Engineering articles, manufacturing guides, standards, testing methods and project cases from EPOC CRAFTER.

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Materials & Properties

71 articles

Aluminum & Aluminum Alloys

• Laser Cutting Aluminum: Alloys, Assist Gas, Cut Quality and TolerancesOct 16, 2026
• Aluminum for CNC Machining: How to Choose Grades, Tempers, Stock Forms, Finishes and CostSep 23, 2026
• Bead Blasting Aluminum: How to Choose Glass Bead, Steel Shot, or Aluminum OxideSep 10, 2026
• Sheet Metal Materials Guide (2026): 5052 vs 6061 Aluminum, 304 Stainless, 1018 Steel, and Galvanized SteelAug 26, 2026
• Anodizing vs. Electroless Nickel vs. E-Coat vs. Powder Coat: Choosing the Right Finish for Machined AluminumAug 12, 2026
• Aluminum Anodizing Guide: How to Choose the Right Type, Thickness, and Finish for CNC Machined PartsAug 12, 2026
• Anodizing Thickness, Color Consistency, and Corrosion Resistance: How the Three Are Connected for 6061 PartsAug 6, 2026
• Machining 6061 for Anodize: Pre-Anodize Dimensions, Surface Finish, and Masking Decisions (2026)Jul 23, 2026
• 6061-T6 vs T651 vs T6511: Which Temper to Order for Machined PartsJul 22, 2026
• 6061 vs 7075 Aluminum: Strength, Cost, and Machinability Compared (with Selection Rules)Jul 19, 2026
• 6061 Aluminum: Properties, Grades, and How to Choose the Right Variant for CNC PartsJul 16, 2026

Steel, Metals & Alloys

• Welding 4130 Chromoly: Material Condition, HAZ and Finish MachiningOct 24, 2026
• What Is Stainless Steel? Grades, Properties, CNC Machining, Corrosion and FinishingOct 15, 2026
• Types of Bronze for Bushings, Gears and Wear Parts: Grades, Properties and MachiningOct 14, 2026
• Tantalum Machining: Properties, Grades, Corrosion Resistance and Manufacturing ChallengesOct 12, 2026
• Nickel and Nickel Alloys for Machining: Corrosion, Heat, Work Hardening and ToolingOct 2, 2026
• Ferrous Metals for Manufacturing: Steel, Cast Iron, Machinability and SelectionSep 29, 2026
• What Is Copper? C101 vs C110, Properties, CNC Machining and ConductivitySep 29, 2026
• Titanium for CNC Machining: Grades, Tooling, Heat, Tolerances and ApplicationsSep 24, 2026
• Bronze Metal for Machined Parts: Bearing Grades, Bushings, Wear and CNC ConsiderationsSep 24, 2026
• What Is Brass? Alloy Grades, CNC Machinability, Properties and FinishingSep 24, 2026
• 316 vs 316L Stainless Steel: What Actually Changes When You Drop the CarbonSep 16, 2026
• CNC Machining Materials: A Cost-Effective Metal Selection GuideSep 14, 2026
• Titanium vs Stainless Steel: Ti-6Al-4V vs 316L for Aerospace and Medical PartsSep 14, 2026
• Machining Cast Iron: Grades, Chip Behavior, and Casting Blank Checks for CNC BuyersSep 13, 2026
• Cast Iron vs Steel for CNC Machining: Grades, Machinability, and What Changes After CastingAug 31, 2026
• 4140 Alloy Steel vs 1018 and 1045 Carbon Steel for CNC PartsAug 30, 2026

