# Cobalt Cylinder Drill Bit 7 mm 10 pcs – GRAPHITE 57H042-10

**URL:** https://aio.lv/en/product--graphite-57h042-10--11721242
**Data updated:** 2026-03-08 11:24 (EET)
**Category:** Drill Bits
**Manufacturer:** GRAPHITE
**Manufacturer code:** 57H042-10
**EAN:** 5902062222084
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 32.49 €
**Prices and availability valid until:** 2026-07-18 23:59
**Price without VAT (21%):** 26.85 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--graphite-57h042-10--11721242

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 10.07.2026 | free |
| Pickup points | 15.07.2026 | 1.99 EUR |
| Courier delivery to door | 15.07.2026 | 4.99 EUR |

## Summary description

Cobalt cylinder (walcowe) drill bits by GRAPHITE, 7 mm diameter, pack of 10 pieces (model 57H042-10). Designed for drilling hard metals and alloys where enhanced wear resistance and heat tolerance are required. Suitable for hand-held drills and drill presses in metalworking, maintenance, and fabrication tasks.

## Long description

The Cobalt Cylinder Drill Bit 7 mm by GRAPHITE is a set of ten precision ground bits engineered for drilling in hard metals and tough alloys. These cylinder-style drill bits use a high-cobalt content steel that increases hardness and hot hardness, providing improved wear resistance and longer life under elevated cutting temperatures. The 7 mm diameter is suitable for common through-holes and pilot holes in metalworking tasks, and the pack of 10 ensures enough tools for small production runs, maintenance or workshop use.
Advantages
The high-cobalt composition delivers greater durability and heat resistance compared with standard HSS bits, reducing chipping and premature wear during high-speed drilling. The cylinder (walcowe) geometry offers stable cutting action and straightforward sharpening when necessary. Supplied as a 10-piece pack, the set provides consistent diameter accuracy across multiple operations and reduces downtime from frequent tool changes.
Suitable for
Drilling stainless steel and hardened steel components
Creating pilot holes prior to tapping or reaming
Maintenance and repair work on machinery and metal structures
Workshop and fabrication tasks requiring durable metal drills
Key specifications
Diameter: 7 mm
Quantity: 10 pieces per pack
Material: high-cobalt high-speed steel
Shank type: straight cylindrical shank suitable for standard chucks
Intended use: drilling in hard metals and alloys
How to use
Secure the drill bit in the chuck of a hand-held drill or drill press, ensuring concentric clamping for accurate holes. Use appropriate cutting speeds and feed rates for the workpiece material—lower speeds for stainless and hardened steels to reduce heat buildup. Apply cutting fluid or coolant to improve chip evacuation and prolong bit life. Back the bit out periodically to clear chips and prevent clogging.
Usage recommendations
For best results, use a suitable cutting lubricant and moderate spindle speeds when drilling hard metals. Inspect bits regularly for wear and replace when edge rounding or chipping reduces hole quality.

## FAQ

### How much does the Cobalt Cylinder Drill Bit 7 mm – GRAPHITE 57H042-10 cost, and is it available for purchase?

The price is 32.49 € (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 10.07.2026 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/11721242/67102467_large.webp