# Drill bit Proline 78085K, metal, Ø 8.5 mm, length 117 mm, 1 pc

**URL:** https://aio.lv/en/product--proline-78085k--11914830
**Data updated:** 2026-03-10 09:18 (EET)
**Category:** Drill Bits
**Manufacturer:** Proline
**Manufacturer code:** 78085K
**EAN:** 5903755154071
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 9.49 €
**Prices and availability valid until:** 2026-07-21 23:59
**Price without VAT (21%):** 7.84 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--proline-78085k--11914830

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 14.07.2026 | free |
| Pickup points | 17.07.2026 | 1.89 EUR |
| Courier delivery to door | 17.07.2026 | 4.99 EUR |

## Summary description

Proline 78085K metal drill bit with an 8.5 mm diameter and 117 mm overall length. Supplied as a single piece, this drill bit is intended for drilling metal and compatible with standard drill chucks. Suitable for workshop and repair tasks where a single, specific-size metal bit is required for precise hole making.

## Long description

Proline 78085K metal drill bit, diameter 8.5 mm and overall length 117 mm, is a single-piece high-speed steel tool with 5% cobalt content designed for drilling metal. The bit features a 135° point angle with chamfering adjustment for faster, more accurate starts and is produced entirely by grinding to ensure straightness and dimensional accuracy. Its construction provides high temperature resistance and improved wear life when machining hard-to-cut materials.
Advantages
The combination of HSS alloyed with 5% cobalt and precision grinding delivers high hardness, thermal stability and consistent hole accuracy. The 135° point angle with chamfering adjustment reduces walking at the start of drilling and speeds up marking and entry. The bit is suitable for use in standard drill chucks and its design supports drilling in high-alloy steels, titanium, acid-resistant and stainless steels, creep-resisting steels and cast iron with high durability.
Suitable for
Drilling precise holes in high-alloy and stainless steels
Workshop and repair jobs requiring a single specific-size metal bit
Machining titanium and acid-resistant materials
Drilling cast iron and other difficult-to-machine metals
Key specifications
Material: high-speed steel (HSS) with 5% cobalt
Cutting point angle: 135° with chamfering adjustment
Diameter: 8.5 mm
Overall length: 117 mm
Manufacturing: fully ground flutes for high accuracy and straightness
Temperature resistance: high, suitable for elevated cutting temperatures
Compatibility: fits standard drill chucks
How to use
Secure the drill bit in a standard drill chuck ensuring concentric clamping and correct axial alignment. Select a suitable cutting speed and apply appropriate cutting fluid when machining stainless or heat-resistant alloys to reduce temperature and prolong tool life. Start drilling with light pressure to allow the 135° point to locate the hole, then increase feed gradually. Retract periodically on deep holes to clear chips and maintain coolant flow.
Usage recommendations
Use recommended cutting speeds and feeds for the specific workpiece material; employ cutting fluid for stainless, high-alloy and titanium materials; avoid excessive feed rates that may cause premature wear. Inspect the bit for wear before use and replace when cutting performance deteriorates.

## Specifications

| Feature | Value |
|---|---|
| Length | 117 mm |
| Metal drill bits diameter | 8.5 |
| Number of drill bits | 1 pc(s) |

## FAQ

### How much does the Drill bit Proline 78085K Ø8.5 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 — 200 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 14.07.2026 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 Proline 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 Proline 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/11914830/67377807_large.webp