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Carmex Vertical Milling CMT Three Flute Insert - Threading - C18I20UNMT7

SKU:C18I20UNMT7

The Carmex Vertical Milling CMT Three Flute Insert - Threading (C18I20UNMT7) is a versatile vertical milling insert designed for threading, grooves, and chamfers. When paired with Carmex vertical... Read more ↓
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M
K
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ApplicationThreading
Thread FormUN
Internal or ExternalInternal
Insert Diameter17.8
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£41.92
Prices shown ex. VAT
In Stock— only 1 left
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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 Vertical Milling CMT Three Flute Insert - Threading (C18I20UNMT7) is a versatile vertical milling insert designed for threading, grooves, and chamfers. When paired with Carmex vertical milling indexable inserts and tool holders, it handles a wide range of precision milling tasks with reliable, repeatable results.

Its ground profile delivers high precision and excellent performance, even under demanding cutting conditions. This design supports high machining parameters while maintaining a high-quality surface finish, and the solid, accurate clamping method enables full repeatability. The same insert works for right-hand or left-hand threads, simplifying setup and inventory. Toolholders come with a Weldon shank and coolant bore, and chamfer inserts are available to complete finishing tasks.

  • Precision-ground profile for consistent threading: Delivers accurate thread geometry and reliable surface quality across production runs.
  • High-parameter performance with superior surface finish: Optimized for aggressive cutting parameters while preserving finish quality and part accuracy.
  • Universal threading with reliable clamping: One insert works for both right- and left-hand threads, with solid clamping; toolholders include Weldon shank and coolant bore, and chamfer inserts are available for finishing tasks.

This threading-focused insert provides a dependable, efficient solution for machining shops aiming to improve throughput, reduce setup time, and achieve consistent, high-quality threaded features on a variety of materials.

Part Numbers

Protool Part Number
C18I20UNMT7
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 Vertical Milling CMT Multi Flute Inserts - Threading - UN

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You are viewing C18I20UNMT7. Click any other SKU to view its full details.

Product SKUInsert SizePitchPriceStock Order
C10I13UNMT7 1013£33.36 In Stock
C25I8UNMT7 258£47.16 In Stock
C18I12UNMT7 17.812£41.92 5 days
C25I4UNMT7 254£47.16 In Stock
C18I8UNMT7 17.88£41.92 In Stock
C18I32UNMT7 17.832£45.76 In Stock
C18I20UNMT7 Viewing17.820£41.92 In Stock
C18I16UNMT7 17.816£41.92 5 days
C18I14UNMT7 17.814£41.92 5 days
C12I32UNMT7 1232£37.36 In Stock
C12I24UNMT7 1224£33.76 5 days
C12I20UNMT7 1220£33.76 In Stock
C12I18UNMT7 1218£33.76 5 days
C12I11UNMT7 1211£33.76 In Stock
C12I10UNMT7 1210£33.76 In Stock
C25I7UNMT7 257£47.16 5 days
C25I6UNMT7 256£47.16 5 days
C25I5UNMT7 255£47.16 5 days
C18I9UNMT7 17.89£41.92 5 days
C18I28UNMT7 17.828£41.92 In Stock
C18I24UNMT7 17.824£41.92 In Stock
C18I18UNMT7 17.818£41.92 In Stock
C18I11UNMT7 17.811£41.92 In Stock
C12I28UNMT7 1228£33.76 In Stock
C12I16UNMT7 1216£33.76 5 days
C12I12UNMT7 12.412£33.76 In Stock
C10I20UNMT7 1020£33.36 5 days
C10I18UNMT7 1018£33.36 In Stock
C10I12UNMT7 1012£33.36 In Stock

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