GRAPHITE cobalt metal drill bit 8.5 mm

Name: Drill bit for metal GRAPHITE 57H048
Brand: GRAPHITE
SKU: 11718493
Price: 9.49 EUR
Availability: InStock

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Drill bit for metal GRAPHITE 8.5 mm cobalt cylindrical shank (57H048)

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Short description

Cobalt metal drill bit by GRAPHITE, 8.5 mm diameter with a cylindrical (walcowy) shank. Designed for drilling into hard metals and alloys, the cobalt composition increases heat and wear resistance for prolonged cutting life. Suitable for use in handheld drills and drill presses for metalworking, repairs and fabrication tasks.

Available for order: 12 pcs.

Warranty: 2 Years

SKU: 11718493

Manufacturer: GRAPHITE

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Deliver the order:

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to the Customer Service Center at Kengaraga 2b, Riga

02.07.2026 {{selectedOffer.officeDeliveryString}}

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Customer service center

2b. Kengaraga str., Riga, Latvia, LV-1063

02.07.2026 {{selectedOffer.officeDeliveryString}}

free

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From 4.99 €

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From 1.99 €

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Payment Methods:

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Product information

Description

GRAPHITE 8.5 mm cobalt drill bit with a cylindrical shank is designed for drilling holes in hard metals and metal alloys. The cobalt-enriched high-speed steel composition increases resistance to heat and wear, providing longer tool life during intensive metalworking. The cylindrical (straight) shank fits standard three-jaw chucks in hand drills and drill presses, making the bit suitable for general metal fabrication, repair and maintenance tasks.

Advantages

The cobalt content improves thermal stability and hardness at elevated cutting temperatures, reducing the risk of premature blunting when drilling stainless steels and other tough alloys. Precision-ground flutes and point geometry ensure effective chip evacuation and consistent hole quality. The straight shank provides simple mounting in common drill chucks without the need for adapters.

Suitable for

Drilling holes in stainless steel and tempered steels
Metal fabrication and workshop repairs
Maintenance tasks requiring durable drill bits
Use with handheld drills and drill presses

Key specifications

Material: cobalt-alloy high-speed steel
Diameter: 8.5 mm
Shank type: cylindrical (straight) shank
Intended use: drilling into hard metals and metal alloys
Flute design: twist flutes for chip evacuation

How to use

Select an appropriate drilling speed and feed for the metal being worked; lower speeds are recommended for stainless and hardened steels to avoid overheating. Secure the workpiece with clamps or a vise and mark the drilling position. Fit the cylindrical shank into the drill chuck and tighten firmly. Use cutting fluid or coolant during drilling to extend tool life and improve hole finish. Withdraw periodically to clear chips if drilling deep holes.

Usage recommendations

For best results when drilling stainless steel or other heat-resistant alloys, use moderate cutting speeds, continuous coolant, and avoid excessive axial force. Inspect the drill bit for wear and sharpen or replace when cutting performance declines.

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Customer questions

FAQ

How much does the GRAPHITE cobalt metal drill bit 8.5 mm cost, and is it available for purchase?

The price is 9.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 12 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 02.07.2026 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. We will assist with consultation, warranty claim processing, and coordination with certified service centers.

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