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Carmex Carbide Tiny Tool - Boring Bar - MTL - K20 Grade - 3.1mm Minimum Diameter x 15mm Reach x R0.05 (Left Hand)
| Application | Boring (MTL) |
| Minimum Diameter | 3.1 |
| Reach (L1) | 15 |
| Radius (R) | 0.05 |
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Description
Carmex Carbide Tiny Tool – Boring Bar is a compact solid carbide bar designed for precise boring and versatile turning tasks. With a 3.1 mm minimum diameter, 15 mm reach, and a left-hand orientation, this tool excels in tight-part machining where consistency and finish matter. It’s the right choice for engineers, machinists, and hobbyists who need reliable performance in small-diameter bores and delicate turning operations.
- Optimized boring and turning geometry: Delivers precise hole sizes and reliable cutting in tight-part work thanks to a compact 3.1 mm minimum diameter, 15 mm reach, and a refined edge design that supports clean finishes.
- Coated carbide grades for wide material compatibility: Choose BXC TiN coating for low cutting speeds on stainless steels, or BMK’s sub-micron grade with triple PVD coating for excellent heat resistance and smoother cuts across a broad range of materials.
- Left-hand configuration with a precise R0.05 edge: The left-hand orientation and small corner radius provide stable cuts, reduce chatter, and help achieve consistent, high-quality finishes in demanding boring and turning tasks.
This carbide boring bar is built to deliver repeatable results in everyday shop environments. The dual coating options extend life and performance across materials and speeds, while the compact form fits into confined setups without sacrificing rigidity or finish quality. Ideal for small-diameter bores and general turning, it supports efficient workflows and confident decision-making for professionals and hobbyists alike.
Part Numbers
- Protool Part Number
- MTL3R0.05L15K20
- 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.
