Please log in here to access all benefits, including promotional discounts and faster checkouts.
Carmex Carbide Tiny Tool - Thread Relief, Chamfering & Grooving - MDR - BMK Grade - 4.1mm Minimum Diameter x 0.8mm Reach x R0.5
| Application | Thread Relief Chamfering & Grooving (MDR) |
| Groove Depth (L1) | 18 |
| Minimum Diameter | 4.1 |
| Reach (H) | 0.8 |
| Radius (R) | 0.5 |
| L | 51 |
Learn more about Klarna
The Carmex Carbide Tiny Tool (MDR) BMK Grade is a compact cutting solution engineered for small thread relief, chamfering, and grooving. With a 4.1 mm minimum diameter, 0.8 mm reach, and an R0.5 radius, it delivers precise cuts in tight spaces on tiny parts. Built for engineers, machinists, hobbyists, and maintenance professionals, it makes delicate prep work faster and more predictable.
- Tiny, precise geometry: Designed for accurate thread relief, chamfering, and grooving on small components, enabling clean starts and consistent finishes in tight work areas.
- Premium carbide (BMK Grade, MDR): Delivers excellent wear resistance and long tool life, helping you maintain sharp cutting edges through demanding materials and frequent use.
- Compact access with reliable reach: The 4.1 mm diameter and 0.8 mm reach let you reach recessed features and confined cavities without compromising control or stability.
This tool translates into a smoother workflow: fewer tool changes, less rework, and more consistent results across small-batch jobs. Its durable carbide composition and thoughtful geometry help you achieve precise thread relief, clean chamfers, and neat grooves in a single setup, improving overall productivity and project outcomes.
| Application | Thread Relief Chamfering & Grooving (MDR) |
| Groove Depth (L1) | 18 |
| Minimum Diameter | 4.1 |
| Reach (H) | 0.8 |
| Radius (R) | 0.5 |
| L | 51 |
| B | 1.5 |
| F | 1.8 |
| D | 4.0 |
| Grade | BMK |
| Holder | SIM****H4 |
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 - Thread Relief, Chamfering & Grooving - Grade BMK (MDR)
View full collection →You are viewing MDR4R0.5L18BMK. Click any other SKU to view its full details.
| Product SKU | Groove Depth | Minimum Diameter | Reach | Radius | Grade | Holder | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|---|
| MDR4R0.5L18BMK Viewing | 18 | 4.1 | 0.8 | 0.5 | BMK | SIM****H4 | £26.03 | 5 days | |
| MDR5R0.5L24BMK | 24 | 5.1 | 1.2 | 0.5 | BMK | SIM****H5 | £30.38 | 5 days | |
| MDR6R0.5L27BMK | 27 | 6.1 | 1.4 | 0.5 | BMK | SIM****H6 | £35.65 | 5 days | |
| MDL4R0.5L18BMK | 18 | 4.1 | 0.8 | 0.5 | BMK | SIM****H4 | £26.03 | 5 days | |
| MDL5R0.5L24BMK | 24 | 5.1 | 1.2 | 0.5 | BMK | SIM****H5 | £30.38 | 5 days | |
| MDL6R0.5L27BMK | 27 | 6.1 | 1.4 | 0.5 | BMK | SIM****H6 | £35.65 | 5 days |
No products match your filters.
