What hole diameters can be drilled with this step drill bit?

This bit features 15 steps to drill hole diameters from 4 mm up to 32 mm in 2 mm increments.

What shank type does the Makita D-40191 have?

It has a 10 mm straight shank with 3 flats (tri-flat) to prevent slipping inside standard drill chucks.

What is the benefit of the titanium (TiN) coating?

The titanium nitride coating reduces friction and heat build-up, extending tool life and cutting performance.

What advantage does the spiral flute design provide?

The spiral flute ensures fast chip clearance, smoother cutting action, and helps prevent the bit from binding.

Which materials can this step drill bit be used on?

It is suitable for sheet metal, non-ferrous metals (copper, zinc), steel, cast iron, and various plastics.

MAKITA D-40191 spiral staircase drill with titanium coating 4-32 mm

Name: MAKITA D-40191 spiral staircase drill with titanium coating 4-32 mm
Brand: MAKITA
SKU: 02625122
Price: 117.6 EUR
Availability: PreOrder

Supplier number: MAKITA D-40191 | EAN 0088381400398

Recommended Retail Price €172.50

117.60 tax incl.

€97.19 excl. VAT (incl. all environmental contributions)

On order: delivered from 12/10/2026

Ordered before 20:00 - delivered as of 12/10/2026
Shipping costs €6.99 VAT included | Free shipping for orders over a total amount of 125 euros
Delivery by DHL

✆ Talk to a specialist

Accurate drilling with Makita

Practical benefits

Fifteen diameters in one: With fifteen stepped increments, you can drill holes from 4 to 32 mm without changing bits.
Durable titanium coating: The tough TiN coating minimizes heat build-up and significantly extends tool life in metal sheets.
Secure three-flat shank: The 10 mm three-flat shank prevents slipping in your chuck, providing dependable torque transfer under load.

In a nutshell

The right choise for

With the Makita D-40191 spiral flute step drill bit, you can effortlessly drill and enlarge holes from 4 to 32 mm in sheet metal, steel, non-ferrous metals, and plastics without switching bits. Its 15 stepped increments allow you to work quickly and precisely, making it ideal for installing cable glands, conduits, or ventilation ducts. The spiral flute ensures smooth cutting action and efficient chip removal, preventing jamming and sheet deformation. Featuring a durable TiN titanium coating, it reduces friction and extends cutting edge life. The 10 mm three-flat shank prevents slipping in standard chucks, delivering dependable power transfer and total control.

Product information FAQ

€117.60

tax incl.

Key features according to our expert

Smallest diameter: 4 mm
Largest diameter: 32 mm
Shank size: 10 mm
Number of steps: 15
Cutting length: 80 mm

Product description

Step drill spiral TiN 4 - 32 mm

All Features

Smallest diameter: 4 mm
Largest diameter: 32 mm
Shank size: 10 mm
Number of steps: 15
Cutting length: 80 mm
Internal diameter: 4 - 32 mm
Length: 102 mm
Working length: 80 mm

Brand MAKITA
02625122
EAN 0088381400398
Supplier number MAKITA D-40191

Frequently asked questions about this product

Answered by specialists

What hole diameters can be drilled with this step drill bit?: This bit features 15 steps to drill hole diameters from 4 mm up to 32 mm in 2 mm increments.
What shank type does the Makita D-40191 have?: It has a 10 mm straight shank with 3 flats (tri-flat) to prevent slipping inside standard drill chucks.
What is the benefit of the titanium (TiN) coating?: The titanium nitride coating reduces friction and heat build-up, extending tool life and cutting performance.
What advantage does the spiral flute design provide?: The spiral flute ensures fast chip clearance, smoother cutting action, and helps prevent the bit from binding.
Which materials can this step drill bit be used on?: It is suitable for sheet metal, non-ferrous metals (copper, zinc), steel, cast iron, and various plastics.