Threading Carbide Insert Blades are designed for turning 55° Whitworth (BSW/BSF/BSP) external threads, fully compliant with BS 84 and GB/T 7307 standards. Available in both right-hand (ER) and left-hand (EL) configurations, they cover a wide range of TPI/pitch specifications to meet industrial thread requirements for pipe fittings, fasteners, and mechanical components.
Technical Specifications
Key Features & Advantages
Full Compliance with 55° Whitworth Thread Standards
Engineered for BS 84 British Standard Whitworth threads and GB/T 7307 55° parallel pipe threads, ensuring accurate thread profile, pitch, and form tolerance for pressure-tight connections.
Full-profile geometry cuts the thread root and crest in one pass, eliminating secondary operations and ensuring consistent thread quality.
Comprehensive Size & Pitch Coverage
Insert sizes: 11, 16, 22, 27 (IC: 6.35 / 9.525 / 12.7 / 15.875 mm)
Pitch range: 2.5–28 TPI (0.5–1.4 mm pitch), covering common Whitworth/BSP thread specifications
Both right-hand (ER) and left-hand (EL) configurations for external thread turning
Multi-Grade & Coating Options for Versatile Machining
DM215 (Stainless Steel Grade): Balanced toughness and wear resistance for stainless steel, alloy steel, and heat-resistant alloys.
DM415 (Steel Grade): Optimized for carbon steel and structural steel, offering high stability in continuous cuts.
DP220 (Cast Iron Grade): High thermal stability and chipping resistance for cast iron and grey iron machining.
DK110 (Non-Ferrous Grade): Low-friction substrate for aluminum, copper, and other non-ferrous metals to prevent built-up edge.
Uncoated and coated (TiN/TiAlN) options available for enhanced surface finish and extended tool life.
High-Precision Manufacturing & Durability
Ultra-fine grain carbide substrate with balanced hardness and toughness, resisting chipping in both continuous and interrupted cuts.
Precision-ground cutting edges ensure consistent thread pitch accuracy and surface finish, meeting tight tolerance requirements for industrial applications.
Standard center mounting hole design fits most common external threading tool holders (SER/L, SEL/L) for CNC lathes and turn-mill centers.
Usage & Selection Guidelines
Grade Selection
Choose DM215 for stainless steel and high-alloy materials.
Select DM415 for carbon steel and structural steel applications.
Use DP220 for cast iron and DK110 for non-ferrous metals like aluminum.
Pitch Matching
Ensure the insert TPI matches the workpiece thread pitch to avoid profile errors.
Tool Holder Compatibility
Pair with standard SER/SEL tool holders matching the insert size (e.g., 16ER inserts with 16mm tool holders).
Machining Tips
Use appropriate cutting fluids (EP fluids for steel, dedicated fluids for aluminum) to reduce wear and improve surface finish
After-Sales & Customization
Full dimensional and quality inspection before shipment, with defective product replacement support.
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Bulk order customization available for special pitches, coatings, and thread forms.
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Free technical support for cutting parameter optimization and grade selection.
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Most common specifications are kept in stock for fast delivery (marked ● in the catalog)
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