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Carmex Thread Mills Carbide - Through Coolant (Flutes) - Whitworth BSW BSF - 5/8, 7/8 x 11 - MT7

SKU:MTZ12109D2811WMT7

The Carmex MTZ carbide thread mill is a through-coolant cutting tool engineered for precise Whitworth BSW and BSF threading in through-holes. It’s built for shops that demand consistent thread qua... Read more ↓
P
M
K
N
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Thread FormWhitworth BSW BSF
Size5/8 7/8
Pitch11
Diameter (D)10.9
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£260.92
Prices shown ex. VAT
5 days estimated lead time — subject to availability
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Free delivery over £50 ex VAT
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14-day returns
30+ years expertise
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01732 887334
Mon – Thurs 8:30 – 17:30 · Fri 8:30 – 16:30

Description

The Carmex MTZ carbide thread mill is a through-coolant cutting tool engineered for precise Whitworth BSW and BSF threading in through-holes. It’s built for shops that demand consistent thread quality, reliable chip control, and versatility on machines without external coolant systems.

  • Through-Coolant Flute Design: Internal channels deliver coolant directly to the cutting edge, improving cooling, reducing wear, and enhancing surface finish.
  • Carbide Construction: Rigid, high-precision carbide body enables stable threading at higher speeds and with demanding materials.
  • Whitworth BSW/BSF Thread Forms: Specifically engineered to produce accurate Whitworth thread profiles for standard and fine-pitch applications.
  • MT7 Shank: Morse Taper 7 shank fits a wide range of milling machines for secure retention and smooth tool changes.
  • Through-Hole Thread Milling: Optimized geometry supports threading through holes with direct chip removal, reducing clogging and cycle time.
  • Size and Pitch: Available in 5/8" and 7/8" diameters with 11 threads per inch (11 TPI) to match common Whitworth specifications.

With direct coolant delivery at the cutting edge and an efficient chip-removal strategy, this tool delivers dependable thread quality across materials while minimizing heat buildup. Its through-hole threading capability simplifies setups, eliminates the need for external coolant routing on many machines, and supports reliable, repeatable Whitworth threads in demanding industrial applications.

Part Numbers

Protool Part Number
MTZ12109D2811WMT7
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.

Ask our technical team about this tool

Not sure if this is the right tool for your job? Ask us about speeds and feeds, material suitability, holders or alternatives — 30+ years of machining experience on the other end.

Prefer to talk? Call 01732 887334 — Mon–Thurs 8:30–17:30, Fri 8:30–16:30.

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

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