# Step Drill Bit AWTools M2-TiAlN spiral 4–20 mm, model AW40931BL

**URL:** https://aio.lv/en/product--awtools-aw40931bl--11719866
**Data updated:** 2026-03-08 11:22 (EET)
**Category:** Drill Bits
**Manufacturer:** AWTools
**Manufacturer code:** AW40931BL
**EAN:** 5903678625993
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 14.99 €
**Prices and availability valid until:** 2026-07-16 23:59
**Price without VAT (21%):** 12.39 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--awtools-aw40931bl--11719866

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 07.07.2026 | free |
| Pickup points | 10.07.2026 | 1.99 EUR |
| Courier delivery to door | 10.07.2026 | 4.99 EUR |

## Summary description

AWTools step (cone) drill bit with spiral flutes, model AW40931BL, made from M2 high-speed steel with TiAlN coating. Cutting range 4–20 mm designed for progressive drilling of sheet metal and thin materials. Spiral geometry aids chip evacuation and stable cutting; suitable for workshop, metalworking and maintenance tasks requiring multiple hole diameters without bit changes.

## Long description

AWTools step drill bit model AW40931BL is a spiral-fluted cone bit made from M2 high-speed steel with a TiAlN (titanium aluminium nitride) surface coating. The stepped cutting range from 4 to 20 mm allows progressive enlargement of holes in sheet metal and other thin materials without frequent tool changes. Spiral geometry improves chip evacuation and contributes to smoother cutting and longer tool life when used under recommended conditions.
Advantages
The TiAlN coating increases surface hardness and heat resistance compared with uncoated HSS, helping to maintain sharp cutting edges during extended drilling. Spiral flutes promote efficient chip evacuation and reduce clogging in pierced material. The stepped profile enables quick switching between hole diameters and reduces setup time for multi-size hole patterns. The bit’s HSS construction balances toughness and wear resistance for typical workshop and maintenance environments.
Suitable for
 Drilling and enlarging holes in sheet metal (steel, stainless steel thin sheets, aluminium)
 Electrical, plumbing and HVAC panel work requiring several hole diameters
 Maintenance, repair and fabrication tasks in workshops and service vehicles
 Thin plastics and composite panels where stepped holes are required
Key specifications
 Material: M2 high-speed steel (HSS)
 Coating: TiAlN (titanium aluminium nitride)
 Cutting range: 4–20 mm (stepped)
 Flute type: Spiral flutes for improved chip removal
 Shank type: Cylindrical shank for standard drill chucks
 Application: Progressive drilling in thin materials and sheet metal
How to use
Secure the step drill bit in a drill or drill press chuck suitable for the shank diameter and ensure the chuck is tightened firmly. Mark the hole center and start drilling at low speed to establish a clean entry point, then increase speed moderately while applying steady axial pressure. For sheet metal and thin materials, use lubricant or cutting fluid when drilling harder alloys to reduce heat buildup and extend tool life. Progress through the stepped diameters until reaching the required hole size, withdrawing occasionally to clear chips when necessary.
Usage recommendations
Use moderate feed and appropriate cutting fluid for stainless steel or hardened materials. Avoid excessive speeds that generate heat beyond the TiAlN coating’s limits. Inspect the bit for wear before precision work and replace when cutting edges become dulled to maintain hole quality.

## FAQ

### How much does the AWTools step drill bit AW40931BL 4–20 mm cost, and is it available for purchase?

The price is 14.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 168 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 07.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All AWTools 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 AWTools service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

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