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Carmex Thread Mills Carbide - Through Coolant (Flutes) - UN (UNC UNF UNEF UNS) - 9/16, 5/8 - 1 1/8, 1 5/8 x 18 - MT7

SKU:MTZ12113D2618UNMT7

The MTZ Carbide Thread Mills with Through Coolant from Carmex are precision threading tools designed for internal threads in through-holes. Built for reliability in demanding metalworking environm... Read more ↓
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Thread FormUN (UNC UNF UNEF UNS)
Size9/16 5/8 - 1 1/8 1 5/8
Pitch18
Diameter (D)11.3
Flute Length (l)26.1
Shank Diameter (d)12
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£195.69 £260.92
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5 days estimated lead time — subject to availability
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The MTZ Carbide Thread Mills with Through Coolant from Carmex are precision threading tools designed for internal threads in through-holes. Built for reliability in demanding metalworking environments, these carbide mills deliver clean, accurate threads even when coolant access is limited.

  • Through-Coolant Flute Design: coolant travels directly through the flutes to the cutting edge for efficient cooling, improved chip evacuation, and consistent thread quality.
  • Carbide Construction: a solid carbide body provides high rigidity, wear resistance, and extended tool life under demanding threading operations.
  • MT7 Shank: robust MT7 taper offers secure, repeatable toolholding compatible with standard CNC milling centers.
  • Thread Forms Supported: engineered to cut UNC, UNF, UNEF, and UNS thread forms for versatile applications across industries.
  • Through-Hole Threading with Direct Chip Removal: optimized geometry enables direct chip removal in through-hole threading, reducing clogging and improving cycle efficiency.
  • Compatibility with Limited Coolant Setups: designed to perform effectively on machines without external coolant systems, increasing where and how you can thread.
  • Size Options: available in 9/16 in and 5/8 in major diameters, with thread-size capability up to 1-5/8-18 for versatile internal threading needs.

These features translate to tangible benefits: precise, smooth internal threads with reliable repeatability, reduced heat build-up at the cutting edge, and longer tool life thanks to carbide’s wear resistance. The through-coolant delivery minimizes thermal distortion and enhances debris evacuation, leading to cleaner threads and improved surface finish. Whether you’re tackling aerospace-grade fasteners or automotive components, this Carmex MTZ thread mill helps you achieve consistent results, even in setups lacking dedicated coolant infrastructure.

Thread Form UN (UNC UNF UNEF UNS)
Size 9/16 5/8 - 1 1/8 1 5/8
Pitch 18
Diameter (D) 11.3
Flute Length (l) 26.1
Shank Diameter (d) 12
No of Flutes 4
Overall Length (L) 84
Thread Mill Style Standard + Coolant (Flutes)
Internal or External Internal
Coating MT7

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.

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Full Range: Carmex Solid Carbide Thread Mills - UN - With Internal Coolant Through The Flutes (MTZ)

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