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Carmex Thread Mills Solid Carbide - With Through Coolant - Whitworth BSW BSF - 5/8, 7/8 x 11 - MT7

SKU:MTB12118E3311WMT7

The Carmex Thread Mills Solid Carbide with Through Coolant is built for precision internal threading on imperial Whitworth BSW/BSF standards, using a robust MT7 shank for dependable performance i... Read more ↓
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Thread FormWhitworth BSW BSF
Size5/8 7/8
Pitch11
Diameter (D)11.8
Flute Length (l)33.5
Shank Diameter (d)12
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£137.69 £183.59
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5 days estimated lead time — subject to availability
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The Carmex Thread Mills Solid Carbide with Through Coolant is built for precision internal threading on imperial Whitworth BSW/BSF standards, using a robust MT7 shank for dependable performance in CNC milling centers.

  • Through Coolant: Coolant is delivered through the bore to the cutting edges, aiding chip evacuation and reducing heat buildup for cleaner threads and longer tool life.
  • Solid Carbide Construction: Rigid, wear-resistant substrate designed to maintain thread form and finish even in demanding metals.
  • Whitworth BSW/BSF Compatibility: Specifically engineered to produce accurate Whitworth threads, ensuring fit and function in imperial-threaded components.
  • Dual Diameter Options: Available in 5/8" and 7/8" major diameters with 11 threads per inch, enabling flexible use on common Whitworth applications.
  • MT7 Shank: Precision MT7 interface for secure, repeatable seating on compatible CNC milling machines and tool changers.
  • Optimized Thread Milling Geometry: Designed to create precise internal threads with efficient chip control and consistent surface quality.

This tool is ideal for production and repair environments where reliable Whitworth threading is required in bores. The through-coolant design minimizes chip congestion in deep or awkward holes, reduces cutting temperatures, and support longer tool life, which translates to fewer tool changes and higher uptime. By maintaining accurate thread form and smooth finishes, it helps reduce post-processing time and improves part interchangeability in assemblies that rely on BSW or BSF threads. Whether you’re finishing a precision gearbox housing, hydraulic manifold, or other imperial-threaded components, this Carmex thread mill delivers consistent performance and value.

Thread Form Whitworth BSW BSF
Size 5/8 7/8
Pitch 11
Diameter (D) 11.8
Flute Length (l) 33.5
Shank Diameter (d) 12
No of Flutes 5
Overall Length (L) 84
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 polite.Goods that were in stock were dispatched same day and back orders were quick in coming through .
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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 - Whitworth - With Through Coolant (MTB)

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