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Carmex Carbide Threading Insert - ACME - TiAlN Coated - 40I3.5ACME

SKU:40I3.5ACME

The Carmex Carbide Threading Insert for ACME threads is a versatile, TiAlN-coated carbide solution designed for machinists who demand reliable, repeatable threading performance across multiple pro... Read more ↓
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M
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ApplicationThreading
Thread FormACME
Internal or ExternalInternal
Insert Size40
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£90.25
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
Klarna
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01732 887334
Mon – Thurs 8:30 – 17:30 · Fri 8:30 – 16:30

Description

The Carmex Carbide Threading Insert for ACME threads is a versatile, TiAlN-coated carbide solution designed for machinists who demand reliable, repeatable threading performance across multiple profiles. With five length options and broad pitch coverage, it streamlines tool selection and setup in production or job-shop environments.

  • Five length options: Available in lengths from 12 mm to 40 mm to fit different thread forms and lead depths.
  • Broad pitch range: Supports pitches from 0.5 mm (32 TPI) up to 6.0 mm (4 TPI).
  • Double-sided cutting edges: Each insert offers two usable cutting edges to maximize life (except for BSPT/NPT/NPTF/American Buttress/API RD).
  • Internal & external threading (where applicable): For many thread profiles, the same insert can machine both internal and external threads; some profiles require dedicated inserts (ISO/UN/UNS, etc.).
  • TiAlN coating: Titanium aluminium nitride coating delivers enhanced hardness, wear resistance, and heat tolerance for longer tool life and consistent finishes.

This insert is built to improve reliability and efficiency in threaded part production. By covering a wide range of profiles with a single, TiAlN-coated carbide tool, you can reduce changeovers, lower tool inventory, and achieve consistent thread quality across batches. The two-edge design and robust coating help maintain sharpness during high-feed operations on common workpiece materials, while the compact geometry fits standard threading tools. Ideal for job shops, production lines, and maintenance environments that routinely produce ACME or other common thread forms.

Part Numbers

Protool Part Number
40I3.5ACME
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 Carbide Threading Inserts - ACME - TiAlN Coated

View full collection →

You are viewing 40I3.5ACME. Click any other SKU to view its full details.

Product SKUInsert SizePitchPriceStock Order
21I10ACME 2110£49.50 5 days
21I12ACME 2112£49.50 5 days
21I8ACME 218£49.50 In Stock
30I10ACME 3010£52.20 5 days
30I12ACME 3012£52.20 5 days
30I4ACME 304£67.95 In Stock
30I5ACME 305£52.20 In Stock
30I6ACME 306£52.20 In Stock
30I8ACME 308£52.20 5 days
40I3.5ACME Viewing403.5£90.25 5 days
40I3ACME 403£90.25 5 days
40I4ACME 404£90.25 5 days

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