# Drill bit Proxxon 28842 Diamond drill bit Ø 3.8 cm, 1 pc

**URL:** https://aio.lv/en/product--proxxon-28-842--1445297
**Data updated:** 2026-03-07 10:59 (EET)
**Category:** Power Tools Accessories
**Manufacturer:** Proxxon
**Manufacturer code:** 28 842
**EAN:** 4006274288423
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 14.49 €
**Prices and availability valid until:** 2026-07-21 23:59
**Price without VAT (21%):** 11.98 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--proxxon-28-842--1445297

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 14.07.2026 | free |
| Pickup points | 17.07.2026 | 1.89 EUR |
| Courier delivery to door | 17.07.2026 | 4.99 EUR |

## Summary description

Proxxon 28842 is a single diamond drill bit designed for drilling with a diameter of 3.8 cm. Intended for precise cutting and drilling in hard materials where diamond-tipped tools are required. Supplied as one piece, suitable for use with compatible rotary drills and drill presses for masonry, ceramics or similar applications.

## Long description

Proxxon 28842 Diamond drill bit Ø 3.8 cm is a single, diamond-coated hole saw designed for precise cutting and drilling in very hard and brittle materials. Supplied as one piece with a mandrel and a 3/32" (2.35 mm) shank, the wheel has an outer diameter of 38 mm and a cutting rim thickness of approximately 0.6 mm. The tool is intended for use with compatible rotary drills and drill presses when diamond-tipped performance is required for clean, accurate holes in masonry, ceramics and similar substrates.
Advantages
The diamond-coated rim provides high abrasion resistance and consistent cutting performance on hard surfaces. A thin cutting edge (about 0.6 mm) minimises material loss and reduces the need for secondary finishing. The included mandrel with a 3/32" (2.35 mm) shank ensures compatibility with a wide range of handheld drills and drill presses. Overall design delivers precise, round holes with reduced chipping on brittle materials.
Suitable for
 Drilling holes in glass and tempered glass
 Ceramic and porcelain tile hole cutting
 Creating openings in fiberglass and plastics
 Working with non-ferrous metals and thin steel where diamond cutting is needed
 Masonry and stone applications requiring a diamond-tipped hole saw
Key specifications
 Cutting diameter: 38 mm
 Cutting rim thickness: approx. 0.6 mm
 Shank size: 3/32" (2.35 mm)
 Diamond-coated cutting edge for abrasion resistance
 Supply: single piece with mandrel
How to use
Mount the mandrel securely in the drill chuck and ensure the shank is fully seated. Mark the drilling position and start drilling at low speed to establish a guiding groove; apply light, steady pressure and keep the tool perpendicular to the workpiece. For brittle or heat-sensitive materials, use intermittent drilling and coolant (water) to avoid overheating and to extend the diamond rim life. After cutting, stop the drill and carefully remove the tool from the hole to prevent chipping.
Usage recommendations
Use water as coolant during drilling to reduce heat and wash away debris. Select a low to moderate rotational speed and avoid excessive axial force. For best results on tile, start with a pilot groove or use masking tape to reduce slippage. Regularly check the mandrel tightness and replace the bit when cutting performance visibly declines.

## Specifications

| Feature | Value |
|---|---|
| Product colour | Stainless steel |
| Proper use | Drill |
| Suitable for materials | Ceramic, Glass, Plastic |
| Drill bit diameter | 38 mm |
| Shank diameter | 2.35 mm |
| Shank shape | Cylindrical shank |
| Number of drill bits | 1 pc(s) |
| Drill bit type | Diamond drill bit |

## FAQ

### How much does the Proxxon 28842 Diamond drill bit Ø 3.8 cm cost, and is it available for purchase?

The price is 14.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 25 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 14.07.2026 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 Proxxon 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 Proxxon 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/1445297/64674625_large.webp