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Carmex Carbide Tiny Tool - Boring Bar - MTR - BMK Grade - 4.1mm Minimum Diameter x 22mm Reach x R0.05
| Application | Boring (MTR) |
| Minimum Diameter | 4.1 |
| Reach (L1) | 22 |
| Radius (R) | 0.05 |
| Grade | BMK |
| Holder | SIM****H4 |
Learn more about Klarna
The Carmex Carbide Tiny Tool is a compact solid carbide boring bar engineered for precision internal boring while also tackling general turning tasks. With a 4.1 mm minimum diameter, 22 mm reach, and a nose radius of R0.05, it fits tight bores and deep features without sacrificing stability or control. Designed for engineers, machinists, and hobbyists alike, this tiny tool delivers reliable performance in confined spaces.
- BMK Grade with advanced PVD triple coating for maximum heat resistance: Sub-micron carbide with a specialized PVD coating provides exceptional edge retention and smooth cutting, even at higher temperatures, giving you consistent, long-lasting performance across a wide range of materials.
- Compact size with long reach for tight bores: The 4.1 mm minimum diameter and 22 mm reach let you access small internal features and deep pockets confidently, while maintaining rigidity and precise control in demanding applications.
- Versatile, general-purpose tool for all materials: Optimized for a broad material set, including stainless steels, this tool supports boring and turning tasks with reliable finishes and reduced need for tool changes.
In practical use, this tiny boring bar helps streamline workflows by handling internal pockets and shallow shoulders in a single setup, delivering clean corners and smooth surfaces. Its BMK-coated carbide construction stands up to demanding jobs, so you spend less time resharpening or swapping tools and more time producing accurate parts with repeatable results.
| Application | Boring (MTR) |
| Minimum Diameter | 4.1 |
| Reach (L1) | 22 |
| Radius (R) | 0.05 |
| Grade | BMK |
| Holder | SIM****H4 |
| L | 51 |
| F | 1.7 |
| D | 4 |
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.
Full Range: Carmex Carbide Tiny Tools - Boring Bars - BMK Grade (MTR)
View full collection →You are viewing MTR4R0.05L22BMK. Click any other SKU to view its full details.
| Product SKU | Minimum Diameter | Reach | Radius | Grade | Holder | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|
| MTR1.2R0L7BMK | 1.2 | 7 | 0 | BMK | SIM****H3 | £25.49 | In Stock | |
| MTR1.2R0L9BMK | 1.2 | 9 | 0 | BMK | SIM****H3 | £25.49 | 5 days | |
| MTR1.5R0.1L6BMK | 1.5 | 6 | 0.1 | BMK | SIM****H3 | £25.49 | 5 days | |
| MTR1.5R0L6BMK | 1.5 | 6 | 0 | BMK | SIM****H3 | £25.49 | 5 days | |
