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

Carmex Thread Turning Internal Insert - NPTF - Right Hand - 11IRB18NPTFBMA

Carmex Thread Turning Internal Insert - NPTF - Right Hand - 11IRB18NPTFBMA

SKU:11IRB18NPTFBMA

The Carmex Thread Turning Internal Insert – NPTF – Right Hand – 11IRB18NPTFBMA is a precision cutting insert designed for internal threading tasks. Part of Carmex's trusted family of laydown tria... Read more ↓
P
M
K
S
H
Thread TypeInternal
Thread DirectionRight Hand
Thread FormNPTF
Pitch18
View all specifications ↓
Download Cutting Data
£9.30
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 Turning Internal Insert – NPTF – Right Hand – 11IRB18NPTFBMA is a precision cutting insert designed for internal threading tasks. Part of Carmex's trusted family of laydown triangular inserts, it's built to handle a wide range of thread standards, including the NPTF right-hand threads common in piping and hydraulic components. Ideal for engineers, machinists, and maintenance technicians, it delivers consistent results with minimal setup.

Designed for reliability and versatility, it helps you tackle both simple and demanding threading jobs with a single tool family. Its laydown triangular geometry promotes stable cutting, smooth chip control, and consistent thread profiles across a wide range of materials and production runs.

  • Broad thread compatibility: Covers a broad range of thread standards, including NPTF right-hand threads, helping you complete more jobs with a single insert family and reducing tool changes.
  • Laydown triangular geometry for stable cutting: Three cutting edges and a compact geometry provide stable engagement, reduce chatter, and deliver clean, consistent internal threads across materials.
  • Built for reliability across basic to demanding applications: Crafted to perform under varying conditions, delivering dependable results and longer tool life with less downtime.

When you choose this Carmex internal insert, you’re equipping your operation with a versatile, repeatable threading solution. It streamlines setup, reduces tool-change frequency, and helps you produce accurate, high-quality internal threads faster. Across a busy workshop or a precision-focused production line, this insert supports tighter tolerances, smoother finishes, and improved overall throughput.

Part Numbers

Protool Part Number
11IRB18NPTFBMA
Brand
Carmex
Category
Thread Turning
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.

Complete Your Project

Tooling and consumables that work with this product.
All 6 →