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Carmex Thread Mills Solid Carbide - For Aluminium - UN (UNC UNF UNEF UNS) - 9/16 - 5/8, 1 1/8 - 1 5/8 x 18 - UnCoated
| Thread Form | UN (UNC UNF UNEF UNS) |
| Size | 9/16 - 5/8 1 1/8 - 1 5/8 |
| Pitch | 18 |
| Diameter (D) | 12 |
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Description
Engineered for precision aluminum threading, the Carmex AMT Solid Carbide Thread Mill delivers reliable, high-speed performance for machinists and job shops that demand clean, accurate internal threads in UN family forms (UNC, UNF, UNEF, UNS). Designed to handle aluminum’s unique cutting dynamics, this tool harmonizes rigidity, heat resistance, and efficient chip evacuation for consistent results even in demanding production environments.
- Thread form compatibility: Specifically engineered for UN thread forms (UNC, UNF, UNEF, UNS) in aluminum workpieces, ensuring precise engagement and smooth thread finish.
- Material & precision: Solid carbide construction provides exceptional rigidity and wear resistance at high speeds, improving tool life and surface quality.
- Coating: Uncoated cutting edge delivers predictable cutting action and straightforward interaction with aluminum for clean, burr-free threads.
- Shank configuration: Cylindrical shank for versatile holder compatibility; Weldon shank option available on request for quick-change applications.
- Coolant & chip evacuation: Internal coolant bore enhances cooling and efficient chip removal, helping maintain dimensional accuracy and prolonging insert life.
- Size & pitch: Cutting diameter range 9/16–5/8 in, overall length 1 1/8–1 5/8 in, with 18 TPI threading capability, all uncoated for predictable performance in aluminum.
In practical terms, this thread mill from Carmex’s AMT line is ideal for production environments where aluminum components—such as enclosures, housings, and lightweight assemblies—require durable, precise internal threads. The combination of a solid carbide core, uncoated cutting edge, and an internal coolant bore supports rapid material removal, excellent surface finish, and reliable thread consistency across multiple parts. The Weldon-shank option adds flexibility for shops that need fast tool changes or integration with existing tooling systems, making it a standout choice for high-speed aluminum threading tasks that demand repeatable results.
Part Numbers
- Protool Part Number
- AMT1212D3018UNK20
- Brand
- Carmex
- Category
- Thread Mill
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.
Full Range: Carmex Solid Carbide Thread Mills For Aluminium - UN (UNC,UNF,UNEF) (AMT)
View full collection →You are viewing AMT1212D3018UNK20. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Flute Length | Reach | Overall Length | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|
| AMT06032C932UNK20 | No. 8 No. 10 No. 12 | 32 | 9.1 | 9.1 | 58 | £100.90 | 5 days | |
| AMT06048C1420UNK20 | 1/4 | 20 | 14.6 | 14.6 | 58 | £100.90 | 5 days | |
| AMT06052C1428UNK20 | 1/4 | 28 | 14 | 14 | 58 | £100.90 | 5 days | |
| AMT0606C1718UNK20 | 5/16 | 18 | 17.6 | 17.6 | 58 | £100.90 | In Stock | |
| AMT08074C2116UNK20 | 3/8 | 16 | 21.4 | 21.4 | 64 | £134.42 | 5 days | |
| AMT0808D2024UNK20 | 3/8 9/16 - 5/8 | 24 | 20.6 | 20.6 | 64 | £134.42 | 5 days | |
| AMT10092C2320UNK20 | 7/16 | 20 | 23.5 | 23.5 | 73 | £155.06 | 5 days | |
| AMT1212D3018UNK20 Viewing | 9/16 - 5/8 1 1/8 - 1 5/8 | 18 | 30.3 | 30.3 | 84 | £194.02 | 5 days | |
| AMT1616E3816UNK20 | 3/4 | 16 | 38.9 | 38.9 | 105 | £228.88 | 5 days |
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