July 19, 2026
Domestic vs Overseas CNC Machining: Real Cost Compared
A total-landed-cost model for onshore vs offshore CNC machining: tooling, freight, duties, inspection, delay - plus when to stay domestic.
Kiến Thức Sản Xuất CNC Cho Các Chi Tiết Kim Loại Tùy Chỉnh
Đọc các bài viết về sản xuất của Sendot Technology bao gồm gia công CNC, vật liệu, dung sai, hoàn thiện bề mặt, hướng dẫn thiết kế và sản xuất chi tiết tùy chỉnh.
464 articles
July 19, 2026
How to Vet an Overseas CNC Supplier: A 12-Point Checklist
A 12-point checklist to qualify an overseas CNC supplier: the evidence to request, how to verify each claim, and what a bad answer looks like.
July 15, 2026
Laser Cutting vs Punching vs Waterjet for Sheet Metal
Laser cuts most sheet metal fastest, punching wins on repeat holes at volume, waterjet cuts anything cold. Compared on thickness, tolerance, edge and cost.
July 15, 2026
Sheet Metal Bending: Methods, Bend Radius & Springback
How sheet metal bending works — air bending vs bottoming vs coining, minimum bend radius, springback, and the design rules that stop parts cracking.
July 13, 2026
Die Casting Defects: Porosity, Flash & How to Prevent
Die casting defects — porosity, flash, cold shut, misrun, soldering — trace back to venting, temperature and shot pressure. Causes, inspection and fixes.
July 13, 2026
Die Casting vs CNC Machining vs Investment Casting
Die casting wins at volume, CNC machining on tolerance and speed, investment casting on steel and complex shapes. Compared on cost, materials, lead time.
July 11, 2026
Common Injection Molding Defects & How to Fix Them
The most common injection molding defects — sink marks, warping, short shots, flash, flow lines, weld lines, burn marks and voids — with their causes and how to fix them via process, design and material.
July 11, 2026
Injection Molding Design Guide: Walls, Ribs, Bosses & Draft
An injection molding design guide covering wall thickness, ribs, bosses, draft angles, radii and undercuts — the DFM rules that prevent sink, warp and defects and lower tooling cost.
July 11, 2026
Injection Molding Materials: ABS vs PP vs PC vs Nylon
Compare the most common injection molding materials — ABS, PP, PC and nylon (PA) — by strength, flexibility, heat and chemical resistance, cost and typical uses, to pick the right resin.
July 11, 2026
Overmolding vs Insert Molding: Differences & Applications
Overmolding vs insert molding explained: how each process works, the difference between molding around a pre-placed insert and molding a second material over a part, plus applications and materials.
July 9, 2026
Bead Blasting, Sandblasting & Media Finishing Guide
Bead blasting, sandblasting and media finishing explained: how each blasting media changes the surface, the matte texture and Ra they produce, and when to use bead vs sand vs tumbling.
July 9, 2026
Brushing, Graining & Satin Finishes on Metal
Brushed, grained and satin metal finishes explained: how a uniform directional texture is made, the grit and Ra involved, the No. 4 finish, and when to choose it over bead blasting.
July 9, 2026
Metal Polishing & Mirror Finishing Explained
Metal polishing and mirror finishing explained: mechanical polishing, buffing, electropolishing and vibratory finishing — the Ra each achieves, down to a mirror finish (Ra 0.05 µm).
July 9, 2026
Powder Coating vs Wet Paint for Metal Parts
Powder coating vs wet paint compared: coating thickness, durability, color and gloss range, cost, environmental impact, and which to choose for metal parts.
July 7, 2026
Anodizing Types I, II & III: Colors, Specs & When to Use
Anodizing Types I, II and III compared (per MIL-A-8625): chromic, sulfuric and hardcoat anodizing — coating thickness, colors, corrosion and wear resistance, and when to use each.
July 7, 2026
Chromate Conversion Coating (Chem Film / Alodine) Explained
Chromate conversion coating — also called chem film, Alodine or Iridite — explained: what it is, MIL-DTL-5541 types and classes, colors, corrosion resistance, electrical conductivity, and vs anodizing.
July 7, 2026
Electroplating vs Electroless Plating: Which to Choose
Electroplating vs electroless plating compared: how each works, coating uniformity, hardness, cost, and which to choose for complex parts, corrosion resistance, and wear.
July 7, 2026
Passivation of Stainless Steel: Process, ASTM A967 & Benefits
Stainless steel passivation explained: how nitric and citric acid passivation remove free iron and restore the chromium-oxide layer per ASTM A967 — improving corrosion resistance without changing dimensions.
July 5, 2026
CNC Machining Tolerances: Standard Chart & ISO 2768 Guide
CNC machining tolerances explained: the standard default tolerance, an ISO 2768 general-tolerance chart, achievable tolerances by process and material, how to specify them, and their cost impact.
July 5, 2026
DFM for CNC Machining: 12 Rules to Cut Cost & Lead Time
12 practical DFM rules for CNC machining — wall thickness, internal radii, hole and pocket depth, tolerances, threads, undercuts and material choice — that cut cost and lead time without hurting function.
July 5, 2026
GD&T Basics: Symbols, Datums & How to Read Drawings
GD&T basics explained: the 14 geometric tolerancing symbols by category, datums, the feature control frame, and material condition modifiers (MMC/LMC) — how to read an engineering drawing.
July 5, 2026
Surface Roughness (Ra) Chart for Machined Parts
Surface roughness explained: what Ra means, a full Ra chart in micrometres and micro-inches with ISO N grades, typical roughness by process, and how to specify surface finish on a drawing.
July 3, 2026
Aluminum Grades for CNC Machining: 6061 vs 7075 vs 5052 vs 2024
Compare the main CNC aluminum grades — 6061, 7075, 5052 and 2024 — by strength, machinability, corrosion resistance, cost and use. Pick the best aluminum grade for your machined parts.
July 3, 2026
Brass vs Bronze vs Copper: Machinability, Properties & Uses
Brass vs bronze vs copper compared for machined parts: composition, machinability, conductivity, corrosion resistance, strength and cost — plus how to choose the right copper alloy.
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