Surface finish defines the fine texture left after CNC machining and directly affects part quality, wear resistance, and fit. This article explains what surface finish is, how it’s measured (Ra, Rz, RMS), and how different roughness levels influence function and cost.
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When specifying brass for CNC machining, engineers must choose between H59 and H62—two widely used Chinese grades (GB/T 5231). The choice significantly affects machinability, corrosion resistance, and cost. Since direct "international equivalents" are unreliable due to variations in lead and alloying additions, this guide provides an essential, engineering-focused comparison to help you specify the right material based on composition, chip formation, and application needs.
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Copper is a fundamental industrial metal known for its excellent electrical and thermal conductivity, corrosion resistance, and machinability. This guide explains what copper is, its composition and characteristics, how it’s produced, the main types and alloys, and why it remains essential for precision machining and modern manufacturing.
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Stainless steel is a chromium-based alloy known for its exceptional corrosion resistance, strength, and versatility. Produced through controlled melting and refining, it offers excellent mechanical and physical properties, making it essential for industrial, architectural, medical, and everyday applications.
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Brass (Copper-Zinc) is preferred for its low cost and excellent machinability, ideal for general and decorative parts. Its main weakness is lower strength and corrosion resistance. Bronze (Copper-Tin) is chosen for superior strength, hardness, and durability, especially in marine and heavy-load applications (bearings, gears), despite being significantly more expensive and harder to manufacture.
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Laser cutting is a high-precision manufacturing process that uses a focused laser beam to melt or vaporize material along a defined path. It delivers exceptional accuracy, edge quality, and processing speed across metals and non-metals, making it one of the most efficient methods for modern sheet fabrication and component production.
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Titanium offers top strength-to-weight and corrosion resistance but machines poorly due to low thermal conductivity, chemical reactivity, and low modulus—driving heat, wear, and chatter. The stable recipe is low cutting speed (Ti-6Al-4V roughing ≈ 40–60 m/min) with higher feed to make thick chips, plus high-pressure through-coolant (70–100 bar), rigid workholding, and PVD-coated fine-grain carbide. Use low radial / high axial engagement and constant-engagement HEM toolpaths to achieve predictable tool life, tight tolerances, and clean finishes.
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Copper machining is the precision CNC processing of pure copper and alloys to produce high-conductivity and thermal-efficient parts. With optimized tooling and parameters, it achieves tight tolerances and smooth Ra 1.6 µm finishes for electrical, heat-transfer, and vacuum components.
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In the field of CNC precision machining, knurling is a special process that goes beyond simple cutting. It is a critical surface finishing technique used to form complex texture patterns on rotating metal workpieces. These patterns are primarily used to enhance grip, provide anti-slip functions, or create a unique surface texture for functional components. Knurling…
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A definitive professional guide to thread taps for engineers. This article details 12 core tap types (cutting vs. forming) and provides drill size charts based on the critical 75% engagement rule for torque safety. Learn to select ISO 6H/UN 3B tolerances based on assembly needs, and utilize systemized troubleshooting for tap breakage and quality control.
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