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Carmex Thread Mills Solid Carbide - With Through Coolant - NPT - 1/2 - 3/4 x 14 - MT7

SKU:MTB16155D2214NPTMT7

The Carmex MTB Solid Carbide Through-Coolant Thread Mill is engineered for reliable, high-precision NPT threading in CNC environments. It’s designed for shops that demand consistent thread qualit... Read more ↓
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Thread FormNPT
Size1/2 - 3/4
Pitch14
Diameter (D)15.5
Flute Length (l)22.7
Shank Diameter (d)16
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£162.44 £216.59
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5 days estimated lead time — subject to availability
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The Carmex MTB Solid Carbide Through-Coolant Thread Mill is engineered for reliable, high-precision NPT threading in CNC environments. It’s designed for shops that demand consistent thread quality from 1/2" to 3/4" diameter with 14 TPI, using a MT7 shank for stable, vibration-minimized cutting.

  • Through-Coolant Bore: Coolant is delivered through the bore to the cutting edges, enhancing chip evacuation and reducing heat buildup in deep or narrow holes.
  • Solid Carbide Construction: A rigid, wear-resistant core that supports higher speeds and longer tool life in demanding threading operations.
  • NPT Thread Milling Range: Precisely milled National Pipe Taper threads from 1/2" to 3/4" with 14 TPI, delivering accurate thread form and consistent tolerances.
  • MT7 Toolholder Interface: Compatible with MT7 spindles for solid engagement, improved runout control, and dependable performance on modern CNC machines.
  • MTB Line Advantage: Builds on Carmex’s MTB platform, combining optimized geometry with integrated cooling to boost productivity and reduce tool wear over time.

In practice, this thread mill enables faster cycle times and cleaner thread surfaces by maintaining cooler, more controlled cutting conditions. The through-coolant design minimizes chip packing and thermal stress, helping extend tool life and maintain tight tolerances across production runs. Its MT7 interface delivers dependable stability, making it a solid choice for job shops and manufacturers tackling internal NPT threading in a range of common metal alloys.

Thread Form NPT
Size 1/2 - 3/4
Pitch 14
Diameter (D) 15.5
Flute Length (l) 22.7
Shank Diameter (d) 16
No of Flutes 4
Overall Length (L) 105
Thread Mill Style Standard + Coolant
Internal or External Internal & External
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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Staff are very helpful and interested in providing a good service making us the customer feel valued.
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honest about stock and prices are competitive.
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Staff are very helpful and polite.Goods that were in stock were dispatched same day and back orders were quick in coming through .
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Buying experience
Phone requests are handled quickly and without any fuss. The website is easy to use and straightforward to order from. It’s especially helpful that it shows real‑time availability, so we don’t need to call to confirm whether parts will arrive.
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Full Range: Carmex Solid Carbide Thread Mills - NPT - With Through Coolant (MTB)

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