| MTR1R0.05L4BMK | 1 | 4 | 0.05 | BMK | SIM****H3 | £25.49 | 5 days | |
| MTR1R0.05L6BMK | 1 | 6 | 0.05 | BMK | SIM****H3 | £25.49 | 5 days | |
| MTR1R0L6BMK | 1 | 6 | 0 | BMK | SIM****H3 | £25.49 | 5 days | |
| MTR2.5R0.1L10BMK | 2.5 | 10 | 0.1 | BMK | SIM****H4 | £23.17 | 5 days | |
| MTR2.5R0.1L15BMK | 2.5 | 15 | 0.1 | BMK | SIM****H4 | £24.30 | In Stock | |
| MTR2.5R0L10BMK | 2.5 | 10 | 0 | BMK | SIM****H4 | £23.17 | In Stock | |
| MTR2R0.05L10BMK | 2.1 | 10 | 0.05 | BMK | SIM****H3 | £20.98 | In Stock | |
| MTR2R0.05L5BMK | 2.1 | 5 | 0.05 | BMK | SIM****H3 | £24.28 | 5 days | |
| MTR2R0.15L10BMK | 2.1 | 10 | 0.15 | BMK | SIM****H3 | £23.17 | 5 days | |
| MTR2R0.15L5BMK | 2.1 | 5 | 0.15 | BMK | SIM****H3 | £23.17 | 5 days | |
| MTR2R0.1L10BMK | 2.1 | 10 | 0.1 | BMK | SIM****H3 | £24.28 | 5 days | |
| MTR2R0.1L15BMK | 2.1 | 15 | 0.1 | BMK | SIM****H3 | £24.28 | 5 days | |
| MTR2R0L10BMK | 2.1 | 10 | 0 | BMK | SIM****H3 | £24.28 | 5 days | |
| MTR3R0.05L10BMK | 3.1 | 10 | 0.05 | BMK | SIM****H3 | £23.17 | 5 days | |
| MTR3R0.05L15BMK | 3.1 | 15 | 0.05 | BMK | SIM****H3 | £25.17 | 5 days | |
| MTR3R0.1L10BMK | 3.1 | 10 | 0.1 | BMK | SIM****H3 | £25.17 | 5 days | |
| MTR3R0.1L15BMK | 3.1 | 15 | 0.1 | BMK | SIM****H3 | £25.17 | In Stock | |
| MTR3R0.2L10BMK | 3.1 | 10 | 0.2 | BMK | SIM****H3 | £23.17 | In Stock | |
| MTR3R0.2L15BMK | 3.1 | 15 | 0.2 | BMK | SIM****H3 | £25.17 | In Stock | |
| MTR4R0.05L15BMK | 4.1 | 15 | 0.05 | BMK | SIM****H3 | £25.61 | 5 days | |
| MTR4R0.05L22BMK Viewing | 4.1 | 22 | 0.05 | BMK | SIM****H4 | £26.86 | 5 days | |
| MTR4R0.1L10BMK | 4.1 | 10 | 0.1 | BMK | SIM****H4 | £23.71 | In Stock | |
| MTR4R0.1L15BMK | 4.1 | 15 | 0.1 | BMK | SIM****H4 | £25.61 | 5 days | |
| MTR4R0.1L22BMK | 4.1 | 22 | 0.1 | BMK | SIM****H4 | £26.89 | In Stock | |
| MTR4R0.2L10BMK | 4.1 | 10 | 0.2 | BMK | SIM****H4 | £23.71 | 5 days | |
| MTR4R0.2L15BMK | 4.1 | 15 | 0.2 | BMK | SIM****H4 | £25.63 | 5 days | |
| MTR4R0.2L22BMK | 4.1 | 22 | 0.2 | BMK | SIM****H4 | £26.89 | In Stock | |
| MTR4R0.2L30BMK | 4.1 | 30 | 0.2 | BMK | SIM****H4 | £30.48 | 5 days | |
| MTR5R0.05L15BMK | 5.1 | 15 | 0.05 | BMK | SIM****H5 | £26.20 | 5 days | |
| MTR5R0.1L15BMK | 5.1 | 15 | 0.1 | BMK | SIM****H5 | £26.22 | 5 days | |
| MTR5R0.1L22BMK | 5.1 | 22 | 0.1 | BMK | SIM****H5 | £29.89 | 5 days | |
| MTR5R0.1L30BMK | 5.1 | 30 | 0.1 | BMK | SIM****H5 | £33.92 | In Stock | |
| MTR5R0.2L10BMK | 5.1 | 10 | 0.2 | BMK | SIM****H5 | £26.20 | 5 days | |
| MTR5R0.2L15BMK | 5.1 | 15 | 0.2 | BMK | SIM****H5 | £26.20 | In Stock | |
| MTR5R0.2L22BMK | 5.1 | 22 | 0.2 | BMK | SIM****H5 | £29.89 | 5 days | |
| MTR5R0.2L30BMK | 5.1 | 30 | 0.2 | BMK | SIM****H5 | £33.92 | 5 days | |
