Please log in here to access all benefits, including promotional discounts and faster checkouts.


Carmex Carbide Tiny Tools - Back Turning Tool (MXL) - Grade BMK - 3.1mm Min Diameter x 10mm Reach (Left Hand)
| Application | Back Turning (MXL) |
| Minimum Diameter | 3.1 |
| Reach (L1) | 10 |
| Radius (R) | 0.10 |
Learn more about Klarna
Compatible holders
The ones our customers buy most.Description
The Carmex Carbide Tiny Tools Small Threading UNJ Tool (MIL) is a precision cutting instrument designed for high-accuracy threading on small parts. Crafted from premium-grade carbide for exceptional durability and wear resistance, this tool delivers consistent UNJ thread profiles with repeatable accuracy. Its compact geometry supports a 3.1 mm minimum diameter and a 10 mm reach, configured in a left-hand orientation to tackle tight-access applications with confidence.
- UNJ threading design for precision threads: Creates high-accuracy UNJ threads on miniature components, reducing guesswork and rework while ensuring reliable fit and performance.
- Premium-grade carbide for durability: Built to resist wear and maintain sharpness under small-diameter threading tasks, delivering long tool life and consistent results across jobs.
- Compact, left-hand geometry for versatile use: The neat 3.1 mm minimum diameter and 10 mm reach in a left-hand configuration offer access to tight spaces and broad machine compatibility, enabling easy setup across a wide range of equipment.
This tool is designed for engineers, machinists, hobbyists, and manufacturers who need dependable, precise threads on micro-scale parts. With its durable carbide construction, compact size, and broad machine compatibility, it helps streamline your micro-threading workflow, reduce downtime, and improve the consistency and quality of your final assemblies.
Part Numbers
- Protool Part Number
- MXL4R0.1L10BMK
- Brand
- Carmex
- Category
- Tiny Tool Inserts
Delivery
Free UK mainland delivery on orders over £50 ex VAT. In-stock items ordered before 4:30pm are dispatched the same working day. Full delivery information.
Returns
14-day returns on unused stock items in original packaging. Special-order and bespoke tooling is non-returnable. Read our returns policy.
Technical Support
Over 30 years of machining experience behind the counter. Call 01732 887334, Mon–Thurs 8:30–17:30, Fri 8:30–16:30.
Trade Accounts
Credit accounts, contract pricing and scheduled call-off orders available for trade customers. Apply for an account.
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 - Back Turning - Grade BMK (MXR)
View full collection →You are viewing MXL4R0.1L10BMK. Click any other SKU to view its full details.
| Product SKU | Minimum Diameter | Reach | Radius | Max Back Turn Depth | Grade | Holder | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|---|
| MXR4R0.15L10BMK | 4.1 | 10 | 0.15 | 0.8 | BMK | SIM****H4 | £26.93 | 5 days | |
| MXR4R0.15L15BMK | 4.1 | 15 | 0.15 | 0.8 | BMK | SIM****H4 | £27.13 | 5 days | |
| MXR4R0.1L10BMK | 3.1 | 10 | 0.1 | 0.5 | BMK | SIM****H4 | £26.93 | 5 days | |
| MXR5R0.2L15BMK | 5.1 | 15 | 0.2 | 1 | BMK | SIM****H5 | £27.35 | 5 days | |
| MXR5R0.2L22BMK | 5.1 | 22 | 0.2 | 1 | BMK | SIM****H5 | £27.68 | 5 days | |
| MXR6R0.2L15BMK | 6.1 | 15 | 0.2 | 1.8 | BMK | SIM****H6 | £28.00 | 5 days | |
| MXR6R0.2L22BMK | 6.1 | 22 | 0.2 | 1.8 | BMK | SIM****H6 | £28.28 | In Stock | |
| MXL4R0.15L10BMK | 4.1 | 10 | 0.15 | 0.8 | BMK | SIM****H4 | £26.93 | 5 days | |
| MXL4R0.15L15BMK | 4.1 | 15 | 0.15 | 0.8 | BMK | SIM****H4 | £27.13 | 5 days | |
| MXL4R0.1L10BMK Viewing | 3.1 | 10 | 0.1 | 0.5 | BMK | SIM****H4 | £26.93 | 5 days | |
| MXL5R0.2L15BMK | 5.1 | 15 | 0.2 | 1 | BMK | SIM****H5 | £27.35 | 5 days | |
| MXL5R0.2L22BMK | 5.1 | 22 | 0.2 | 1 | BMK | SIM****H5 | £27.68 | 5 days | |
| MXL6R0.2L15BMK | 6.1 | 15 | 0.2 | 1.8 | BMK | SIM****H6 | £28.00 | 5 days | |
| MXL6R0.2L22BMK | 6.1 | 22 | 0.2 | 1.8 | BMK | SIM****H6 | £23.90 | 5 days |
No products match your filters.



