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Carmex Carbide Tiny Tool - Boring Bar - MTR - K20 Grade - 2.1mm Minimum Diameter x 10mm Reach x R0.05
| Application | Boring (MTR) |
| Minimum Diameter | 2.1 |
| Reach (L1) | 10 |
| Radius (R) | 0.05 |
| Grade | K20 |
| Holder | SIM****H3 |
Learn more about Klarna
The Carmex Carbide Tiny Tool is a compact, solid carbide boring bar designed for micro-bore work and precise turning on small parts. Its 2.1 mm minimum diameter, 10 mm reach, and R0.05 nose radius let you access tight cavities and produce accurate holes with a smooth finish.
This tool line is available in two coated grades to optimize performance across common materials. The BXC TiN-coated grade delivers reliable cutting at low speeds and performs well with a wide range of stainless steels (ISO P30–P50 / K25–K40). The BMK sub-micron grade features an advanced PVD triple coating for exceptional heat resistance and smooth cutting, suitable as a general-purpose option across materials (ISO K10–K20). Together, they provide long tool life and consistent results in demanding applications.
- Tiny-diameter, long-reach geometry for micro-bore work: With a 2.1 mm minimum diameter, 10 mm reach, and an R0.05 nose radius, this boring bar fits into tight spaces and delivers precise, repeatable holes and finishes.
- Two grade options for versatile material performance: Choose BXC TiN for stainless steels at low speeds or BMK with a triple PVD coating for high heat resistance, enabling reliable cutting across a wide material range.
- Solid carbide durability for consistent results: Built from a rigid carbide core with proven coatings, it resists wear and heat, offering stable cuts and longer tool life in demanding micro-machining tasks.
With its precise geometry and durable coatings, the Carmex Tiny Tool helps you complete micro-boring tasks faster, delivering consistent bore quality and minimizing tool changes. The combination of small diameter, defined reach, and coating options supports efficient workflows from prototyping to production, making it a dependable choice for engineers, machinists, and hobbyists working in tight tolerances.
| Application | Boring (MTR) |
| Minimum Diameter | 2.1 |
| Reach (L1) | 10 |
| Radius (R) | 0.05 |
| Grade | K20 |
| Holder | SIM****H3 |
| L | 39 |
| F | 0.8 |
| D | 3 |
What time are Protool open?
We are open Monday to Friday between 8:30am and 5pm.
Do you offer Free Next Day delivery?
Yes! We offer Free Next Day delivery via Royal Mail Tracked 24 on all orders over £50 ex VAT*. We also offer Free DPD Local Next Day delivery on all orders over £100 ex VAT*.
We also offer the following:
- Royal Mail Tracked 24 — £5.90 (FREE on orders over £50 ex VAT*). Order before 4:30pm for next day delivery. No signature required.
- DPD Local Next Day — £8.00 (FREE on orders over £100 ex VAT*). Standard next day delivery to UK mainland addresses.
- Royal Mail Special Delivery — £12.50. Guaranteed delivery before 1pm the next working day.
- DPD Saturday Delivery — £25.00. Must be ordered on Friday before 4pm. Pre-12pm delivery.
For delivery to Scottish Highlands & Islands, Northern Ireland, Republic of Ireland, or overseas locations, additional charges apply. Please see our delivery page for full details, or call us on 01732 887 334.
*T's & C's and exclusions apply. Please see our delivery page for more information on all our services.