| MTR5R0.2L40BMK | 5.1 | 40 | 0.2 | BMK | SIM****H5 | £33.90 | 5 days | |
| MTR6R0.05L15BMK | 6.1 | 15 | 0.05 | BMK | SIM****H6 | £26.91 | 5 days | |
| MTR6R0.05L22BMK | 6.1 | 22 | 0.05 | BMK | SIM****H6 | £29.64 | 5 days | |
| MTR6R0.1L15BMK | 6.1 | 15 | 0.1 | BMK | SIM****H6 | £26.91 | 5 days | |
| MTR6R0.1L22BMK | 6.1 | 22 | 0.1 | BMK | SIM****H6 | £30.48 | 5 days | |
| MTR6R0.2L15BMK | 6.1 | 15 | 0.2 | BMK | SIM****H6 | £26.91 | 5 days | |
| MTR6R0.2L22BMK | 6.1 | 22 | 0.2 | BMK | SIM****H6 | £30.48 | In Stock | |
| MTR6R0.2L30BMK | 6.1 | 30 | 0.2 | BMK | SIM****H6 | £34.42 | In Stock | |
| MTR6R0.2L35BMK | 6.1 | 35 | 0.2 | BMK | SIM****H6 | £37.02 | In Stock | |
| MTR6R0.2L40BMK | 6.1 | 40 | 0.2 | BMK | SIM****H6 | £37.91 | 5 days | |
| MTR7R0.2L22BMK | 7.1 | 22 | 0.2 | BMK | SIM****H7 | £32.47 | 5 days | |
| MTR7R0.2L30BMK | 7.1 | 30 | 0.2 | BMK | SIM****H7 | £35.94 | In Stock | |
| MTR8R0.2L15BMK | 8.1 | 15 | 0.2 | BMK | SIM****H8 | £32.40 | 5 days | |
| MTR8R0.2L22BMK | 8.1 | 22 | 0.2 | BMK | SIM****H8 | £36.58 | 5 days | |
| MTR8R0.2L35BMK | 8.1 | 35 | 0.2 | BMK | SIM****H8 | £38.87 | 5 days | |
| MTR10R0.2L35BMK | 10.1 | 35 | 0.2 | BMK | SIM****H10 | £41.21 | 5 days | |
| MTL1.2R0L7BMK | 1.2 | 7 | 0 | BMK | SIM****H3 | £25.49 | 5 days | |
| MTL1.2R0L9BMK | 1.2 | 9 | 0 | BMK | SIM****H3 | £25.49 | 5 days | |
| MTL1.5R0.1L6BMK | 1.5 | 6 | 0.1 | BMK | SIM****H3 | £25.49 | 5 days | |
| MTL1.5R0L6BMK | 1.5 | 6 | 0 | BMK | SIM****H3 | £25.49 | 5 days | |
| MTL10R0.2L35BMK | 10.1 | 35 | 0.2 | BMK | SIM****H10 | £41.21 | 5 days | |
| MTL1R0.05L4BMK | 1 | 4 | 0.05 | BMK | SIM****H3 | £25.49 | 5 days | |
| MTL1R0.05L6BMK | 1 | 6 | 0.05 | BMK | SIM****H3 | £25.49 | 5 days | |
| MTL1R0L6BMK | 1 | 6 | 0 | BMK | SIM****H3 | £25.49 | 5 days | |
| MTL2.5R0.1L10BMK | 2.5 | 10 | 0.1 | BMK | SIM****H3 | £23.15 | 5 days | |
| MTL2.5R0.1L15BMK | 2.5 | 15 | 0.1 | BMK | SIM****H3 | £24.31 | 5 days | |
| MTL2.5R0L10BMK | 2.5 | 10 | 0 | BMK | SIM****H3 | £23.15 | 5 days | |
| MTL2R0.05L10BMK | 2.1 | 10 | 0.05 | BMK | SIM****H3 | £24.28 | 5 days | |
| MTL2R0.05L5BMK | 2.1 | 5 | 0.05 | BMK | SIM****H3 | £24.27 | 5 days | |
| MTL2R0.15L10BMK | 2.1 | 10 | 0.15 | BMK | SIM****H3 | £23.17 | 5 days | |
| MTL2R0.15L5BMK | 2.1 | 5 | 0.15 | BMK | SIM****H3 | £23.17 | 5 days | |
| MTL2R0.1L10BMK | 2.1 | 10 | 0.1 | BMK | SIM****H3 | £24.27 | 5 days | |
| MTL2R0.1L15BMK | 2.1 | 15 | 0.1 | BMK | SIM****H3 | £24.27 | 5 days | |
| MTL2R0L10BMK | 2.1 | 10 | 0 | BMK | SIM****H3 | £24.27 | 5 days | |
| MTL3R0.05L10BMK | 3.1 | 10 | 0.05 | BMK | SIM****H3 | £23.17 | 5 days | |
| MTL3R0.05L15BMK | 3.1 | 15 | 0.05 | BMK | SIM****H3 | £25.17 | 5 days | |
| MTL3R0.1L10BMK | 3.1 | 10 | 0.1 | BMK | SIM****H3 | £25.17 | 5 days | |
