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Carmex Carbide Tiny Tool - Boring Bar - MTR - K20 Grade - 1.2mm Minimum Diameter x 7mm Reach x R0
| Application | Boring (MTR) |
| Minimum Diameter | 1.2 |
| Reach (L1) | 7 |
| Radius (R) | 0 |
| Grade | K20 |
| Holder | SIM****H3 |
Learn more about Klarna
The Carmex Carbide Tiny Tool - Boring Bar (MTR - K20 Grade) is a compact, solid carbide bar designed for precision boring and reliable turning in tight spaces. With a 1.2 mm minimum diameter, 7 mm reach, and an R0 cutting edge, it enables clean starts and accurate bore geometry on small-workpiece features. This tiny tool is built to perform in challenging setups, making it ideal for engineers, machinists, and hobbyists who value precision in limited-space operations.
- Ultra-compact bore capability: Precisely engineered for tiny bores with a 1.2 mm minimum diameter and 7 mm reach, plus an R0 edge for clean, starting cuts and tight tolerances.
- Coating options for versatile performance: Choose between BXC with PVD TiN coating for low cutting speeds and stainless steels (ISO P30-P50 / K25-K40), or BMK with sub-micron, triple PVD coating for high heat resistance and smooth cutting (ISO K10-K20). These options expand compatibility across materials and speeds.
- Durable carbide, general-purpose design: Solid carbide construction supports boring and general turning, delivering reliable results across a broad range of materials, including stainless steels, with longevity and consistent performance.
This tiny tool is built to enhance your workflow: it handles precision boring in tight cavities and also covers general turning duties, reducing setup time and rework. The coating options help manage heat and wear for longer tool life, while the compact geometry enables access to hard-to-reach features. For shops needing dependable small-diameter tooling that delivers repeatable results, this MTR K20-grade boring bar provides a confident, one-tool solution.
| Application | Boring (MTR) |
| Minimum Diameter | 1.2 |
| Reach (L1) | 7 |
| Radius (R) | 0 |
| Grade | K20 |
| Holder | SIM****H3 |
| L | 39 |
| F | 0.6 |
| 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.
