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Carmex Carbide Tiny Tool - Boring Bar - MTR - K20 Grade - 2.5mm Minimum Diameter x 10mm Reach x R0
| Application | Boring (MTR) |
| Minimum Diameter | 2.5 |
| Reach (L1) | 10 |
| Radius (R) | 0 |
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Description
The Carmex Carbide Tiny Tool - Boring Bar is a solid carbide micro-machining bar designed for precise bore work and general turning tasks. Its compact geometry lets you reach tight internal features with dependable stability, making it ideal for small-diameter projects and prototypes.
- Ultra-compact boring capability: Access tight internal features with a 2.5 mm minimum diameter and 10 mm reach, delivering stable cuts and accurate hole finishes in small or difficult-to-reach bores.
- Coating options for versatile performance: BXC TiN-coated grade is optimized for low cutting speeds on stainless steels (ISO P30-P50 / K25-K40), while BMK sub-micron grade with triple PVD coatings provides high heat resistance and smoother cutting across a broad range of materials.
- Rigid carbide construction with precise tip geometry: Solid carbide construction delivers consistent rigidity and wear resistance, and the R0 end geometry supports clean engagement in micro bores for reliable, repeatable results.
This tiny boring bar helps you complete micro-scale internal features with confidence, improving workflow by reducing tool changes and setup time. The combination of Coated carbide chemistry and a compact reach supports longer tool life, steadier cutting, and better surface finishes across stainless steels and more, making it a dependable choice for engineers, machinists, and hobbyists tackling small, demanding precision work.
Part Numbers
- Protool Part Number
- MTR2.5R0L10K20
- 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.
