Please log in here to access all benefits, including promotional discounts and faster checkouts.

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 ↓
P
M
K
N
S
Thread FormWhitworth BSW BSF
Size5/8 7/8
Pitch11
Diameter (D)11.8
View all specifications ↓
Download Cutting Data
£183.59
Prices shown ex. VAT
5 days estimated lead time — subject to availability
View Other Sizes →
Free delivery over £50 ex VAT
Secure checkout
14-day returns
30+ years expertise
Klarna
Pay in 3 interest-free instalments. No extra cost if paid on time. 18+ only.
Learn more about Klarna
Speak to our team
01732 887334
Mon – Thurs 8:30 – 17:30 · Fri 8:30 – 16:30

Description

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.

Part Numbers

Protool Part Number
MTB12118E3311WMT7
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 Through Coolant (MTB)

View full collection →

You are viewing MTB12118E3311WMT7. Click any other SKU to view its full details.

Product SKUSizePitchFlute LengthReachShank DiameterOverall LengthPriceStock Order
MTB06046C1320WMT7 1/42013.313.3658£95.48 5 days
MTB06056C1618WMT7 5/161816.216.2658£95.48 5 days
MTB08076D1920WMT7 3/82019.719.7864£127.18 5 days
MTB0807D1916WMT7 3/81619.819.8864£127.18 5 days
MTB0808D2214WMT7 7/161422.722.7864£127.18 5 days
MTB10088D2318WMT7 7/161823.323.31073£146.70 5 days
MTB1009D2612WMT7 1/2 - 9/16 3/4 - 13/161226.526.51073£146.70 5 days
MTB1010E2616WMT7 1/2 - 9/161626.126.11073£146.70 5 days
MTB12118E3311WMT7 Viewing5/8 7/81133.533.51284£183.59 5 days
MTB14128E3114WMT7 5/8 - 11/161431.831.81483£204.20 5 days
MTB1616E439WMT7 Standard + CoolantWhitworth BSW BSF7/8 1 1/8943.743.7£259.88 5 days

Other sizes in this range

with tools we think you'll like
All 11 →