# Diamond core bit Dedra HW4187 — diamond drill core for concrete and brick, diameter 187 mm / length 400 mm

**URL:** https://aio.lv/en/product--dedra-hw4187--10904287
**Data updated:** 2026-03-25 19:53 (EET)
**Category:** Drill Bits
**Manufacturer:** Dedra
**Manufacturer code:** HW4187
**EAN:** 5902628816443
**Warranty:** 1 Year
**Availability:** Available for order
**Price:** 178.99 €
**Prices and availability valid until:** 2026-07-16 23:59
**Price without VAT (21%):** 147.93 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--dedra-hw4187--10904287

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 29.06.2026 | free |
| Pickup points | 02.07.2026 | 1.99 EUR |
| Courier delivery to door | 02.07.2026 | 6.35 EUR |

## Summary description

Diamond core bit Dedra HW4187 is a professional diamond drill core designed for cutting holes in concrete and brick. It has a diameter of 187 mm and a length of 400 mm, suitable for use with compatible core drilling machines and rigs. Recommended for masonry, reinforced concrete openings and plumbing or electrical installations where precise circular cuts are required.

## Long description

Diamond core bit Dedra HW4187 is a professional diamond drill core made for creating precise circular holes in concrete and brick. With a diameter of 187 mm and an overall length of 400 mm, this core bit is intended for use with compatible core drilling machines and rigs. It is designed to cut through masonry and reinforced concrete for openings required by plumbing, electrical installations, ventilation ducts, and other construction tasks.
Advantages
The Dedra HW4187 diamond core bit provides accurate, clean-cut holes with minimal chipping on the edges of the drilled opening. Its diamond-segment cutting edge offers consistent performance and extended life when used under recommended conditions. The rigid steel body keeps the segment alignment stable during operation, supporting efficient drilling progress and reliable removal of the core. Overall design focuses on compatibility with standard wet drilling setups and robust tasks on concrete and brick.
Suitable for
Creating openings in reinforced concrete walls and floors
Drilling holes in brick and masonry for pipe and conduit installation
Making precise circular cuts for ventilation and HVAC ducts
Core sampling and removal of concrete plugs in renovation projects
Key specifications
Cutting diameter: 187 mm
Overall length: 400 mm
Intended material: concrete and brick (including reinforced concrete)
Cutting edge: diamond segments for hard materials
Body: steel core barrel for rigidity
Use: compatible with standard core drilling machines and rigs (wet drilling recommended)
How to use
Secure the core drilling machine to a stable mount or rig and ensure correct alignment with the intended hole. Fit the Dedra HW4187 core bit to the arbor or chuck according to the machine manufacturer's instructions and check that the connection is tight. For best results use wet drilling to cool the diamond segments and suppress dust; maintain steady feed pressure and avoid excessive side loads that could damage segments. Withdraw the bit periodically to remove debris and allow water circulation, then complete the cut and extract the core plug.
Usage recommendations
Use water for cooling during drilling to extend the life of the diamond segments and reduce dust. Match rotational speed and feed rate to the machine and material hardness—medium to low feed pressure for reinforced concrete, smoother feed for brick. Inspect the bit regularly for segment wear and replace if segments are significantly worn or if the barrel shows deformation. Use appropriate personal protective equipment such as eye protection, hearing protection, and respiratory protection when dry drilling or in poorly ventilated areas.

## FAQ

### How much does the Diamond core bit Dedra HW4187 187×400 mm cost, and is it available for purchase?

The price is 178.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 54 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 29.06.2026 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, Installment. All transactions are 100% secure and encrypted.

### Can Diamond core bit Dedra HW4187 187×400 mm be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### 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 Dedra 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 Dedra 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/10904287/67584910_large.webp