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Carmex Carbide Tiny Tool - Boring Bar - MTR - K20 Grade - 5.1mm Minimum Diameter x 22mm Reach x R0.1
| Application | Boring (MTR) |
| Minimum Diameter | 5.1 |
| Reach (L1) | 22 |
| Radius (R) | 0.1 |
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Description
The Carmex Carbide Tiny Tool is a compact boring bar crafted from solid carbide, designed for precise boring and capable of handling general turning tasks. With a 5.1 mm minimum diameter, 22 mm reach, and a 0.1 mm nose radius, it fits into tight cavities while delivering stable cuts.
Two coating options expand its versatility: BXC TiN coated grade for low cutting speeds and stainless steels (ISO P30-P50 / K25-K40) and BMK sub-micron grade with triple PVD coating for high heat resistance and smooth cutting across materials (ISO K10-K20).
- TiN-coated BXC grade for stainless steels: reduces friction and heat at low cutting speeds, enabling stable, repeatable cuts on a wide range of stainless steels (ISO P30-P50 / K25-K40).
- Sub-micron BMK grade with triple PVD coating: delivers extreme heat resistance and smooth cutting for challenging materials, providing longer tool life and consistent finishes (ISO K10-K20).
- Optimized boring-bar geometry (5.1 mm min dia, 22 mm reach, R0.1): compact form and precise nose radius support reliable insert seating, reduced chatter, and predictable performance in tight bores.
With its dual coating options and precise geometry, the Carmex Tiny Tool empowers you to tackle small-diameter boring and turning tasks with confidence. You can reduce tool changes and cycle times thanks to longer wear life and reliable performance across stainless steels and other materials. The robust carbide substrate and engineered coatings resist heat and wear, delivering consistent finishes and tight tolerances even in demanding settings.
Part Numbers
- Protool Part Number
- MTR5R0.1L22K20
- 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.
