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Carmex Carbide Tiny Tool - Thread Relief, Chamfering & Grooving - MDL - BMK Grade - 4.1mm Minimum Diameter x 0.8mm Reach x R0.5 (Left Hand)
| Application | Thread Relief Chamfering & Grooving (MDL) |
| Groove Depth (L1) | 18 |
| Minimum Diameter | 4.1 |
| Reach (H) | 0.8 |
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The ones our customers buy most.Description
The Carmex Carbide Tiny Tool (MDL) is a compact carbide cutting tool designed for small thread relief, chamfering, and grooving applications. Its precise geometry and small footprint make it ideal for creating threads, chamfers, and grooves on tiny parts and components. Built from premium BMK-grade carbide, it offers excellent durability, strength, and wear resistance. With a 4.1 mm minimum diameter, 0.8 mm reach, and an R0.5 left-hand relief radius, this tool excels in tight spaces and delicate work.
- Compact, precise geometry for tight spaces: Delivers accurate thread relief, chamfers, and grooves on small parts with confident control in restricted cavities.
- Premium BMK-grade carbide for long tool life: Extreme wear resistance maintains sharp cutting edges longer, reducing downtime and the need for frequent tool changes.
- Left-hand cutting with a precise R0.5 chamfer radius: Supports clean left-hand threads and controlled relief, delivering consistent finishes even in challenging setups.
Designed to enhance productivity across machining, prototyping, and small-part fabrication, this tiny tool helps you achieve reliable, repeatable results fast. Its durable carbide construction stands up to demanding materials, while the compact form factor reaches into tight features where larger tools can’t reach. Trustworthy performance from MDL tooling means fewer reworks and smoother workflows for both seasoned operators and hobbyists alike.
Part Numbers
- Protool Part Number
- MDL4R0.5L18BMK
- 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 - Thread Relief, Chamfering & Grooving - Grade BMK (MDR)
View full collection →You are viewing MDL4R0.5L18BMK. Click any other SKU to view its full details.
| Product SKU | Groove Depth | Minimum Diameter | Reach | Radius | Grade | Holder | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|---|
| MDR4R0.5L18BMK | 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 Viewing | 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 |
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