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Carmex Carbide Tiny Tool - Boring Bar - MTR - K20 Grade - 5.1mm Minimum Diameter x 15mm Reach x R0.1
| Application | Boring (MTR) |
| Minimum Diameter | 5.1 |
| Reach (L1) | 15 |
| Radius (R) | 0.1 |
| Grade | K20 |
| Holder | SIM****H5 |
Learn more about Klarna
The Carmex Carbide Tiny Tool is a solid carbide boring bar designed for precision in tight spaces. While built primarily for boring, it also handles general turning, giving you a versatile option for small-diameter work. With a 5.1 mm minimum diameter, a 15 mm reach, and a precise R0.1 nose, this tool is tailored for accessing tight bores and fine finishing tasks. It belongs to the MTR family with a K20 grade, delivering reliable performance across stainless steels and other materials.
- Coating options optimized for stainless steel: The BXC TiN-coated variant is designed for lower cutting speeds, delivering smoother cuts, reduced wear, and longer tool life when machining a wide range of stainless steels (ISO P30-P50 / K25-K40).
- Extreme heat resistance and smooth cutting: The BMK sub-micron grade with advanced triple PVD coating provides exceptional heat resistance and a consistently smooth cutting action, maximizing performance in demanding materials.
- Compact geometry for tight bores and versatile turning: With a 5.1 mm minimum diameter, 15 mm reach, and R0.1 nose, this tiny tool accesses narrow pockets and tight features while still handling general turning tasks reliably.
Choosing the Carmex Tiny Tool means reliable, repeatable results in constrained spaces. Its solid carbide construction and purpose-built coatings are designed to withstand demanding machining conditions, reducing downtime and delivering consistent finishes across stainless steels and other materials. Whether you’re machining small-diameter bores or performing precise turning, this tool supports efficient workflows, fewer tool changes, and dependable performance job after job.
| Application | Boring (MTR) |
| Minimum Diameter | 5.1 |
| Reach (L1) | 15 |
| Radius (R) | 0.1 |
| Grade | K20 |
| Holder | SIM****H5 |
| L | 51 |
| F | 2.1 |
| D | 5 |
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.
