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Carmex Carbide Tiny Tool - Boring Bar - MTL - K20 Grade - 4.1mm Minimum Diameter x 10mm Reach x R0.1 (Left Hand)
| Application | Boring (MTL) |
| Minimum Diameter | 4.1 |
| Reach (L1) | 10 |
| Radius (R) | 0.1 |
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Description
The Carmex Carbide Tiny Tool is a compact solid carbide boring bar designed for precision small-diameter boring and general turning. Its left-hand geometry, 4.1 mm minimum diameter, 10 mm reach, and R0.1 corner radius give you consistent starts and clean finishes in tight spaces.
Built for professionals who need dependable performance across a range of materials, this tool uses two coated carbide grades to match your application. BXC is a PVD TiN coated grade optimized for low cutting speeds and stainless steels (ISO P30-P50 / K25-K40); BMK is a sub-micron grade with a triple PVD coating that delivers high heat resistance and smooth cutting across different materials (ISO K10-K20).
- Compact precision for tight bores: 4.1 mm minimum diameter, 10 mm reach, and R0.1 left-hand geometry enable precise starts and clean finishes in confined workpieces.
- Coated carbide for versatile cutting: BXC PVD TiN coating supports low cutting speeds and stainless steels (ISO P30-P50 / K25-K40); BMK is a sub-micron grade with a triple PVD coating (ISO K10-K20) for high heat resistance and smooth cutting—giving you options for a wide range of materials and conditions.
- Durable, general-purpose performance: Solid carbide construction provides reliable life and stable cutting for boring and general turning across many materials, reducing tool changes and downtime.
By choosing this tiny tool, you gain a compact, dependable boring bar that fits tight bores and delivers consistent hole quality. The dual-coated grades support optimized performance across materials and speeds, while the carbide's durability helps you maintain productivity with fewer tool changes and repeatable results—enhancing workflow and overall performance on every project.
Part Numbers
- Protool Part Number
- MTL4R0.1L10K20
- 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.
