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11EL18UNBMA - Carmex Thread Turning External Insert - UN (UNC,UNF,UNEF,UNS) - Left Hand
| Thread Type | External |
| Thread Direction | Left Hand |
| Thread Form | UN (UNC UNF UNEF UNS) |
| Pitch | 18 |
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Description
The Carmex Thread Turning External Insert - Left Hand variant (11EL18UNBMA) is a purpose-built cutting insert for external thread turning. Its laydown triangular geometry provides stable, precise engagement and clean thread forms across a broad range of standards. It is designed to work with UNC, UNF, UNEF, and UNS threads, making it a practical choice for shops that handle diverse threading tasks.
Whether you’re a professional machinist, a maintenance technician, or a DIYer tackling threaded components, this insert delivers reliable performance for left-hand threading with fewer tool changes and consistent results.
- Broad thread standard compatibility: Covers UNC, UNF, UNEF, and UNS threads, reducing the need for multiple inserts and speeding up setups.
- Left-Hand threading support: Specifically optimized for left-hand threads, enabling efficient cutting without swapping inserts or tools.
- Stable, precise cutting geometry: Laydown triangular design provides rigidity and reduces chatter for consistent thread form and smooth surface finish on a wide range of materials.
With this insert, you’ll streamline production, minimize downtime, and achieve dependable thread quality across common standards. The robust geometry and proven performance translate into fewer adjustments, faster cycles, and confidence you’re delivering accurate, repeatable results on every job.
Part Numbers
- Protool Part Number
- 11EL18UNBMA
- Brand
- Carmex
- Category
- Thread Turning
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.
