# Diamond Core Drill Bit for Porcelain Gres 18 mm GRAPHITE 57H285

**URL:** https://aio.lv/en/product--graphite-57h285--11943097
**Data updated:** 2026-03-10 11:48 (EET)
**Category:** Drill Bits
**Manufacturer:** GRAPHITE
**Manufacturer code:** 57H285
**EAN:** 5902062572851
**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--graphite-57h285--11943097

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 03.07.2026 | free |
| Pickup points | 08.07.2026 | 1.99 EUR |
| Courier delivery to door | 08.07.2026 | 4.99 EUR |

## Summary description

Diamond core drill bit sized 18 mm by GRAPHITE (model 57H285) designed for drilling through porcelain gres and similar hard ceramic materials. The core bit uses a diamond cutting edge to provide efficient hole-making in dense tiles and slabs. Suitable for use with compatible rotary drills and water cooling for cleaner cuts and extended tool life; ideal for tile installation, plumbing, electrical conduit, and sample extraction.

## Long description

Diamond Core Drill Bit for Porcelain Gres 18 mm by GRAPHITE is a diamond-segmented core designed for drilling clean, precise holes in porcelain gres and other very hard ceramic materials. The 18 mm diameter is suitable for common installations where a narrow, accurate hole is required. The bit is intended for use with compatible rotary drills and benefits from water cooling to reduce heat, limit dust, and extend cutting life.
Advantages
The diamond cutting edge provides efficient cutting action through dense, vitrified surfaces while maintaining shape and edge integrity. Using water cooling reduces thermal stress and prolongs tool life, and the segmented crown design helps remove cut material for smoother penetration. Its standard 18 mm diameter supports repeatable hole sizes for plumbing, electrical routing, and fixture installation.
Suitable for
 Drilling clean holes in porcelain gres and dense ceramic tiles
 Plumbing installations for pipe and fixture passage
 Electrical conduit and cable routing through tiled surfaces
 Sampling small cores from tile and slab materials
Key specifications
 Diameter: 18 mm
 Cutting material: diamond segments
 Recommended cooling: water-cooled operation
 Compatible tool type: rotary drill / drill with appropriate adapter
 Primary material suitability: porcelain gres and hard ceramics
How to use
Install the core bit into a compatible rotary drill or drill press with the proper chuck or adapter. Mark the drilling position on the tile, secure the workpiece to prevent movement, and begin drilling at low speed to establish a steady bite. Apply a continuous or intermittent water feed to the drilling area to cool the diamond segments and wash away slurry. Maintain moderate pressure; excessive force can cause overheating or cracking of the tile. After completing the hole, stop the drill and allow the bit to cool before removing.
Usage recommendations
Use with a guide or jig for perpendicular holes and keep RPMs and feed pressure within manufacturer guidelines for porcelain gres. Wear appropriate eye and hand protection, control water run-off, and ensure the drill is powered down before changing accessories. For best results, use steady water flow and avoid dry drilling on vitrified surfaces.

## FAQ

### How much does the Diamond Core Drill Bit 18 mm GRAPHITE 57H285 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 — 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 03.07.2026 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 GRAPHITE 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 GRAPHITE 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/11943097/67385828_large.webp