AYDCDDV304HSS-EX Center Drill Extra Long DV304已售出0個HSS-EX Center Drill Extra Long DV304, the extended center drill whose long shank reaches into deep cavities and hard-to-access spots for accurate center spotting. Diameter 1~5mm, overall length 100~150mm, available in 14 sizes. TiN coating boosts wear resistance and tool life. Works on carbon steel, alloy steel, stainless steel plus aluminum, copper and other non-ferrous metals up to HRC40. French brand, consistent quality.
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Center Spotting Drill
Product Overview: HSS Center Drill Long Length – DV304 Series
【Product Features & Why We Recommend It】
- French Brand Professional Quality: Originating from a professional French cutting tool brand with rigorous quality control — recommended for precision machining users with high demands on deep-layer center positioning accuracy and tool consistency.
- Extended Length Deep-Layer Positioning Solution: Features a specially extended design with overall length spanning 100–150mm — providing greater reach than the standard DV301 model, recommended for center positioning in deep cavities, deep-cavity structures, or fixture interference situations where standard length tools cannot reach, effectively resolving deep-layer hole spotting challenges.
- HSS-EX High-Performance Substrate: Manufactured with HSS-EX ultra-high-performance high-speed steel, delivering superior hardness and wear resistance compared to standard high-speed steel — recommended for applications requiring long-duration stable deep-layer center drilling operations.
- TiN Coating Enhancement: The surface is treated with TiN coating, providing good wear resistance and heat resistance — recommended for deep-layer center positioning across carbon steel, alloy steel, stainless steel, and non-ferrous metals, effectively extending tool service life.
- 14 Specification Full Coverage: Available in diameter 1–5mm, flute length 1–5.5mm, and overall length 100–150mm across 14 specifications — recommended for flexible selection based on workpiece depth and hole diameter requirements.
【Machining Applications & Uses】
- Primary Use: Pre-drilling center positioning in deep cavities, extended-reach spot drilling for deflection prevention, and deep-layer precision hole location marking.
- Recommended Work Materials:
- P-Class (Carbon Steel / Alloy Steel): Structural steel, carbon steel, and alloy steel — recommended for hardness below HRC40, where HSS-EX combined with TiN coating delivers stable deep-layer center positioning cutting performance.
- M-Class (Stainless Steel): SUS304, SUS316, and other high-toughness stainless steel — the TiN coating effectively suppresses adhesion and maintains deep-layer positioning accuracy.
- N-Class (Non-Ferrous Metals): Aluminum alloys, pure copper, brass, and other non-ferrous metals — the HSS-EX substrate combined with TiN coating ensures stability and surface quality during deep-layer center positioning of soft materials.