Plastics & Polymers

• Flexural Modulus of Plastics: Formula, Testing and Design UseNov 1, 2026
• Nylon 3D Printing Filament: PA Grades, Moisture, Strength and Print StabilityNov 1, 2026
• PET 3D Printer Filament: Properties, PET vs PETG, Printing and Material SelectionOct 20, 2026
• Compression Set in Elastomers: Testing, Graphs, Recovery and Seal DesignOct 19, 2026
• Polypropylene vs Nylon: UV Resistance, Weathering Tests and Grade-Level SelectionOct 18, 2026
• Best Plastics for Laser Cutting: Materials, Safety and Cut QualityOct 17, 2026
• Plastic Creep: Deformation, Testing, Curves, and Long-Term DesignOct 17, 2026
• ABS Injection Molding: Grade Selection, Temperatures, Shrinkage and Part ValidationOct 16, 2026
• PTFE Machining: Creep, Tolerances, Surface Finish, Inserts and Chemical ServiceOct 15, 2026
• Polyamide (Nylon) for Machined and Molded Parts: Moisture, Creep, Tolerances and Grade SelectionOct 13, 2026
• HDPE for Machined Parts: Material Behavior, Tolerances, Surface Finish and ApplicationsOct 12, 2026
• ABS vs PETG Filament: Strength, Heat, Warping and Part SelectionOct 11, 2026
• ABS 3D Printing Filament: Properties, Warping, Heat Resistance and Process ControlOct 10, 2026
• PLA vs PLA+: Differences, Strength, Heat Resistance, and Print SettingsOct 10, 2026
• PETG vs PLA for 3D Printing: Strength, Heat Resistance, Printability and Part SelectionOct 10, 2026
• PLA Filament for 3D Printing: Composition, Properties, Heat Resistance and UsesOct 9, 2026
• PETG Filament for 3D Printing: Properties, Temperatures, Drying and UsesOct 9, 2026
• Polypropylene (PP) for Manufacturing: Properties, Injection Molding, Machining, Living Hinges, Creep and RecyclingOct 7, 2026
• 3D Printer Filament Types: Polymer Families, Feedstock Quality, Drying, Printability and SelectionOct 6, 2026
• Shear Modulus for Polymers and 3D-Printed Parts: Formula, Torsion Testing, Dynamic G, and AnisotropyOct 6, 2026
• PEEK Machining and Molding: Grades, Properties, Annealing, Tolerances and InsertsSep 30, 2026
• Plastic Injection Molding Process: From Part Design to Mold Tooling to Mass ProductionAug 21, 2026
• Nylon Parts for Engineering Applications: Industry Use Cases, Tolerances, and Procurement ChecklistJul 15, 2026
• PA6 vs PA66 vs PA12: Nylon Grades Compared — Properties, Modifications, and When to Switch MaterialsJul 12, 2026
• Nylon (Polyamide) Properties: The Engineer’s Selection Guide for CNC Machined PartsJul 6, 2026

Composites & Ceramics

• Carbon Fiber 3D Printing: Material Types, Properties, Applications, and TestingOct 20, 2026
• Engineering Ceramics: Machining, Grinding, Tolerances, Additive Manufacturing and ApplicationsOct 13, 2026
• Fiberglass in Manufacturing: GFRP Types, Properties, Machining, Dust, Holes and InsertsOct 1, 2026

Mechanical & Thermal Properties

• Charpy Impact Strength for Plastics: Charpy Impact Test, Specimens & ResultsOct 25, 2026
• Impact Strength of Plastics: Izod vs Charpy, Notch Sensitivity, Temperature and Design UseOct 19, 2026
• Heat Deflection Temperature (HDT): Tests, Factors and Design LimitsOct 18, 2026
• Elongation in Plastics and 3D-Printed Parts: Formula, Strain at Break and TestingOct 9, 2026
• Compressive Stress in Plastic Parts: Formula, Testing, Strength and Failure ModesOct 9, 2026
• Ultimate Tensile Strength (UTS): What It Measures and How to Read It on an MTROct 6, 2026
• Stress-Strain Curve for Engineers: Yield, UTS, Elongation and What the Curve Does Not Tell YouOct 2, 2026
• Yield Strength and 0.2% Proof Stress: How to Read Test Data and Material CertificatesOct 1, 2026
• Tensile Strength in Material Selection: Testing, MTR Values, and Manufacturing RelevanceSep 30, 2026
• Annealing Before and After Machining: Stress Relief, Hardness and Dimensional StabilitySep 27, 2026
• CNC Part Weight Calculator: Metal Weight Calculator and Density ChartSep 20, 2026
• Yield Strength vs Tensile Strength: How to Read Them for CNC Part SelectionSep 7, 2026
• Metal Strength Chart: Tensile, Yield, Hardness & Density for CNC MaterialsSep 3, 2026
• Aluminum Heat Sink Material Selection: 6061 vs 6063 vs 1050 Thermal Conductivity, and Why 5052 and 7075 Fall ShortAug 28, 2026
• Type II vs. Type III Anodizing (2026): Hardness, Color, and When to Specify Hard CoatAug 9, 2026
• Nylon Mechanical Properties & Machinability: Tensile Strength, HDT, Moisture Effects, and CNC ParametersJul 7, 2026

Engineering & Quality

24 articles

Engineering Standards & Tolerances

• Types of Fits in Engineering: Clearance, Transition and Interference Explained with ISO 286Sep 16, 2026
• Micro Milling in Practice: Tool Diameter, ISO 21920 Callouts, and the Decision to SwitchSep 12, 2026
• CNC Machining for EV Motor Housings and Battery Enclosures: What ISO 1101, IEC 60529, and ASTM B221 RequireSep 11, 2026
• ISO 286 Fits Explained: H7/g6, Transition, and Interference for CNC Parts (2026 Edition)Jul 31, 2026
• Metric Thread Chart and Tapped Hole Callouts: Sizes, Tap Drills, and Depth RulesJul 28, 2026
• ISO 2768 General Tolerances: Class Tables, Title Block Wording, and the 2026 RevisionJul 26, 2026

