What hole sizes can you drill with this step drill bit?

This bit features 9 steps in 1 mm increments covering diameters from 4 mm to 12 mm.

What type of shank does this drill bit feature?

It features a 6 mm 3-flat shank designed to prevent slipping inside the drill chuck.

Which materials can this step drill bit cut?

It is suitable for sheet steel, non-ferrous metals, stainless steel, copper, aluminium, and plastic.

What is the maximum recommended material thickness?

The maximum material thickness is 4 mm.

Do you need to pilot drill or center punch beforehand?

No, the Rapid Strike tip ensures fast, accurate starts on contact without walking.

MILWAUKEE 48899301 increment borer 4-12 mm (9 1 mm increments)

Name: MILWAUKEE 48899301 increment borer 4-12 mm (9 1 mm increments)
Brand: MILWAUKEE
SKU: 02883346
Price: 24.8 EUR
Availability: InStock

Supplier number: MILWAUKEE 48899301 | EAN 0045242342532

Recommended Retail Price €52.21

24.80 tax incl.

€20.49 excl. VAT (incl. all environmental contributions)

On stock - immediately available | we have 2 products in stock.

Delivery by DHL

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Accurate drilling without pre-punching

Practical benefits

Centered Milwaukee drill tip: You start cleanly on target without walking, eliminating the need to center punch or pre-drill sheet metal.
Nine steps in one: Covering 4 to 12 mm, you drill, enlarge, and deburr neat round holes smoothly in a single continuous pass.
Secure grip in chuck: The 6 mm shank with three flat sides prevents slipping inside your drill chuck for steady and controlled drilling.

In a nutshell

The right choise for

Drill clean, accurate holes without pre-punching using the Milwaukee 48899301 step drill bit. Thanks to the Rapid Strike tip, you start on target without wandering, eliminating the need to pilot drill sheet metal. Featuring nine incremental steps from 4 to 12 mm, this bit lets you drill, enlarge, and deburr sheet steel, stainless steel, aluminium, and plastic up to 4 mm thick in one continuous pass. It protects thin panels from tearing and deforming during electrical enclosure or ductwork modifications. The 6 mm 3-flat shank prevents slipping in your chuck, keeping you in complete control.

Product information FAQ

€24.80

In stock - tax incl.

Key features according to our expert

Smallest diameter: 4 mm
Largest diameter: 12 mm
Shank size: 6 mm

Product description

Step drills are ideal for drilling into the following materials: - Ferrous & non-ferrous sheets metals, profiles and pipes. - Copper, brass and aluminium. - Stainless steel. - Plastics. - Maximum material thickness 4 mm. - To ensure best lifetime we recommend the use of a coolant.
Trades: - Electrical: drilling of panels and cabinets for cable gland installation. - Plumbing / HVAC: access holes for pipework and installation. - Metal workers / fabrication: various sizes and hole enlargement. - Automotive: holes for cable installation (mobile telephones, antennas, re-directing electrical wiring). - Maintenance repair operations: various applications, sizes and hole enlargement.
Step Drill advantages over conventional drill bits: - One drill bit to drill multiple sizes - Do more carry less! - Best option for enlarging existing holes. - More durable than twist drill bits, thick core resists breakage. - More accurate and less walking, tip starts on contact. - Clean burr free holes, less reaming required. - Drills plastic without splitting or cracking.
MILWAUKEE Advantages
Spot drill - Drill - Deburr - All in one go
RAPID STRIKE TIP: Accurate start without walking and fast drilling without the need to pre-drill the material.
Special tip and step geometry for jam-free performance - less risk of drill snagging when used with high speed cordless tools and also prevents deformation of the drilled material.
Optimised 2 flute ground sharpened edge geometry for 2 x faster and smoother cutting.
Produced from custom engineered steel with black oxide coating for 4 x longer life.
Optimised for use with high speed cordless drills.
Laser engraved size markings for best long term visibility.
Each step is relief ground to drill and deburr automatically.
With 3 flat secure grip to prevent step drill from slipping in the chuck and ensure maximum transmission of torque.

All Features

Smallest diameter: 4 mm
Largest diameter: 12 mm
Shank size: 6 mm
Number of steps: 9
Overall length (mm): 65
Shaft diameter (mm): 6

Brand MILWAUKEE
02883346
EAN 0045242342532
Supplier number MILWAUKEE 48899301

Frequently asked questions about this product

Answered by specialists

What hole sizes can you drill with this step drill bit?: This bit features 9 steps in 1 mm increments covering diameters from 4 mm to 12 mm.
What type of shank does this drill bit feature?: It features a 6 mm 3-flat shank designed to prevent slipping inside the drill chuck.
Which materials can this step drill bit cut?: It is suitable for sheet steel, non-ferrous metals, stainless steel, copper, aluminium, and plastic.
What is the maximum recommended material thickness?: The maximum material thickness is 4 mm.
Do you need to pilot drill or center punch beforehand?: No, the Rapid Strike tip ensures fast, accurate starts on contact without walking.