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Carmex Carbide Tiny Tool - Boring Bar - MTR - K20 Grade - 3.1mm Minimum Diameter x 10mm Reach x R0.05
| Application | Boring (MTR) |
| Minimum Diameter | 3.1 |
| Reach (L1) | 10 |
| Radius (R) | 0.05 |
| Grade | K20 |
| Holder | SIM****H3 |
Learn more about Klarna
The Carmex Carbide Tiny Tool - Boring Bar is a compact solid carbide bar designed for precision boring and versatile turning. Built in the MTR format with K20 grade, it features a 3.1 mm minimum diameter, a 10 mm reach, and a precise R0.05 nose radius to deliver clean, accurate holes in tight spaces.
Engineers, machinists, and hobbyists will appreciate its coating options—BXC with PVD TiN for stainless steels at lower cutting speeds, and BMK with an advanced triple PVD coating for high heat resistance. This gives dependable performance across a broad material range while helping maximize tool life and cutting stability.
- Two advanced coating options for longer life: BXC TiN coating supports reliable performance at low cutting speeds on stainless steels, while BMK’s sub-micron, triple PVD coating delivers exceptional heat resistance and smoother cutting for tougher materials.
- Compact, precise geometry for tight bores: 3.1 mm minimum diameter, 10 mm reach, and a 0.05 mm nose radius enable accurate bore finishing in confined spaces with consistent surface quality.
- Versatile for boring and general turning: Optimized for boring yet capable of handling general turning tasks, extending tool life and reducing tool changes across a range of materials.
With Carmex Carbide Tiny Tool, you gain reliable, repeatable bore quality, smoother cuts, and reduced downtime thanks to advanced coatings and adaptable performance. Its compact size is ideal for close-tolerance work in stainless steel and other demanding alloys, helping you meet tight specs with confidence.
| Application | Boring (MTR) |
| Minimum Diameter | 3.1 |
| Reach (L1) | 10 |
| Radius (R) | 0.05 |
| Grade | K20 |
| Holder | SIM****H3 |
| L | 39 |
| F | 1.3 |
| 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.
