Which hole diameters can you drill with this step drill bit?

This Milwaukee step drill bit features 17 steps covering a range from 6 mm to 40.5 mm.

What type of shank does this drill bit have?

It features a 10 mm shank with a 3-flat design to prevent slipping in the drill chuck.

What is the maximum material thickness you can drill?

The recommended maximum material thickness is 4 mm.

Which materials are compatible with this step bit?

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

Do you need to centre-punch or pre-drill before using it?

No, the Rapid Strike tip allows precise centring and fast drilling without pre-drilling.

MILWAUKEE 48899340 step drill bit 6-40.5 mm

Name: MILWAUKEE 48899340 step drill bit 6-40.5 mm
Brand: MILWAUKEE
SKU: 08069752
Price: 78.95 EUR
Availability: PreOrder

Supplier number: MILWAUKEE 48899340 | EAN 0045242547777

Recommended Retail Price €159.30

78.95 tax incl.

€65.25 excl. VAT (incl. all environmental contributions)

On order: delivered from 09/10/2026

Delivery by DHL

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How does it work?

Buy Milwaukee products with a total order value of at least €250 excl. VAT.
For a total order value of €250 excl. VAT up to but excluding €500 excl. VAT, you receive a FREE Milwaukee 12-piece Tri-Lobe screwdriver set (4932472003) worth €55.90.
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The promotion is valid from 01.10.2026 to 31.10.2026.
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Precise and burr-free drilling with Milwaukee

Practical benefits

Drill and deburr simultaneously: With 17 steps from 6 to 40.5 mm, you drill and deburr sheet metal and plastics in a single smooth operation.
Secure grip in chuck: The 10 mm 3-flat shank prevents slipping in the drill chuck, ensuring you transfer maximum torque at all times.
Precise centering without slipping: The specialized tip allows you to start drilling accurately without pre-drilling or wandering across the workpiece.

In a nutshell

The right choise for

Drill and deburr with speed and absolute precision using the Milwaukee 48899340 step drill bit. Featuring 17 steps from 6 to 40.5 mm, this single compact tool replaces a whole set of individual drill bits. It is ideal for electricians, hvac technicians, and metal fabricators installing conduit, junction boxes, or cable glands. The Rapid Strike tip delivers instant centring without the need for punch marks or pre-drilling, cutting cleanly through sheet metal, stainless steel, aluminium, copper, and plastics up to 4 mm thick. The 10 mm 3-flat shank prevents slipping in the drill chuck, ensuring maximum torque transfer and clean, burr-free holes.

Product information FAQ

€78.95

tax incl.

Key features according to our expert

Smallest diameter: 6 mm
Largest diameter: 40,5 mm
Shank size: 10 mm
Number of steps: 17

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: 6 mm
Largest diameter: 40,5 mm
Shank size: 10 mm
Number of steps: 17
Overall length (mm): 90
Shaft diameter (mm): 10

Brand MILWAUKEE
08069752
EAN 0045242547777
Supplier number MILWAUKEE 48899340

Frequently asked questions about this product

Answered by specialists

Which hole diameters can you drill with this step drill bit?: This Milwaukee step drill bit features 17 steps covering a range from 6 mm to 40.5 mm.
What type of shank does this drill bit have?: It features a 10 mm shank with a 3-flat design to prevent slipping in the drill chuck.
What is the maximum material thickness you can drill?: The recommended maximum material thickness is 4 mm.
Which materials are compatible with this step bit?: It is suitable for sheet metals, non-ferrous metals, copper, brass, aluminium, stainless steel, and plastics.
Do you need to centre-punch or pre-drill before using it?: No, the Rapid Strike tip allows precise centring and fast drilling without pre-drilling.