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Carmex Thread Mills Solid Carbide With Chamfer - For Aluminium - UN (UNC UNF UNEF UNS) - 1/4 x 20 - UnCoated
| Thread Form | UN (UNC UNF UNEF UNS) |
| Size | 1/4 |
| Pitch | 20 |
| Diameter (D) | 4.8 |
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Description
Carmex Thread Mills Solid Carbide with Chamfer are engineered for precise internal threading in aluminum, delivering clean, repeatable 1/4-20 threads across UN/UNC/UNF/UNEF/UNS standards. Designed for high-speed machining, this uncoated carbide tool combines rigidity, a smooth cutting edge, and versatile shank options to tackle demanding aluminum workpieces.
- Material: Solid carbide construction for rigidity, wear resistance, and stable performance in aluminum machining.
- Cutting Edge: Uncoated, smooth cutting edge to minimize built-up edge and improve surface finish on aluminum parts.
- Internal Coolant Bore: Integrated coolant channel for effective cooling and chip evacuation during threading.
- Shank Type: Cylindrical shank standard; Weldon shank available upon request for secure drive in heavy-duty applications.
- Thread Compatibility: Supports UN, UNC, UNF, UNEF, and UNS threads in 1/4 x 20 size for versatile aluminum threading needs.
- Brand/Series: Part of the AMT line, crafted for high-speed aluminum threading with reliable precision.
- Coating: Uncoated for predictable performance with aluminum alloys and easier reconditioning if needed.
- Application Focus: Ideal for internal threading in aluminum enclosures, housings, brackets, and other lightweight components.
These thread mills are designed to deliver consistent thread quality at high speeds, with efficient coolant and chip evacuation reducing heat buildup and extending tool life. The combination of solid carbide rigidity, a smooth uncoated cutting edge, and an internal coolant bore helps you achieve accurate thread starts, clean wall finishes, and reliable repeatability across production runs. Whether you’re updating a fixture, machining lightweight aluminum housings, or tapping into aluminum brackets, this Carmex thread mill provides a trusted, shop-ready solution.
Part Numbers
- Protool Part Number
- AMT08048C1420UN-CK20
- 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) - With Cutting Chamfer (AMT-C)
View full collection →You are viewing AMT08048C1420UN-CK20. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Flute Length | Reach | Overall Length | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|
| AMT08048C1420UN-CK20 Viewing | 1/4 | 20 | 14.6 | 14.6 | 64 | £137.30 | 5 days | |
| AMT1006C1718UN-CK20 | 5/16 | 18 | 17.6 | 17.6 | 73 | £158.40 | 5 days | |
| AMT12074C2116UN-CK20 | 3/8 | 16 | 21.4 | 21.4 | 84 | £198.16 | 5 days |
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