# Diamond drill bit for porcelain stoneware GRAPHITE 12 mm (57H284)

**URL:** https://aio.lv/en/product--graphite-57h284--11942715
**Data updated:** 2026-03-10 11:47 (EET)
**Category:** Drill Bits
**Manufacturer:** GRAPHITE
**Manufacturer code:** 57H284
**EAN:** 5902062572844
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 6.99 €
**Prices and availability valid until:** 2026-07-16 23:59
**Price without VAT (21%):** 5.78 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--graphite-57h284--11942715

## 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

Diamond drill bit for porcelain stoneware (gres), GRAPHITE model 57H284, 12 mm diameter. Designed for drilling precise holes in hard ceramic, porcelain and gres tiles using wet drilling on tile surfaces, glass and stone. Features a diamond-coated cutting edge for durability and reduced chipping; suitable for tile installation, plumbing, electrical passthroughs and renovation work.

## Long description

Diamond drill bit for porcelain stoneware GRAPHITE 12 mm (57H284) is a specialist wet-drilling tool designed for making precise circular holes in hard ceramic and porcelain tiles, gres and similar dense surfaces. The bit features a diamond-coated cutting edge that increases durability and reduces chipping during drilling. It is intended for use with water-cooling to maintain cutting performance and extend tool life when working on tile surfaces, glass and natural stone.
Advantages
The diamond-coated tip provides stable cutting and long service life when drilling hard glazed tiles and porcelain stoneware. Wet-drilling design helps control heat and dust, preserving the diamond segment and the tile surface. The 12 mm diameter yields standard-size holes suitable for common installation tasks while keeping drilling vibrations and micro-fractures to a minimum. The bit is compatible with standard rotary drills and drill stands when used with appropriate water feed.
Suitable for
 Drilling holes for plumbing fixtures through porcelain and gres tiles
 Making electrical passthroughs for sockets and conduits in tiled walls
 Tile installation and renovation work where precise, clean holes are required
 Wet drilling tasks on ceramic, glazed tiles, glass and some types of natural stone
Key specifications
 Diameter: 12 mm
 Cutting edge: diamond-coated segment for hard surfaces
 Intended drilling method: wet drilling with continuous water cooling
 Suitable materials: porcelain stoneware (gres), ceramic, glazed tiles, glass, natural stone
 Compatibility: standard rotary drills and drill stands when used with water feed
How to use
Secure the workpiece and mark the drilling point. Use a drill with a steady speed and, where possible, a drill stand to keep the bit perpendicular to the surface. Begin drilling at low speed to establish the hole, then apply gentle, consistent pressure while supplying water to the cutting edge to cool and lubricate. Maintain continuous water flow to remove debris and prevent overheating of the diamond segment. After completing the hole, clean the bit and tile surface and allow to dry.
Usage recommendations
Use a constant water supply and moderate drilling speed; avoid excessive pressure or high speed which can damage the diamond coating or cause tile cracking. For best results on large-format tiles, fix the tile securely and consider using a backing support to prevent blowout on the rear face. Wear appropriate eye protection and follow general safety guidelines for power tool operation.

## FAQ

### How much does the GRAPHITE 57H284 diamond drill bit 12 mm cost, and is it available for purchase?

The price is 6.99 € (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 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 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/11942715/67385376_large.webp