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11EL28UNJBMA - Carmex Thread Turning External Insert - UNJ (UNJC UNJF UNJEF UNJS) - Left Hand
| Thread Type | External |
| Thread Direction | Left Hand |
| Thread Form | UNJ (UNJC UNJF UNJEF UNJS) |
| Pitch | 28 |
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Description
Carmex Thread Turning External Insert — UNJ Left Hand, model 11EL28UNJBMA, is a versatile cutting insert designed to produce accurate external threads on left-handed workpieces. It supports UNJ thread standards (UNJC, UNJF, UNJEF, UNJS) with its laydown triangular geometry, delivering reliable performance across a broad range of applications.
Known for its consistency and compatibility, this insert helps simplify tooling by covering the majority of common UNJ profiles in a single solution. It’s ideal for engineers, machinists, and shop-floor teams looking for dependable threading results without juggling multiple inserts.
- Broad UNJ compatibility: Covers UNJC, UNJF, UNJEF, and UNJS to minimize tool changes and stock variety while delivering reliable thread profiles.
- Left-hand threading optimized: Specifically engineered for left-handed threads, enabling efficient turning and precise results with fewer passes.
- Triangular laydown geometry: Stable engagement and smooth chip control across a wide range of materials, helping achieve consistent thread quality and longer insert life.
It helps you streamline threading work, reduce tool changes and downtime, and achieve consistent, accurate UNJ threads across materials—ultimately improving production speed, part quality, and overall reliability.
Part Numbers
- Protool Part Number
- 11EL28UNJBMA
- 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.
