# Drill bit Proline 77915K — metal drill bit Ø 11.5 mm, length 142 mm, 1 pc

**URL:** https://aio.lv/en/product--proline-77915k--11718257
**Data updated:** 2026-03-08 11:19 (EET)
**Category:** Drill Bits
**Manufacturer:** Proline
**Manufacturer code:** 77915K
**EAN:** 5903755154552
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 10.49 €
**Prices and availability valid until:** 2026-07-15 23:59
**Price without VAT (21%):** 8.67 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--proline-77915k--11718257

## 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

Single Proline drill bit model 77915K designed for metalworking. Cutting diameter 11.5 mm, overall length 142 mm. Supplied as one piece suitable for general metal drilling tasks in workshop or construction settings. Compatible with standard drill chucks; intended for creating through-holes and pilot holes in steel and other metals.

## Long description

Proline 77915K is a single high-speed steel drill bit designed for metalworking. It has a cutting diameter of 11.5 mm and an overall length of 142 mm, supplied as one piece for use in workshops and on construction sites. The bit is suitable for general metal drilling tasks such as creating through-holes and pilot holes in steel and other metals and fits standard drill chucks.
Advantages
The drill features a 135° point angle with chamfering adjustment that enables fast, accurate starts and reduces walking during marking. It is manufactured entirely by precision grinding for consistent geometry and straightness. A titanium nitride coating increases tool life and improves hole finish by reducing friction and wear.
Suitable for
Drilling through-holes in mild and hardened steels
Creating pilot holes prior to tapping or reaming
Workshop, maintenance and on-site metal fabrication tasks
Use with hand drills and stationary drilling machines with standard chucks
Key specifications
Cutting diameter: 11.5 mm
Overall length: 142 mm
Point angle: 135° with chamfering adjustment
Manufacturing method: fully ground flute and point geometry
Coating: titanium nitride (TiN) for extended wear resistance and improved surface finish
Pack format: single piece blister pack
How to use
Secure the drill bit in the chuck and tighten according to the drill manufacturer’s instructions. Select an appropriate rotational speed and feed rate for the metal being drilled—lower speeds for harder metals and higher speeds for softer metals. Use cutting fluid or lubricant for steel and other ferrous alloys to reduce heat and improve tool life. Start drilling with steady pressure, allowing the bit to cut without excessive force, and withdraw periodically to clear chips when drilling deep holes.
Usage recommendations
For best results, use the Proline drill bit at speeds and feeds matched to material hardness, apply appropriate cutting fluid for ferrous metals, and clamp the workpiece securely. Inspect the bit for wear before use and replace when the cutting edge is dull to maintain hole quality.

## Specifications

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

## FAQ

### How much does the Proline 77915K drill bit Ø11.5 mm, 142 mm cost, and is it available for purchase?

The price is 10.49 € (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/11718257/67198165_large.webp