# Drill bit Proline 78115K — metal bit Ø11.5 mm, length 142 mm, 1 pc

**URL:** https://aio.lv/en/product--proline-78115k--11914775
**Data updated:** 2026-03-10 09:18 (EET)
**Category:** Drill Bits
**Manufacturer:** Proline
**Manufacturer code:** 78115K
**EAN:** 5903755154163
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 14.49 €
**Prices and availability valid until:** 2026-07-15 23:59
**Price without VAT (21%):** 11.98 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--proline-78115k--11914775

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 06.07.2026 | free |
| Pickup points | 09.07.2026 | 1.99 EUR |
| Courier delivery to door | 09.07.2026 | 4.99 EUR |

## Summary description

Proline 78115K is a single metal drill bit with a diameter of 11.5 mm and overall length of 142 mm. Designed for drilling metal, this twist drill offers a standard shank for use in handheld drills and drill presses. Suitable for workshop, construction and repair tasks requiring a mid-sized hole in steel or other ferrous and non‑ferrous metals.

## Long description

Proline 78115K is a single high-speed steel twist drill designed for metalworking, featuring an 11.5 mm diameter and a total length of 142 mm. The bit has a standard cylindrical shank compatible with handheld drills and drill presses, and is produced by grinding to ensure straightness and hole accuracy. The drill's geometry and material composition make it suitable for drilling a range of ferrous and non‑ferrous metals, including difficult-to-machine alloys.
Advantages
The drill bit is manufactured from premium HSS with 5% cobalt, offering increased hardness and high temperature resistance for extended cutting life. A 135° point angle with chamfering adjustment supports rapid centring and reduced walking at the start of drilling, while the precision grinding process ensures rectilinear holes and consistent performance. The standard shank design provides reliable clamping and compatibility with most chucks.
Suitable for
Drilling holes in steel and stainless steels
Working with high-alloy and acid-resistant metals
Fabrication, maintenance and repair tasks in workshops and construction sites
Use in handheld drills and bench drill presses for mid-sized holes
Key specifications
Diameter: 11.5 mm
Total length: 142 mm
Point angle: 135° with chamfering adjustment
Material: high-speed steel with 5% cobalt (HSS-Co)
Manufacturing: fully ground flute geometry for high accuracy
Suitable materials: high-alloy steels, titanium alloys, acid-resistant and stainless steels, cast iron and other hard-to-machine metals
Suitable for use in handheld drills and drill presses
How to use
Secure the drill bit in the chuck of a handheld drill or drill press, ensuring firm and concentric clamping. Mark and, if necessary, centre-punch the drilling position to reduce walking. Use appropriate cutting speed and feed for the material being drilled; when working with stainless or high-alloy steels, use lower speeds and steady feed to avoid overheating. Apply suitable cutting fluid or lubricant for metal drilling to improve life and chip evacuation. After drilling, retract the bit while the spindle is still turning to clear chips and prevent clogging.
Usage recommendations
For best results on stainless and high-alloy steels, use a light cutting oil, moderate spindle speed, and steady pressure. Inspect the bit before use for straightness and wear, and replace when the cutting edge shows signs of dulling to maintain hole accuracy and reduce workpiece damage.

## Specifications

| Feature | Value |
|---|---|
| Length | 142 mm |
| Metal drill bits diameter | 11.5 |
| Number of drill bits | 1 pc(s) |

## FAQ

### How much does the Drill bit Proline 78115K Ø11.5 mm cost, and is it available for purchase?

The price is 14.49 € (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 06.07.2026 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/11914775/67377815_large.webp