# Cylindrical cobalt drill bits set 8.5 mm, 5 pcs — GRAPHITE 57H048-5

**URL:** https://aio.lv/en/product--graphite-57h048-5--11379931
**Data updated:** 2026-03-07 20:01 (EET)
**Category:** Drill Bits
**Manufacturer:** GRAPHITE
**Manufacturer code:** 57H048-5
**EAN:** 5902062222114
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 32.99 €
**Prices and availability valid until:** 2026-07-14 23:59
**Price without VAT (21%):** 27.26 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--graphite-57h048-5--11379931

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 03.07.2026 | free |
| Pickup points | 08.07.2026 | 1.99 EUR |
| Courier delivery to door | 08.07.2026 | 4.99 EUR |

## Summary description

Set of five cylindrical cobalt drill bits with 8.5 mm diameter designed for drilling hard metals and alloys. Manufactured by GRAPHITE (model 57H048-5), these solid cobalt bits provide increased heat and wear resistance compared with standard high-speed steel, suitable for use in hand drills and drill presses for metalworking, repair and fabrication tasks.

## Long description

Set of five cylindrical cobalt drill bits with an 8.5 mm diameter designed for drilling through hard metals and heat-resistant alloys. These GRAPHITE cobalt bits are manufactured from high-cobalt tool steel to provide superior wear resistance and maintain cutting edge hardness at elevated temperatures compared with conventional high-speed steel drills. The solid construction and straight shank make them compatible with hand drills and drill presses used in metalworking, maintenance and fabrication tasks.
Advantages
The cobalt composition increases hardness and thermal stability during high-speed drilling, reducing dulling and extending tool life. Precision ground flutes and cutting geometry improve chip evacuation and cutting efficiency when working with stainless steel, cast iron and other tough materials. The straight shank ensures secure clamping in standard chucks and improves concentricity for cleaner, more accurate holes.
Suitable for
Drilling stainless steel and heat-treated steels
Metal fabrication, workshop and industrial maintenance
Repair work requiring durable drill bits for tough alloys
Use in hand drills and bench drill presses
Key specifications
Diameter: 8.5 mm
Quantity: 5 pieces
Material: high-cobalt tool steel (cobalt alloy)
Shank type: straight cylindrical shank for standard chucks
Tip style: ground for metal drilling
How to use
Secure the correct drill bit in the drill chuck ensuring it is firmly clamped and concentric. Mark the drilling position and, if necessary, use a center punch to prevent wandering. Use appropriate cutting speeds and feed rates for the workpiece material and apply cutting fluid when drilling stainless steel or hard alloys to reduce heat build-up and improve chip removal. Start drilling at a steady, controlled speed and moderate pressure; withdraw periodically to clear chips on deep holes.
Usage recommendations
For best results and longer bit life, select a lower speed and steady feed when drilling stainless or heat-treated steels, use a suitable cutting fluid, and avoid excessive dwell in the same spot to prevent overheating.

## FAQ

### How much does the Cylindrical cobalt drill bits set cost, and is it available for purchase?

The price is 32.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 20 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 03.07.2026 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 GRAPHITE 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 GRAPHITE 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/11379931/65870047_large.webp