Please log in here to access all benefits, including promotional discounts and faster checkouts.
Carmex Carbide Tiny Tool - Boring Bar - MTR - K20 Grade - 2.1mm Minimum Diameter x 5mm Reach x R0.15
| Application | Boring (MTR) |
| Minimum Diameter | 2.1 |
| Reach (L1) | 5 |
| Radius (R) | 0.15 |
| Grade | K20 |
| Holder | SIM****H3 |
Learn more about Klarna
The Carmex Carbide Tiny Tool is a precision boring bar built from solid carbide, designed for internal turning and tight-bore work. Ideal for engineers, machinists, and hobbyists who need accurate small-diameter cuts, this tool delivers dependable performance in restricted spaces. The MTR variant uses a K20-grade carbide for durability, with a geometry tuned for tiny bores to help you finish precisely and consistently.
With a 2.1 mm minimum diameter, a 5 mm reach, and a sharp R0.15 tip, it excels at finishing small internal features and pockets. While primarily designed for boring, it also handles general turning tasks, giving you flexible capability in a single tool without swapping setups.
- Compact bore-capable geometry: 2.1 mm minimum diameter, 5 mm reach, and a 0.15 mm radius tip enable precise, repeatable internal cuts in tight bores and pockets.
- Coated carbide options for versatile materials: Choose BXC TiN-coated grade for low-speed stainless-steel work (ISO P30-P50 / K25-K40), or BMK sub-micron grade with advanced PVD triple coating for high heat resistance and smooth cutting across materials (ISO K10-K20).
- Durable, reliable performance: Solid carbide construction and optimized geometry deliver long tool life, consistent results, and reduced downtime in boring and turning tasks.
By incorporating the Carmex Tiny Tool into your workflow, you gain access to tight bore capability, improved finish quality, and consistent results across projects. The robust coatings protect against heat and wear, extending tool life and reducing replacement frequency, while the compact form minimizes setup time and tool changes. Whether you’re producing small components, performing repairs, or tackling precision modifications, this tiny boring bar helps you complete more work in less time with confidence.
| Application | Boring (MTR) |
| Minimum Diameter | 2.1 |
| Reach (L1) | 5 |
| Radius (R) | 0.15 |
| 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.
