D4 Micro-Diameter Cutting Tap – Ultra-Precision Small Diameter Threading Tool
Bullet Points
Solid Tungsten Carbide Material — Submicron-grain YG6X / YG8X grades, HRA 90-92 hardness, red hardness below 1,000°C; tapping life is 3-5x longer than HSS-E.
5-Axis CNC One-Shot Precision Grinding — Edge symmetry ±0.003 mm; superior edge sharpness and dimensional stability vs. HSS taps.
Brittleness-Optimized Edge Geometry — Chamfered relief + stress-balanced chip-breaker slot; chipping rate is 50% lower than conventional carbide taps.
Full Coverage of Three Flute Types — Spiral / straight / forming taps; full M1-M1.6 range from a single vendor — reduces multi-supplier inquiry.
Top-Tier PVD / CVD Coating Options — TiAlN / CrAlN / DLC nano-coatings perform stably across dry, wet, and MQL conditions; DLC delivers 5x longer life on non-ferrous metals.
23 Years of Cutting Tool Expertise + ISO 9001 / SGS Certified — Mill test and hardness reports supplied per batch; trusted by major overseas buyers.
Flexible OEM / ODM — Drawing- or sample-based customization; MOQ 500 pcs; 25-35 day lead time; reduces inventory pressure.
Factory Direct with 12-Month Warranty — Higher unit cost offset by 3-5x longer life — lower total cost than HSS-E; Trade Assurance supported; free replacement for non-human defects within 12 months.
Applications
Electronics: Micro-components in circuit boards, connectors, sensors and precision connectors.
Medical Devices: Surgical instruments, implants, minimally invasive equipment and high-precision medical parts.
Automotive & Aerospace: Fuel injection systems, turbine blades, high-tolerance engine and hydraulic components.
Precision Manufacturing: Watch parts, micro-mechanisms, optical components and small hardware threading.
Hot Q&A
- What is the smallest tap you can make? Can you produce one with a diameter smaller than D4?
Answer: Our minimum diameter can go down to D0.6 / D0.8 / D1, with full micro-diameter customization available. D4 is a standard stocked size with the fastest lead time.
- What machine parameters are recommended for D4 tungsten steel taps? How should speed and feed be set?
Answer: Carbide taps support much higher speeds. We recommend CNC spindle 2,000-3,500 rpm (2-3x faster than HSS) with feed 0.05-0.20 mm/rev; MQL minimum-quantity lubrication is optimal.
- Can tungsten carbide taps solve the problem of easy chipping when tapping hardened steel, stainless steel, and titanium alloy?
Answer: Tungsten carbide HRA 90-92 + TiAlN or DLC coating enables 1,500+ hole tapping in 304/316 stainless steel; hardened steel above HRC 55 can be tapped in one setup; edges are optimized for carbide brittleness.
- How to choose spiral grooves, straight grooves and extrusion taps?
Answer: Choose spiral flute for through holes (smooth chip evacuation); straight flute for blind holes (larger chip space); forming taps for thin plates / ductile materials (chipless tapping, +30% thread strength).
