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Carmex Carbide Tiny Tool - Boring Bar - MTL - K20 Grade - 4.1mm Minimum Diameter x 15mm Reach x R0.05 (Left Hand)
| Application | Boring (MTL) |
| Minimum Diameter | 4.1 |
| Reach (L1) | 15 |
| Radius (R) | 0.05 |
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Description
Meet the Carmex Carbide Tiny Tool—the Boring Bar built for tight bores and small workpieces. This solid carbide bar is designed for boring and general turning, with two coating options (BXC TiN for stainless steels at low speeds and BMK with triple PVD coating for high heat resistance) and a compact 4.1 mm minimum diameter, 15 mm reach, plus a left-hand nose with an R0.05 radius.
- Two coated carbide grades for versatile performance: The BXC TiN coating delivers efficient cutting at low speeds for stainless steels (ISO P30-P50 / K25-K40), while the BMK grade offers sub‑micron quality with triple PVD coating for high heat resistance and smooth cutting across a wide material range.
- Compact, long‑reach geometry for tight bores: With a 4.1 mm minimum diameter and 15 mm reach, this tiny tool accesses confined pockets while maintaining rigidity. The left‑hand orientation and R0.05 nose radius support clean starts and smooth finishing passes.
- Solid carbide durability for reliable results: Built from carbide, this tool delivers excellent wear resistance and dimensional stability in demanding boring and turning tasks, helping you extend tool life and reduce downtime.
By choosing the Carmex Tiny Tool, you gain precise, repeatable holes in hard‑to‑reach areas without frequent tool changes. The dual‑coating options let you tailor performance to material and cutting conditions, while the compact size and robust carbide construction deliver consistent finishes, reduce downtime, and improve overall workflow efficiency across a range of materials, including stainless steels.
Part Numbers
- Protool Part Number
- MTL4R0.05L15K20
- 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.