Testing, Measurement & Inspection

• History of CNC Machining: Which Changes Improved Repeatability?Oct 22, 2026
• Deep Hole Drilling RFQ Risks: Straightness, Chip Evacuation and InspectionOct 22, 2026
• Polycarbonate Injection Molding: Grades, Drying, Process and InspectionOct 19, 2026
• Garolite Machining: G10 vs FR4, CNC Tooling, Tolerances and InspectionOct 16, 2026
• Izod Impact Strength: Test Methods, Calculation, ASTM D256 vs ISO 180, and 3D PrintingOct 11, 2026
• Bevel vs Chamfer: Drawing Callouts, Machining Methods, Weld Prep and InspectionOct 8, 2026
• Bulk Modulus in Engineering Materials: Compressibility, Elastic Constants, Measurement Limits and Design UseOct 5, 2026
• Tensile Stress in 3D-Printed Parts: Formula, Stress-Strain Data, Anisotropy, Test Methods and Design LimitsOct 5, 2026

DFM & Product Design

• Modulus of Elasticity vs Strength: What Stiffness Means for CNC Part DesignOct 2, 2026
• CNC Prototype Design Risks: 10 DFM Mistakes That Delay Parts and Inflate CostsJun 23, 2026

Procurement, RFQ & Supplier Quality

• How to Evaluate a CNC Supplier: What Purchasing Engineers Verify Before Placing the First POSep 19, 2026
• CNC Machining Quote Checklist for China: What to Send Your SupplierSep 18, 2026

Other Engineering Articles

• Face Mill vs End Mill: Finishing Large Sealing SurfacesOct 27, 2026
• Galvanneal vs Galvanized Steel After Fabrication: What Changes?Oct 26, 2026
• What Is a Heat Sink? Design, Fin Geometry, Manufacturing, and Cooling ChoicesOct 15, 2026
• Stress vs Strain for Manufacturing: How to Read Material Behavior Beyond the DefinitionsSep 28, 2026
• Shear Stress in Machined Parts: Formula, Failure Modes, Fasteners and Design ChecksSep 28, 2026
• From Prototype to Low-Volume Production: When and How to Make the SwitchJun 17, 2026

Manufacturing Processes

45 articles

CNC Machining

• CNC Machining Lead Time: Can This Quote Really Be Met?Oct 27, 2026
• Soft Machining for Thin Walls and Soft Materials: Low-Force CNC StrategiesOct 26, 2026
• Quick Turn CNC Machining: Which Parts Can Meet an Urgent Deadline?Oct 22, 2026
• CNC Router vs CNC Mill: How to Verify Precision Metal Machining CapabilityOct 22, 2026
• Machining Center Types and Mill-Turn Compared for Part GeometryOct 21, 2026
• CNC vs Manual Machining for Low Volume Parts and Secondary OperationsOct 21, 2026
• What Is an Alloy? How Composition Changes Machinability, Strength, Corrosion and CostOct 14, 2026
• What Is TIG Welding? Process, Applications, Heat Input and Finish MachiningOct 14, 2026
• Shielded Metal Arc Welding (SMAW) in Fabrication: Process, Weld Prep, Distortion and Finish MachiningOct 8, 2026
• Epoxy Resin in Manufacturing: Bonding, Tooling and MachiningOct 7, 2026
• Types of Metals for Manufacturing: Properties, Machinability, Cost and SelectionOct 6, 2026
• Tungsten Machining: W-Ni-Fe Heavy Alloy Properties, Tool Wear, Heat and Practical LimitsSep 28, 2026
• Steel for CNC Machining: Carbon, Alloy and Stainless Grades ComparedSep 26, 2026
• G-Code and M-Code for CNC Machining: Work Offsets, Tool Compensation, Post-Processors, and Program VerificationSep 22, 2026
• Sinker EDM Machining: How the Process Works, Where It Wins, and How to Spec ItSep 21, 2026
• What Is Welding and How Does It Work: Process Families, HAZ, and Post-Weld MachiningSep 21, 2026
• Step Turning on CNC Lathes How Stepped Shafts Shoulders and Bearing Seats Are MachinedSep 20, 2026
• CNC Machining Tolerances and Cost: What Each Precision Tier Actually RequiresSep 8, 2026
• Tight Tolerance Machining: Which CNC Features Need Tighter Control?Sep 1, 2026
• How to Tolerance a CNC Drawing: What to Specify, What to Leave DefaultAug 2, 2026
• Surface Roughness Chart for CNC Parts: Ra, Rz, and What Each Process Actually DeliversJul 30, 2026
• CNC Machining for Prototyping and Low-Volume Production: The Complete Engineering GuideJun 11, 2026

