T34456 Harlingen® Carbide Threading Insert & Tool Holder Set, 3/4"

Complete solution for precise external and internal threading on your metal lathe.

This professional-grade set makes threading operations faster and more precise. With 3/4" shank holders, titanium aluminum nitride-coated (TiAlN) indexable inserts, and durable tool bodies, it's built for rigidity, accuracy, and repeatable results—ideal for demanding lathe work where clean thread profiles and minimal setup time matter most. This set provides everything you need to accurately cut common thread forms on both the outer diameter (OD) and inner diameter (ID) of a workpiece.

FEATURES and BENEFITS:

• Dual-Purpose Threading: Includes both an external threading tool holder and a matching internal threading boring bar. This versatility allows you to cut threads on bolts, shafts, and inside bored holes without changing your setup.
  • External holder: SER0750K16 (3/4" square shank)
  • Internal boring bar: SIR0750P16 (3/4" round shank)
• Comprehensive 60° Thread Profiles: The included inserts feature a 60° profile, making them suitable for cutting common thread standards, including metric (M) and unified national (UN/UNC/UNF). This set provides four specialized inserts to cover all needs:
  • External (E) vs. internal (N): The set includes both external (16ER) and internal (16NR) inserts to match the OD and ID holders.
  • Partial profile (A60): The 16ERA60 and 16NRA60 inserts are partial profile cutters, which are general-purpose and suitable for a wide range of thread pitches.
  • Full profile (G60): The 16ERG60 and 16NRG60 inserts are full profile cutters, meaning they cut the entire thread form (flanks, crest, and root) to ensure the highest precision on the final thread geometry.
• TiAlN-Coated Performance: All carbide inserts are coated with TiAlN. This advanced coating provides exceptional hot hardness and thermal stability, resulting in superior wear resistance, reduced friction, and longer tool life during demanding threading cycles.
• Quick Indexable System: Indexable inserts eliminate the need for sharpening, ensure repeatable tool positioning, and drastically reduce tool change downtime.
• Durable Construction: The square external holder provides superior stability for heavy external cuts, while the round internal bar offers maximum flexibility and adjustability within a boring bar holder. Both tool bodies feature a durable satin chrome finish to inhibit rust and corrosion.
• Complete Kit: The set includes a Torx® T-15 key for fast and secure insert mounting.

SPECIFICATIONS:

• Tool type: Indexable threading set
• Shank size: 3/4" Square (external holder), 3/4" round (internal bar)
• Included holders:
  • SER0750K16 (external threading)
  • SIR0750P16 (internal threading/boring bar)
• Insert types: 16ERA60, 16NRA60, 16NRG60, 16ERG60
• Thread profile: 60 Degrees (metric/UN standard)
• Insert coating: TiAlN
• Tool body finish: Satin chrome
• Quantity: 2 Tool holders, 4 inserts, 1 Torx® key

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