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

This step drill bit has 12 steps for diameters of 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, and 39 mm.

What materials is this HSS step drill bit suitable for?

It is suitable for thin materials such as sheet steel, non-ferrous metals, stainless steel, and plastics.

What type of shank does this bit have?

It has a 3-flat shank with a 10 mm diameter to prevent slipping in the chuck.

Do you need to pilot drill or center punch first?

No, the split point enables direct self-centering without the need for center punching or pilot drilling.

What is the step height for each diameter?

The step height is 4 mm per diameter increment.

BOSCH 2608597521 step drill HSS 6-39, 10 x 93.5 mm

Name: BOSCH 2608597521 step drill HSS 6-39, 10 x 93.5 mm
Brand: BOSCH
SKU: 02092619
Price: 91.8 EUR
Availability: PreOrder
Rating: 1 (1 reviews)

Supplier number: BOSCH 2608597521 | EAN 3165140107365

Recommended Retail Price €213.67

91.80 tax incl.

€75.87 excl. VAT (incl. all environmental contributions)

On order: delivered from 17/10/2026

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Ordered before 20:00 - delivered as of 17/10/2026
Shipping costs €6.99 VAT included | Free shipping for orders over a total amount of 125 euros
Delivery by DHL
Delivered from Belgium

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Accurate drilling across multiple diameters

Practical benefits

Versatile drilling with Bosch: You effortlessly create 12 different hole sizes from 6 to 39 mm without changing drill bits.
Accurate start without punching: The split-point tip allows you to begin drilling immediately and precisely without any pre-punching required.
Smooth and vibrationless operation: The spiral flute optimizes chip clearance and minimizes vibrations to ensure clean, burr-free holes in metal.

In a nutshell

The right choise for

With the Bosch 2608597521 step drill bit, you drill precisely and smoothly into thin materials like sheet steel, stainless steel, non-ferrous metals, and plastic. Offering twelve steps from 6 to 39 mm, it allows you to create or enlarge various hole sizes without changing bits, making it ideal for installing cable glands and conduits in enclosures. The split-point tip centres instantly, so you can start drilling immediately without pilot drilling or centre punching. Its spiral flute reduces vibrations and optimizes chip removal for clean, burr-free holes. The 10 mm 3-flat shank prevents slipping in the drill chuck, giving you full control and reliable torque transfer throughout your job.

Product information FAQ

€91.80

tax incl.

Key features according to our expert

Smallest diameter: 4 mm
Largest diameter: 39 mm
Shank size: 10 mm

Product description

Step drill bit HSS 6-39, 10 x 93.5 mm
Smooth drilling of various diameters with one drill bit
HSS step drill bit can drill smooth holes of various diameters with one drill bit
Pre-punching is unnecessary as the split tip enables easy drilling

Advantages

Drilling various diameters - The HSS step drill bit can make smooth, burr-free holes of various diameters with a single drill bit.
The drill bit is ideal for deburring, drilling round holes and enlarging existing holes.
Pre-punching is unnecessary as the split tip allows easy drilling.
The CNC ground spiral groove offers optimised chip removal and reduced vibration for uniform drilling.
Axial and radial back grinding ensure excellent cutting performance and absolute smoothness.
This step drill is suitable for use on thin materials, such as non-ferrous metals, sheet plastic, sheet steel, plastic and stainless steel.
The step drill is made of HSS (High-Speed Steel) and will last a long time if coolant is used.
Using laser, the hole diameters in both spiral grooves are clearly visible and durably marked.
In addition, the 3-surface shank prevents slipping in the chuck and ensures high torque transfer.
3-surface shank for drills.

All Features

Smallest diameter: 4 mm
Largest diameter: 39 mm
Shank size: 10 mm
Implementation: HSS
Overall length mm: 93,5
Shaft diameter mm: 10
Stair height mm: 4
Stair diameter (range) mm: 6-39
Stair diameter (all) mm: 6 / 9 / 10 / 12 / 15 / 18 / 21 / 24 / 27 / 30 / 33 / 36 / 39

Brand BOSCH
02092619
EAN 3165140107365
Supplier number BOSCH 2608597521

Frequently asked questions about this product

Answered by specialists

What hole diameters can you drill with this step drill bit?: This step drill bit has 12 steps for diameters of 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, and 39 mm.
What materials is this HSS step drill bit suitable for?: It is suitable for thin materials such as sheet steel, non-ferrous metals, stainless steel, and plastics.
What type of shank does this bit have?: It has a 3-flat shank with a 10 mm diameter to prevent slipping in the chuck.
Do you need to pilot drill or center punch first?: No, the split point enables direct self-centering without the need for center punching or pilot drilling.
What is the step height for each diameter?: The step height is 4 mm per diameter increment.