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Carmex Carbide Tiny Tool - Boring Bar - MTR - K20 Grade - 2.5mm Minimum Diameter x 15mm Reach x R0.1
| Application | Boring (MTR) |
| Minimum Diameter | 2.5 |
| Reach (L1) | 15 |
| Radius (R) | 0.1 |
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Description
The Carmex Carbide Tiny Tool is a compact solid carbide boring bar designed for precision internal boring and general turning tasks. With a 2.5 mm minimum diameter and a 15 mm reach, it accesses tight pockets and short bores while delivering clean, accurate cuts. The R0.1 nose radius helps produce smooth finishes on small-diameter workpieces, and the slender, precision-ground body is optimized for confined-space applications.
- Ultra-compact bore capability: Access tight bores and confined spaces with a 2.5 mm minimum diameter and 15 mm reach, while the R0.1 nose radius delivers clean, smooth finishes on small parts.
- Two optimized coatings for versatility: BXC TiN coating supports low cutting speeds and stainless steels (ISO P30-P50 / K25-K40); BMK sub-micron grade offers advanced PVD triple coating for exceptional heat resistance and smooth cutting across materials (ISO K10-K20).
- K20-grade carbide for durability and precision: Solid carbide construction provides rigidity, stable cutting, and reliable performance across boring and general turning tasks.
This tiny tool is designed to improve workflow by delivering precise, repeatable bore results with fewer tool changes and consistent surface finishes, even on stainless steels and other challenging materials. The combination of compact geometry, coating versatility, and robust carbide construction translates into longer tool life, reduced downtime, and faster completion of tight-tolerance parts—making it a dependable choice for engineers, machinists, and hobbyists alike.
Part Numbers
- Protool Part Number
- MTR2.5R0.1L15K20
- 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.
