# Drill bit Proline 7 mm, model 78070K, length 109 mm, metal drill bit, 1 piece

**URL:** https://aio.lv/en/product--proline-78070k--11721332
**Data updated:** 2026-03-08 11:24 (EET)
**Category:** Drill Bits
**Manufacturer:** Proline
**Manufacturer code:** 78070K
**EAN:** 5903755154040
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 7.49 €
**Prices and availability valid until:** 2026-07-15 23:59
**Price without VAT (21%):** 6.19 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--proline-78070k--11721332

## 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 78070K is a single 7 mm metal drill bit with a length of 109 mm. Designed for drilling metal, this twist drill offers standard dimensions for general-purpose metalworking tasks. Suitable for use in hand drills and drill presses for creating clean holes in steel, iron and other metal alloys in workshop and maintenance applications.

## Long description

Proline 7 mm metal drill bit with a 109 mm overall length is a single HSS-Co twist drill designed for general-purpose metalworking. The bit features a 135° point angle with chamfering adjustment for reduced walking and faster drilling. Manufactured by full grinding from high-grade high-speed steel with 5% cobalt, this drill bit provides improved heat resistance and dimensional accuracy for clean holes in steels and other hard-to-machine alloys. It is supplied as a single piece in a blister pack suitable for workshop and maintenance use.
Advantages
The combination of HSS with 5% cobalt increases hardness at elevated temperatures and extends cutting life compared with standard HSS bits. A 135° split-point geometry reduces the need for center punching and improves centering on metal surfaces. Fully ground flutes and thinned margins ensure high concentricity and straightness of drilled holes, while the reinforced tip geometry supports drilling into stainless, high-alloy, titanium and heat-resistant steels and cast iron.
Suitable for
Drilling clean holes in steel, stainless steel and high-alloy metals
Workshop maintenance and repair tasks using hand drills or drill presses
Applications that require accurate, straight holes in difficult-to-machine materials
Key specifications
Diameter: 7 mm
Overall length: 109 mm
Material: high-speed steel with 5% cobalt (HSS-Co)
Point angle: 135° with chamfering/split-point geometry
Manufacturing: fully ground twist drill for high accuracy
Suitable materials: high-alloy steels, stainless and acid-resistant steels, titanium, creep-resisting steels and cast iron
Packaging: single piece in blister pack
How to use
Secure the workpiece and select an appropriate clamping method to prevent movement. Fit the 7 mm drill bit into the chuck of a hand drill or drill press and tighten securely. Use a moderate feed rate and appropriate cutting speed for the material being drilled; when working with stainless or high-alloy steels reduce speed and apply cutting fluid to control temperature and extend tool life. Start drilling at low speed to establish the hole, then maintain steady pressure until the hole is complete. Retract periodically to clear chips when drilling deep holes.
Usage recommendations
For best results when drilling stainless, high-alloy or heat-resistant steels, use cutting fluid and lower spindle speeds to minimize heat buildup. When the surface is prone to walking, a center punch or the split-point geometry will help with accurate positioning. Store the drill bit dry in its blister pack to protect the cutting edges.

## Specifications

| Feature | Value |
|---|---|
| Length | 109 mm |
| Metal drill bits diameter | 7 |
| Number of drill bits | 1 pc(s) |

## FAQ

### How much does the Drill bit Proline 78070K 7 mm, 109 mm cost, and is it available for purchase?

The price is 7.49 € (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/11721332/67191784_large.webp