PVD Coated GM3225 Carbide Threading Insert for Multi-TPI Whitworth Internal Threading on CNC Lathes

Universal AG55 55° Partial Whitworth Thread 16IRAG55 TC GM3225 PVD Coated Internal Thread Insert Multi-TPI for Carbon Steel Stainless Steel CNC Inner Hole Machining

Product Overview

The 16IRAG55 TC GM3225 is premium multilayer PVD-coated carbide universal internal threading insert manufactured by TC for CNC imperial inner bore thread turning. Adopting universal partial-profile 55° AG55 Whitworth thread geometry and TC exclusive fine-grain GM3225 carbide grade, this insert features excellent toughness, reliable wear and chipping resistance to retain stable cutting performance in continuous and interrupted internal threading operations.

Specially engineered for multi-TPI general-purpose 55° Whitworth internal thread machining, it ensures precise thread contour formation, controllable chip evacuation and prolonged service life for diversified batch internal threading on general CNC lathes and automatic turning equipment.

Key Features

• GM3225 fine-grain carbide substrate with multilayer PVD coating balances high toughness and abrasion resistance, well suited for high-temperature cutting of stainless steel and alloyed metal materials.
• Universal partial 55° AG55 Whitworth thread profile compatible with multiple common imperial TPI specifications to reduce spare insert inventory cost.
• Standard 16IR internal insert structure with optimized clearance, easy clamping and stable installation on matching 16IR-series internal threading tool holders.
• Precision-ground cutting edge delivers superior thread surface finish and effectively lowers burr generation after machining.
• Reinforced cutting edge inhibits built-up edge accumulation during long-cycle continuous production and extends overall insert service lifespan.

Workpiece Materials

• Carbon steel
• Alloy steel
• Austenitic stainless steel
• Heat-resistant superalloy
• Pre-hardened structural steel

Typical Applications

• Universal multi-TPI 55° Whitworth internal thread turning
• CNC lathe inner bore imperial threading
• Semi-finish precision thread machining
• Interrupted-cut internal thread production
• Mixed-spec diversified batch Whitworth thread processing

Technical Specifications

Why Choose 16IRAG55 TC GM3225?

Combining TC’s proven GM3225 coated carbide substrate and versatile AG55 universal 55° Whitworth thread geometry, the 16IRAG55 maintains steady cutting stability and uniform thread accuracy during steel and stainless steel threading. Its wide multi-TPI compatibility cuts down tool stocking quantity and shortens production setup time, lifting overall workshop machining efficiency and serving as an economical universal threading insert for mixed-spec internal Whitworth thread batch production.