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Carmex Carbide Tiny Tool - Boring Bar - MTL - K20 Grade - 5.1mm Minimum Diameter x 22mm Reach x R0.1 (Left Hand)
| Application | Boring (MTL) |
| Minimum Diameter | 5.1 |
| Reach (L1) | 22 |
| Radius (R) | 0.1 |
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Description
The Carmex Carbide Tiny Tool - Boring Bar for MTL is a compact, solid carbide bar designed for precise boring and general turning. With a 5.1 mm minimum diameter, a 22 mm reach, and a left-hand orientation (R0.1), it’s built to access tight bores and maintain tight tolerances in demanding metalworking tasks. The base is a K20-grade carbide, delivering stiffness and durability for reliable performance over long runs.
This tiny tool line is optimized for both dedicated boring operations and versatile turning jobs, making it a practical choice for engineers, machinists, and hobbyists alike. Its coatings provide flexibility across materials, including stainless steels, and are designed to enhance life and cut quality in real-world shop conditions.
- Compact, precise boring geometry: 5.1 mm minimum diameter, 22 mm reach, and left-hand orientation enable accurate holes in tight spaces with consistent depth control.
- Coatings designed for versatility: Choose the BXC TiN-coated grade for low cutting speeds and stainless steels (ISO P30-P50 / K25-K40), or the BMK sub-micron grade with triple PVD coating for exceptional heat resistance and smooth cutting across a wide range of materials.
- K20 carbide core for durability: A rigid, wear-resistant carbide base supports stable cutting and helps maintain tolerances and surface finish over extended tool life.
In use, this Carmex tiny boring bar delivers dependable performance in confined spaces while handling a variety of materials. The combination of precise geometry, durable K20 carbide, and advanced coatings supports steady finishes, reduced downtime, and overall workflow efficiency—making it a reliable choice for professional shops and serious hobbyists alike.
Part Numbers
- Protool Part Number
- MTL5R0.1L22K20
- 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.
