# Diamond Ball Burr 3.1 mm EXO PRO by EXO — rotary tool bit for grinding and engraving

**URL:** https://aio.lv/en/product--exo-138623--12092090
**Data updated:** 2026-03-13 15:51 (EET)
**Category:** Power Tools Accessories
**Manufacturer:** EXO
**Manufacturer code:** 138623
**EAN:** 5906717445453
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 9.99 €
**Prices and availability valid until:** 2026-07-12 23:59
**Price without VAT (21%):** 8.26 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--exo-138623--12092090

## 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 ball burr EXO PRO (3.1 mm) by EXO is a rotary tool bit with a spherical diamond-coated head designed for precise grinding, shaping, and engraving. Suitable for work on hard materials such as ceramics, glass, stone and hardened alloys. Fits standard rotary and die grinders for detailed surface finishing, deburring, and cavity profiling.

## Long description

Diamond Ball Burr 3.1 mm EXO PRO by EXO is a rotary tool bit with a spherical diamond-coated head designed for precise grinding, shaping and engraving on hard materials. The 3.1 mm ball profile provides controlled contact area for detailed surface finishing, cavity profiling and deburring. The bit is compatible with standard rotary and die grinders and is intended for use where durable abrasive performance and dimensional accuracy are required.
Advantages
The diamond-coated spherical head delivers long-lasting abrasive action and consistent cutting performance on ceramics, glass, stone and hardened alloys. The compact 3.1 mm diameter ball allows access to small radii and tight contours while maintaining stability during rotation. The tool bit is balanced for steady operation in standard rotary and die grinders and offers predictable material removal rates for fine finishing and detailed engraving.
Suitable for
 Precise engraving and detailed carving on glass and ceramics
 Shaping and profiling small cavities in stone and composites
 Deburring and finishing hardened metal parts and alloys
 Model making, jewelry work and dental laboratory tasks requiring fine detail
 Surface refinement before polishing or coating
Key specifications
 Head shape: spherical (ball)
 Head diameter: 3.1 mm
 Abrasive type: diamond-coated surface
 Shaft compatibility: fits standard rotary and die grinders
 Primary materials: suitable for ceramics, glass, stone, hardened alloys
 Typical applications: grinding, shaping, engraving, deburring, cavity profiling
How to use
Secure the rotary tool bit in the collet or chuck of a compatible rotary or die grinder, ensuring firm clamping and correct alignment. Operate the tool at recommended speeds for diamond burs and apply light, even pressure while moving the bit across the workpiece to avoid overheating and premature wear. Use steady, controlled passes to achieve the desired profile or surface finish, and allow periodic cooling breaks when working on heat-sensitive materials. Clean the bit after use to remove debris and maintain abrasive effectiveness.
Usage recommendations
For best results, select motor speeds appropriate for the work material (moderate to high speeds for stone and glass, lower speeds for delicate ceramics) and use water or an appropriate coolant when required to reduce heat and prolong tool life. Wear eye, respiratory and hand protection, and perform work in a well-ventilated area. Replace the bit when abrasive performance diminishes to maintain precision.

## FAQ

### How much does the Diamond Ball Burr EXO PRO 3.1 mm cost, and is it available for purchase?

The price is 9.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 48 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 EXO 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 EXO 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/12092090/68543776_large.webp