# Drill bit Proline 77155 — metal, Ø 15.5 mm, length 178 mm, 1 pc

**URL:** https://aio.lv/en/product--proline-77155--11914955
**Data updated:** 2026-03-10 09:18 (EET)
**Category:** Drill Bits
**Manufacturer:** Proline
**Manufacturer code:** 77155
**EAN:** 5903755771551
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 16.49 €
**Prices and availability valid until:** 2026-07-09 23:59
**Price without VAT (21%):** 13.63 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--proline-77155--11914955

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 30.06.2026 | free |
| Pickup points | 03.07.2026 | 1.99 EUR |
| Courier delivery to door | 03.07.2026 | 4.99 EUR |

## Summary description

Single Proline 77155 drill bit for metal with a diameter of 15.5 mm and overall length 178 mm. Designed for drilling metal workpieces, this straight shank bit fits compatible chucks and drills. Supplied as one piece, suitable for maintenance, fabrication and on-site metalworking tasks requiring a mid‑size hole.

## Long description

Single Proline 77155 drill bit for metal, diameter 15.5 mm and overall length 178 mm, designed for drilling holes in various metal workpieces. The bit features a straight shank that fits standard chucks and drills used in maintenance, fabrication and on-site metalworking. Manufactured by precision grinding from high‑quality refined high-speed steel (HSS), it provides straight, accurate holes and is supplied as a single piece in a protective plastic tube for safe storage and handling.
Advantages
The 135° point angle with chamfering adjustment enables quick penetration and reduces the need for extensive centre punching. Fully ground construction delivers high precision and excellent straightness of openings, outperforming cylindrical or conventionally ground drills in cutting efficiency. Made from refined HSS, the bit offers increased resistance to abrasion, improved resilience and elevated torsional strength suitable for repeated use in metalworking environments.
Suitable for
 Drilling mid‑size holes in steel and other common metals
 Workshop maintenance and equipment repair
 Fabrication tasks where a 15.5 mm hole is required
 On‑site metalworking and construction jobs with portable drills
Key specifications
 Diameter: 15.5 mm
 Overall length: 178 mm
 Point angle: 135° with chamfering adjustment
 Material: refined high‑speed steel (HSS), fully ground
 Shank type: straight shank compatible with standard chucks
 Packaging: single piece in a plastic rectangular tube
How to use
Select an appropriate drill with a compatible chuck and secure the Proline 15.5 mm bit firmly in the chuck. Mark and, if necessary, centre‑punch the drilling point to improve accuracy. Use steady feed and moderate cutting speed appropriate for the metal being drilled; apply cutting fluid or lubricant where recommended to reduce heat and wear. Withdraw the bit occasionally to clear chips and maintain cutting efficiency. After use, clean the drill and store it in its protective tube to prevent damage.
Usage recommendations
For best results when drilling hardened or thicker metal sections, use cutting fluid, maintain controlled drilling speed and avoid excessive axial force. Inspect the drill periodically for wear and replace when cutting efficiency or precision decreases.

## Specifications

| Feature | Value |
|---|---|
| Length | 178 mm |
| Metal drill bits diameter | 15.5 |
| Number of drill bits | 1 pc(s) |

## FAQ

### How much does the Drill bit Proline 77155 Ø15.5 mm, 178 mm cost, and is it available for purchase?

The price is 16.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 100 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 30.06.2026 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/11914955/67377789_large.webp