| MTL3R0.1L15BMK | 3.1 | 15 | 0.1 | BMK | SIM****H3 | £25.17 | 5 days | |
| MTL3R0.2L10BMK | 3.1 | 10 | 0.2 | BMK | SIM****H3 | £23.17 | 5 days | |
| MTL3R0.2L15BMK | 3.1 | 15 | 0.2 | BMK | SIM****H3 | £25.17 | 5 days | |
| MTL4R0.05L15BMK | 4.1 | 15 | 0.05 | BMK | SIM****H3 | £25.61 | 5 days | |
| MTL4R0.05L22BMK | 4.1 | 22 | 0.05 | BMK | SIM****H4 | £26.86 | 5 days | |
| MTL4R0.1L10BMK | 4.1 | 10 | 0.1 | BMK | SIM****H4 | £23.71 | 5 days | |
| MTL4R0.1L15BMK | 4.1 | 15 | 0.1 | BMK | SIM****H4 | £25.61 | 5 days | |
| MTL4R0.1L22BMK | 4.1 | 22 | 0.1 | BMK | SIM****H4 | £26.89 | 5 days | |
| MTL4R0.2L10BMK | 4.1 | 10 | 0.2 | BMK | SIM****H4 | £23.71 | 5 days | |
| MTL4R0.2L15BMK | 4.1 | 15 | 0.2 | BMK | SIM****H4 | £25.61 | 5 days | |
| MTL4R0.2L22BMK | 4.1 | 22 | 0.2 | BMK | SIM****H4 | £26.89 | 5 days | |
| MTL4R0.2L30BMK | 4.1 | 30 | 0.2 | BMK | SIM****H4 | £30.45 | 5 days | |
| MTL5R0.05L15BMK | 5.1 | 15 | 0.05 | BMK | SIM****H5 | £26.20 | 5 days | |
| MTL5R0.1L15BMK | 5.1 | 15 | 0.1 | BMK | SIM****H5 | £26.20 | 5 days | |
| MTL5R0.1L22BMK | 5.1 | 22 | 0.1 | BMK | SIM****H5 | £29.89 | 5 days | |
| MTL5R0.1L30BMK | 5.1 | 30 | 0.1 | BMK | SIM****H5 | £33.92 | 5 days | |
| MTL5R0.2L10BMK | 5.1 | 10 | 0.2 | BMK | SIM****H5 | £26.18 | 5 days | |
| MTL5R0.2L15BMK | 5.1 | 15 | 0.2 | BMK | SIM****H5 | £26.20 | 5 days | |
| MTL5R0.2L22BMK | 5.1 | 22 | 0.2 | BMK | SIM****H5 | £29.89 | 5 days | |
| MTL5R0.2L30BMK | 5.1 | 30 | 0.2 | BMK | SIM****H5 | £33.92 | 5 days | |
| MTL5R0.2L40BMK | 5.1 | 40 | 0.2 | BMK | SIM****H5 | £33.90 | 5 days | |
| MTL6R0.05L15BMK | 6.1 | 15 | 0.05 | BMK | SIM****H6 | £26.91 | 5 days | |
| MTL6R0.05L22BMK | 6.1 | 22 | 0.05 | BMK | SIM****H6 | £29.65 | 5 days | |
| MTL6R0.1L15BMK | 6.1 | 15 | 0.1 | BMK | SIM****H6 | £26.91 | 5 days | |
| MTL6R0.1L22BMK | 6.1 | 22 | 0.1 | BMK | SIM****H6 | £30.48 | 5 days | |
| MTL6R0.2L15BMK | 6.1 | 15 | 0.2 | BMK | SIM****H6 | £26.30 | 5 days | |
| MTL6R0.2L22BMK | 6.1 | 22 | 0.2 | BMK | SIM****H6 | £25.58 | 5 days | |
| MTL6R0.2L30BMK | 6.1 | 30 | 0.2 | BMK | SIM****H6 | £34.46 | 5 days | |
| MTL6R0.2L35BMK | 6.1 | 35 | 0.2 | BMK | SIM****H6 | £37.02 | 5 days | |
| MTL6R0.2L40BMK | 6.1 | 40 | 0.2 | BMK | SIM****H6 | £37.91 | 5 days | |
| MTL7R0.2L22BMK | 7.1 | 22 | 0.2 | BMK | SIM****H7 | £32.47 | 5 days | |
| MTL7R0.2L30BMK | 7.1 | 30 | 0.2 | BMK | SIM****H7 | £35.97 | 5 days | |
| MTL8R0.2L15BMK | 8.1 | 15 | 0.2 | BMK | SIM****H8 | £32.40 | 5 days | |
| MTL8R0.2L22BMK | 8.1 | 22 | 0.2 | BMK | SIM****H8 | £36.58 | 5 days | |
| MTL8R0.2L35BMK | 8.1 | 35 | 0.2 | BMK | SIM****H8 | £38.87 | 5 days |
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