secure grip shank to help prevent slipping inside the drill chuck. Suitable for drilling materials up to 4mm thick, the Milwaukee 48899399 set is ideal for creating new holes, enlarging existing openings and carrying out professional installation and fabrication work.
Key Features
- 3-Piece Step Drill Bit Set: Includes three versatile step drill bits covering drilling diameters from 4mm to 35mm.
- Multiple Hole Sizes: Allows users to drill different diameters with a single bit, reducing the need for frequent tool changes.
- RAPID STRIKE TIP Technology: Provides accurate drilling starts without wandering and eliminates the need for pilot holes.
- Spot, Drill and Deburr: Combines three drilling operations into one convenient process for clean, accurately finished holes.
- Optimised Two-Flute Geometry: Precision-ground cutting edges provide up to twice the cutting speed and smoother performance.
- Anti-Snag Step Design: Helps reduce jamming and material deformation during drilling.
- Black Oxide Coating: Specially engineered steel construction with protective coating delivers up to four times longer service life.
- Robust Core Construction: Designed to resist breakage and provide durability during demanding drilling tasks.
- Automatic Deburring: Relief-ground steps help produce clean holes with minimal burr formation.
- Three-Flat Secure Grip Shank: Helps prevent slipping in the drill chuck and supports effective torque transmission.
- Laser-Engraved Size Markings: Provides clear and durable diameter identification for accurate hole sizing.
- Suitable for Cordless Drills: Optimised for use with compatible high-speed cordless drilling equipment.
- Multi-Material Compatibility: Suitable for ferrous and non-ferrous sheet metals, stainless steel, copper, brass, aluminium and plastics.
- Maximum Material Thickness: Designed for drilling suitable materials up to 4mm thick.
Set Contents
- 1 x Milwaukee Step Drill Bit 4-12mm
- 1 x Milwaukee Step Drill Bit 4-20mm
- 1 x Milwaukee Step Drill Bit 6-35mm
Product Specifications
- Brand: Milwaukee
- Manufacturer Part Number: 48899399
- Product Type: Step Drill Bit Set
- Set Size: 3 Piece
- Included Drill Bit Sizes: 4-12mm, 4-20mm and 6-35mm
- Overall Drilling Diameter Range: 4-35mm
- Drill Bit Material: Specially Engineered Steel
- Coating: Black Oxide
- Tip Technology: RAPID STRIKE TIP
- Cutting Geometry: Optimised Two-Flute Design
- Shank Type: Three-Flat Secure Grip
- Size Markings: Laser Engraved
- Maximum Material Thickness: 4mm
- Suitable Materials: Steel, Stainless Steel, Copper, Brass, Aluminium, Ferrous and Non-Ferrous Sheet Metals, and Plastics
- Pack Quantity: 3 Pieces
- EAN Code: 045242344420
Suitable Applications
- Drilling accurately sized holes in steel and stainless steel sheets
- Creating cable gland openings in electrical panels and cabinets
- Enlarging existing holes in sheet metal and suitable plastic materials
- Electrical installation and control panel fabrication
- Plumbing and HVAC installations requiring pipework access holes
- Metal fabrication and workshop drilling applications
- Automotive installations involving wiring, antennas and accessories
- Drilling copper, brass and aluminium components
- Maintenance and repair work requiring multiple hole diameters
- Producing clean holes in plastics with reduced risk of cracking
Recommended Usage
For optimum drilling performance and extended tool life, use a suitable cutting coolant or lubricant when drilling metals. Select the appropriate drilling speed for the material and diameter, and ensure the workpiece is securely supported. The maximum recommended material thickness is 4mm.
Why Choose the Milwaukee 48899399 Step Drill Bit Set?
The Milwaukee 48899399 combines three versatile step drill bits with RAPID STRIKE TIP technology, durable black oxide coating and optimised cutting geometry. Its ability to drill multiple hole sizes, enlarge existing openings and deburr material in one operation makes it a practical choice for professionals looking to improve drilling efficiency while reducing the number of individual drill bits required.
Data Sheet: