# Twist drill bit Irwin 4 mm — model 10502547, 1 piece

**URL:** https://aio.lv/en/product--irwin-10502547--11718488
**Data updated:** 2026-03-08 11:20 (EET)
**Category:** Drill Bits
**Manufacturer:** Irwin
**Manufacturer code:** 10502547
**EAN:** 05709131282891
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 3.99 €
**Prices and availability valid until:** 2026-07-11 23:59
**Price without VAT (21%):** 3.30 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--irwin-10502547--11718488

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | Wednesday | free |
| Pickup points | 22.06.2026 | 1.99 EUR |
| Courier delivery to door | 22.06.2026 | 4.99 EUR |

## Summary description

Twist drill bit by Irwin, model 10502547, single-piece 4 mm diameter designed for standard drilling tasks. Suitable for use in hand drills and drill presses on materials compatible with HSS twist bits (metals, wood, plastics depending on material grade). Compact 1 pc packaging for replacement or small projects.

## Long description

Irwin twist drill bit 4 mm (model 10502547) is a single-piece high-speed steel (HSS) cobalt bit designed for standard and demanding metal drilling tasks. With 5% cobalt enhancement and a heavy-duty web construction, this 4 mm bit offers improved heat and abrasion resistance for use in hand drills and drill presses. The 135° split point reduces bit walking and starts cuts cleanly, while compliance with DIN 338 standards ensures consistent geometry and reliable performance in workshop and industrial environments.
Advantages
The 5% cobalt composition provides increased wear and heat resistance compared with standard HSS bits, enabling longer life when working with alloyed and hardened steels. The heavy-duty web construction increases strength at the core of the bit to resist breakage under higher axial loads. A 135° split point produces fast bite and reduced wandering on the workpiece surface, improving accuracy from the first contact. Manufactured to DIN 338 tolerances, the bit delivers repeatable diameter control and cutting geometry suitable for professional applications.
Suitable for
Drilling holes in alloyed steel and other ferrous metals
General metal fabrication and maintenance tasks
Use in hand-held drills and drill presses for small projects and repairs
Key specifications
Type: Twist drill bit, HSS with 5% cobalt
Diameter: 4 mm
Overall length: 75 mm
Point angle: 135° split point
Shank: Cylindrical
Pack quantity: 1 piece
How to use
Secure the 4 mm Irwin twist drill bit in a drill chuck and ensure it is tightened to prevent slippage. Select an appropriate cutting speed and feed for the material being drilled; lower speeds are recommended for harder or heat-treated steels to reduce heat buildup. Use cutting fluid or coolant when drilling ferrous and stainless steels to extend bit life and improve chip evacuation. Begin drilling with a steady, controlled feed rate and let the split point establish the hole before increasing pressure.
Usage recommendations
For best results, use this HSS cobalt 4 mm bit with proper coolant and moderate speeds when working with alloyed or hardened steels. Avoid excessive side loads and peck-drilling in deep holes to prevent overheating and extend tool life.

## Specifications

| Feature | Value |
|---|---|
| Length | 75 mm |
| Proper use | Drill |
| Carrying case | Yes |
| Working length | 43 mm |
| Suitable for materials | Alloyed steel, Metal, Stainless steel |
| Drill bit diameter | 4 mm |
| Shank shape | Cylindrical shank |
| DIN compliance | 338 |
| Point angle | 135 ° |
| Drill bit material | High-Speed Steel (HSS) |
| Number of drill bits | 1 pc(s) |
| Drill bit type | Twist drill bit |

## FAQ

### How much does the Irwin twist drill bit 10502547 — 4 mm cost, and is it available for purchase?

The price is 3.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 144 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 Wednesday 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 Irwin 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 Irwin 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

https://aio.lv/img/cache/product/11718488/67197650_large.webp