# Step drill bits Bosch HSS with 3-flat shank (model 2608597519)

**URL:** https://aio.lv/en/product--bosch-2608597519--4292790
**Data updated:** 2026-03-07 11:13 (EET)
**Category:** Drill Bits
**Manufacturer:** Bosch
**Manufacturer code:** 2608597519
**EAN:** 3165140107341
**Warranty:** 2 Years
**Availability:** Out of stock

## Summary description

Bosch HSS step drill bits with a 3-flat shank (MPN 2608597519) are designed for stepwise drilling and enlarging holes in suitable materials. Made from high-speed steel (HSS), these step bits fit chucks that accept a 3-flat shank and are intended for use with drills for creating graduated hole diameters. Suitable for workshop and installation tasks requiring progressive hole sizing.

## Long description

Bosch HSS step drill bits with a 3-flat shank are designed for progressive drilling and enlarging of holes in thin materials. Made from high-speed steel, the stepped geometry allows drilling several diameters with a single tool and produces smooth, burr-reduced holes. The split-point tip provides fast centre positioning without pre-punching, while the CNC-ground spiral flute promotes effective chip evacuation and reduced vibration for even drilling action. Laser-marked diameter indicators in the spiral flutes ensure clear, durable size identification during work.
Advantages
The HSS construction delivers high hardness and wear resistance suitable for repeated use when coolant is applied. Axial and radial relief grinding ensure consistent cutting performance and smooth hole edges. The split-point tip enables immediate engagement and reduces walking on start. The 3-flat shank prevents slipping in chucks that accept this shank form and improves torque transmission, while the spiral flute geometry supports optimised chip removal for cleaner holes and less heat build-up.
Suitable for
Drilling and enlarging holes in non-ferrous metals
Working with sheet steel and stainless steel thin sheets
Cutting holes in sheet plastics and plastic panels
Workshop and installation tasks requiring multiple hole diameters with one tool
Key specifications
Material: High-speed steel (HSS)
Shank type: 3-flat shank for improved chuck grip and torque transfer
Cutting geometry: Split-point tip for reduced walking and no pre-punching
Flute design: CNC-ground spiral flutes for optimised chip evacuation
Markings: Laser-marked diameter indicators in flutes for easy size reading
Intended material thickness: Thin sheets and panels (metals and plastics)
How to use
Secure the step drill bit in a compatible drill chuck that accepts a 3-flat shank, ensuring firm clamping to prevent movement. Select the appropriate rotational speed and, where applicable, apply coolant or lubricant to extend tool life and reduce heat. Start drilling with light pressure to allow the split-point tip to engage the material, then increase pressure steadily while following the stepped diameters to reach the required hole size. Withdraw the bit periodically to clear chips and maintain a consistent cutting action.
Usage recommendations
For best results use on thin materials such as non-ferrous metals, sheet steel, stainless steel thin sheets and plastics. Apply cutting fluid when machining metals to improve life and surface finish. Avoid excessive lateral force; let the stepped geometry and correct speed do the cutting. Ensure the drill is compatible with a 3-flat shank to prevent slippage and maintain accurate hole sizing.

## Specifications

| Feature | Value |
|---|---|
| Proper use | Drill |

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### What is the warranty period?

All Bosch products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Bosch service centers and through AiO.lv

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