Indexable Carbide Threading Inserts for CNC Internal Turning Tools M12-M30 Metric Threads

Descrizione

What Are Carbide Threading Inserts?

Carbide threading inserts are precision cutting tools made from tungsten carbide, designed for creating high-accuracy internal or external threads in metals, plastics, and composites. They replace traditional taps and dies, offering superior wear resistance and thread quality in CNC machining and mass production.

Carbide Threading Inserts: Specifications

1. Material

• Micrograin Tungsten Carbide (K10/K20): 90-94 HRA hardness for steel/iron

• Submicron Carbide (Ultra-Fine Grain): For aerospace alloys (Ti, Inconel)

• Coated Carbide (TiAlN/AlCrN): 3X tool life vs. uncoated

2. Surface Treatment

• PVD Coating (TiN/TiCN): Reduces friction, resists built-up edge

• CVD Diamond Coating: For abrasive composites (CFRP, ceramics)

• Laser-Textured Flutes: Chip evacuation optimization

3. Common Specifications

• Thread Standards: Metric (M1–M30), UNC/UNF (#0–1″), NPT/BSPT

• Insert Geometry: Full-profile, partial-profile, multi-tooth

• Tolerance Class: 4H/6H (internal), 4g/6g (external)

• Coolant Compatibility: Through-coolant designs available

4. Applications

• Automotive: High-volume engine block threading

• Aerospace: CRES & titanium fastener holes

• Oil & Gas: API threads on drill collars

• Medical: Micro-threads in bone screws

Excellent Case: EV Motor Housing Production

Challenge:
An EV manufacturer struggled with tap breakage when threading 500+ aluminum motor housings daily. Conventional HSS taps lasted only 200 holes before chipping.

Solution:

• Deployed TiAlN-coated carbide inserts (M8x1.25 full-profile):

  • Speed: 80 m/min cutting vs. 20 m/min with HSS

  • Tool Life: 5,000+ holes per edge (25X improvement)

  • Surface Finish: Ra 0.8μm, eliminating secondary polishing

Results:

• Reduced threading cost per unit by 62%

• Achieved ±0.02mm pitch diameter consistency

• Enabled lights-out production with automated tool changers

Key Advantages

✔ Thread Quality – Maintains ISO 965 class 6H tolerance after 10K cycles
✔ Versatility – Interchangeable inserts for left/right-hand threads
✔ Cost Savings – Indexable design uses all cutting edges