Carmex Internal UN Threadmill Insert 21mm/ 12 TPI

SKU: 21I12UNMT7

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Sale price$125.57

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Only 2 units left

Description

Mill-Thread Insert – UN 12 TPI, Internal

The 21 I 12 UN MT7 Mill-Thread Insert is engineered for internal threading of Unified National (UN) profiles using CNC milling machines and helical interpolation. With a thread pitch of 12 TPI, this insert is ideal for creating accurate, durable threads in mechanical and general-purpose applications. Its larger insert size of 21, combined with a 12 mm height and 4.7 mm thickness, offers enhanced stability and cutting strength for deeper threading operations.

Constructed from high-grade MT7 carbide, the insert provides excellent wear resistance and long tool life, making it suitable for both short runs and high-volume production. It is designed to be used with Carmex’s SR series toolholders, enabling reliable clamping, efficient chip evacuation, and support for internal coolant delivery where needed.

Key Features:

  • Ordering Code: 21 I 12 UN MT7
  • Thread Type: Internal Threading
  • Thread Profile: UN – Unified National
  • Pitch (TPI): 12
  • Insert Size: 21
  • H (Height): 12 mm
  • T (Thickness): 4.7 mm
  • Carbide Grade: MT7
  • Insert Type: Internal-use only
  • Applications: Unified internal threads for mechanical and general-purpose use
  • Key Advantage: Ideal for deeper and more robust threading, with SR series toolholder compatibility

Carmex Precision Tools Ltd. is globally recognized for its advanced threading solutions. The company offers a full range of Thread Turning inserts, Mill-Thread tools, Spiral Mill-Thread, Solid Carbide threadmills, and matching SR Series Toolholders ensuring full compatibility and performance from toolholder to insert.

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