Carmex Internal CMT Vertical Threadmill Insert UN 17.8mm/ 12 TPI

SKU: C18 I 12 UN MT7

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Sale price$178.20

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Description

CMT Vertical Milling Tool – C18 Insert, Internal Threading for Full Profile UN Threads

The CMT C18 Vertical Milling Tool is designed for precise internal thread milling of Unified National (UN) full-profile threads. Built to use C18 inserts, this tool is ideal for producing high-quality threads in nominal sizes such as 7/8". Featuring a cutting diameter of 17.8 mm, it ensures optimal chip control and clean, consistent thread formation in deep or difficult-to-reach bores.

The tool utilizes MT7 carbide grade, a titanium aluminum nitride multi-layer coating (ISO K10–K20), for high wear resistance, thermal stability, and surface finish. Designed with internal coolant capabilities and a robust clamping system, it provides excellent repeatability and tool life during demanding CNC operations.

Key Features:

  • Ordering code: C18I12UNMT7
  • Tool Type: CMT Vertical Milling – Internal Threading
  • Insert Type: C18
  • Thread Specification:
    • Nominal Size: 7/8"
    • UNF: 1, 1⅛
  • Cutting Diameter (D): 17.8 mm
  • Number of Teeth: 2
  • Pitch: 12 TPI (≈ 1.5 mm)
  • Carbide Grade: MT7
  • Coolant: Internal coolant bore
  • Clamping: High-accuracy solid clamp system
  • Compatibility: Right- and left-hand thread milling
  • Holder Code: H5.1, 5.2, 6, 7, 8, 9, 21, 22, 23

Carmex Precision Tools Ltd. is a leading manufacturer of high-quality cutting tools. Carmex specializes in the production of threading tools for turning and milling. The product lines include Thread Turning inserts and toolholders, Mill Thread inserts and tool holders, Mill-Thread Solid Carbide, and Spiral Mill Thread—offering complete solutions for advanced CNC threading and grooving applications.

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