Injection Molding

• Injection Molding Machine Specifications: Tonnage, Shot Size & RFQ ChecklistOct 21, 2026
• Overmolding Materials: Selection, Compatibility and TestingOct 20, 2026
• Injection Molding Defects Guide: Root Causes, Severity Grading, and DFM FixesAug 20, 2026
• Injection Molding Design Guide: Wall Thickness, Draft Angles, Ribs, and DFM Rules by MaterialAug 18, 2026
• Injection Molding Materials Guide: Properties, Selection Criteria, and Processing DataAug 16, 2026

3D Printing & Additive Manufacturing

• Residual Stress and Distortion in LPBF: Thermal Gradients, Supports and Stress ReliefOct 28, 2026
• Metal 3D Printing Safety: Powder Exposure, Fire, Inert Gas and PBF-LB Machine HazardsOct 25, 2026
• Metal 3D Printing Technologies: PBF-LB/M, PBF-EB, DED, Binder Jetting, Feedstock and Process SelectionOct 7, 2026
• CNC Machining vs. 3D Printing for Prototypes: Cost, Lead Time, and Tolerance ComparisonJun 14, 2026

Laser Cutting & Marking

• Laser Cutting Materials: What Can You Cut and What Are the Limits?Oct 17, 2026
• Laser Marking for Automotive CNC Parts: Materials, Sequence, and Data Matrix DPM VerificationSep 15, 2026

Sheet Metal Fabrication

• TIG vs MIG Welding for Precision Sheet Metal EnclosuresOct 28, 2026
• Sheet Metal Hem Design: Safe Edges, Cracking and Assembly FitOct 24, 2026
• Sheet Metal Dimple Forming: Flared Hole Design, Stiffness and Flush FastenersOct 24, 2026
• Sheet Metal Tolerances: Hole Spacing, Edge Distance, and Feature Design RulesAug 26, 2026
• Sheet Metal Bend Radius and K-Factor: Charts, Formulas, and Flat Pattern CalculationAug 24, 2026
• Sheet Metal Design Guidelines: DFM Rules, Tolerances, and Best PracticesAug 23, 2026

Casting & Urethane

• What Is Urethane? Types, Properties, Uses, and CastingOct 18, 2026
• What Is Zinc? Properties, Alloys, Die Casting, Galvanizing and MachiningOct 8, 2026
• What Is Die Casting? Process, Alloys, Defects, and CNC Finishing ExplainedSep 22, 2026
• What Is Metal Casting? Processes, Defects, Machining Allowance, and CNC FinishingSep 16, 2026

Surface Finishing & Heat Treatment

• Iron-Carbon Phase Diagram for Machining and Heat Treatment: What Actually Changes in SteelOct 13, 2026
• Heat Treatment Before or After CNC Machining: When Each Sequence WorksSep 2, 2026

Cases & Industry

12 articles

Manufacturing Case Studies

• Press-Fit Rivet Nut Installation in a 2 mm SPHC Sheet: How We Held Flatness ≤ 0.08 mm for a Japanese Automation BuyerSep 23, 2026
• How a 300×280×260mm 6061-T6 Aluminum CNC Machining Cavity Held 0.04mm Flatness Across Six FacesSep 17, 2026
• Cast Urethane Parts, No Steel Mold: A 250-Piece Case for an Automation ClientSep 13, 2026
• CNC Machined Aluminum Parts: 160-Piece Order from CAD to Europe in 9 DaysSep 12, 2026
• Stainless Steel CNC Machining: How We Held 0.018 mm Profile on a 316L Cantilever S-HookSep 11, 2026
• Anodized Aluminum Parts for EV Interior Trim: A 6063 Console Panel That Cleared German CMF ReviewSep 10, 2026
• Thin-Wall Aluminum Optical Base: How We Held a 45 mm Deep Bore at 0.015 mm on 3.5 mm WallsSep 9, 2026
• Aluminum FSW Cooling Cavity: Holding a 0.8 MPa Seal on 350 PartsSep 9, 2026
• The gauge passed on the machine. A day later it had movedSep 8, 2026

Manufacturing Trends

• OEM vs ODM vs Contract Manufacturing: Design, Tooling and Quality ResponsibilitiesOct 24, 2026
• ISO 2768 Edition 2: What Changes for CNC Drawings in 2026Sep 6, 2026
• ISO 9001:2026 Is Under Publication: What CNC Buyers Should CheckSep 5, 2026