# Drill bit Proline 77640 — metal, Ø 4 mm, length 220 mm, 1 pc

**URL:** https://aio.lv/en/product--proline-77640--11718029
**Data updated:** 2026-03-08 11:19 (EET)
**Category:** Drill Bits
**Manufacturer:** Proline
**Manufacturer code:** 77640
**EAN:** 5903755154644
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 8.49 €
**Prices and availability valid until:** 2026-07-16 23:59
**Price without VAT (21%):** 7.02 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--proline-77640--11718029

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 07.07.2026 | free |
| Pickup points | 10.07.2026 | 1.99 EUR |
| Courier delivery to door | 10.07.2026 | 4.99 EUR |

## Summary description

Proline 77640 metal drill bit, single piece with 4 mm diameter and 220 mm overall length. Designed for drilling metal and suitable for use with standard corded or cordless drills and drill presses. Offers a single, long-reach cutting tip for through-holes, maintenance, light fabrication and metalworking tasks.

## Long description

Proline 77640 metal drill bit, single piece with 4 mm diameter and 220 mm overall length. Manufactured from refined high-speed steel (HSS) and fully ground for straightness and dimensional accuracy, this long-reach drill is designed for drilling steel, non-ferrous metals and plastics. The 135° point angle with chamfering adjustment reduces walking on start and speeds up penetration, making it suitable for use with standard corded or cordless drills and drill presses when through-holes or maintenance access are required.
Advantages
The fully ground flute and refined HSS construction provide high concentricity and durability, helping to maintain hole quality over repeated use. The 135° point angle with chamfering adjustment improves centering and reduces the need for pilot holes, while the extra-long 220 mm overall length enables access to recessed or deep workpieces. Supplied as a single piece, the bit is suitable for one-off jobs or for keeping a specific long-reach size on hand.
Suitable for
Drilling through-holes in steel and non-ferrous metals
Maintenance and repair tasks requiring long-reach access
Light fabrication and metalworking where precise straight holes are needed
Drilling plastics and non-structural materials
Key specifications
Material: refined high-speed steel (HSS)
Diameter: 4 mm
Overall length: 220 mm
Point angle: 135° with chamfering adjustment
Fully ground for improved straightness and hole accuracy
Suitable for use in drill presses and hand-held drills
How to use
Mark the drilling position and, if needed, use a center punch to reduce wandering. Select an appropriate spindle speed for the 4 mm HSS bit and the material being drilled (higher speeds for non-ferrous metals and plastics, moderate speeds for steel). Secure the workpiece and clamp it to prevent movement. Use cutting fluid or coolant when drilling steel to prolong bit life and improve chip evacuation. Apply steady pressure and allow the bit to cut without excessive force; withdraw occasionally to clear chips when drilling deep holes.
Usage recommendations
For best results, use a pilot hole or spot-drill when precise location is critical, and maintain recommended cutting speeds and lubrication for the material. Store the bit in its case to protect the cutting edges when not in use.

## Specifications

| Feature | Value |
|---|---|
| Length | 220 mm |
| Metal drill bits diameter | 4 |
| Number of drill bits | 1 pc(s) |

## FAQ

### How much does the Drill bit Proline 77640 — Ø 4 mm, 220 mm cost, and is it available for purchase?

The price is 8.49 € (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 07.07.2026 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/11718029/67198679_large.webp