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Carmex Thread Mills Solid Carbide - With Through Coolant - Whitworth BSW BSF - 1/4 x 20 - MT7
| Thread Form | Whitworth BSW BSF |
| Size | 1/4 |
| Pitch | 20 |
| Diameter (D) | 4.6 |
| Flute Length (l) | 13.3 |
| Shank Diameter (d) | 6 |
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Meet the Carmex Thread Mills Solid Carbide with Through Coolant — a high-precision internal threading solution engineered for Whitworth forms. Designed for MT7 spindles, this tool delivers reliable 1/4 x 20 threads with enhanced cooling directly through the bore for smoother, more consistent machining.
- Through coolant bore: Coolant is delivered through the tool bore to the cutting edge, improving chip evacuation and keeping the thread path clear.
- Solid carbide construction: Hardened carbide for excellent wear resistance and long tool life in demanding threading applications.
- Whitworth thread form: Specifically designed for Whitworth BSW/BSF threads to ensure accurate profile and pitch in 1/4 x 20 applications.
- Size and interface: 1/4" diameter with 20 TPI, mounted on MT7 shanks for compatibility with a wide range of CNC machines.
- Internal thread milling capability: Optimized geometry for clean, precise internal threads with reduced risk of chatter or burrs.
The MTB line’s through-coolant feature not only aids chip control but also cools the cutting zones, extending tool life and enabling more aggressive cutting strategies. This makes it a practical choice for production environments where consistent thread quality and reduced downtime matter. Whether you're working on fasteners, housings, or any component requiring accurate Whitworth threads, this Carmex thread mill offers dependable performance and integration with your MT7 tooling ecosystem.
| Thread Form | Whitworth BSW BSF |
| Size | 1/4 |
| Pitch | 20 |
| Diameter (D) | 4.6 |
| Flute Length (l) | 13.3 |
| Shank Diameter (d) | 6 |
| No of Flutes | 3 |
| Overall Length (L) | 58 |
| 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.
Full Range: Carmex Solid Carbide Thread Mills - Whitworth - With Through Coolant (MTB)
View full collection →You are viewing MTB06046C1320WMT7. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Flute Length | Reach | Shank Diameter | Overall Length | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|---|
| MTB06046C1320WMT7 Viewing | 1/4 | 20 | 13.3 | 13.3 | 6 | 58 | £95.48 | 5 days | |
| MTB06056C1618WMT7 | 5/16 | 18 | 16.2 | 16.2 | 6 | 58 | £95.48 | 5 days | |
| MTB08076D1920WMT7 | 3/8 | 20 | 19.7 | 19.7 | 8 | 64 | £127.18 | 5 days | |
| MTB0807D1916WMT7 | 3/8 | 16 | 19.8 | 19.8 | 8 | 64 | £127.18 | 5 days | |
| MTB0808D2214WMT7 | 7/16 | 14 | 22.7 | 22.7 | 8 | 64 | £127.18 | 5 days | |
| MTB10088D2318WMT7 | 7/16 | 18 | 23.3 | 23.3 | 10 | 73 | £146.70 | 5 days | |
| MTB1009D2612WMT7 | 1/2 - 9/16 3/4 - 13/16 | 12 | 26.5 | 26.5 | 10 | 73 | £146.70 | 5 days | |
| MTB1010E2616WMT7 | 1/2 - 9/16 | 16 | 26.1 | 26.1 | 10 | 73 | £146.70 | 5 days | |
| MTB12118E3311WMT7 | 5/8 7/8 | 11 | 33.5 | 33.5 | 12 | 84 | £183.59 | 5 days | |
| MTB14128E3114WMT7 | 5/8 - 11/16 | 14 | 31.8 | 31.8 | 14 | 83 | £204.20 | 5 days | |
| MTB1616E439WMT7 | Standard + Coolant | Whitworth BSW BSF | 7/8 1 1/8 | 9 | 43.7 | 43.7 | £259.88 | 5 days |
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