32 practical engineering guides
Structured learning paths for mechanical design, CAD, DFM, tolerancing, additive manufacturing and production drawings.
Wall Thickness in Injection Molding
How wall thickness affects filling, cooling, sink, warpage and cost in injection molded plastic parts.
DFM · Injection moldingRib Design for Injection-Molded Parts
Practical rib design guidance for stiffness, sink control, draft, fillets and manufacturability.
DFM · Injection moldingBoss Design for Injection-Molded Parts
How to design molded bosses for screws, inserts and assembly while controlling sink and tool risk.
DFM · Injection moldingUndercuts in Injection Molding
Understand molded undercuts, stripping, side actions, lifters and when geometry increases tooling complexity.
DFM · Injection moldingParting Lines and Mold Orientation
How parting lines, shutoffs and mold orientation affect molded-part appearance and tool complexity.
Mechanical design · DFMSnap-Fit Design Fundamentals
A practical introduction to cantilever snap fits, strain, retention, assembly force and molded design.
DFM · TolerancingInjection Molding Tolerances: A Design Approach
How to think about molded-part tolerances, shrinkage, process capability and critical dimensions.
Tolerancing · GD&TGD&T Basics for Mechanical Designers
Understand why geometric dimensioning and tolerancing controls form, orientation and location more clearly than coordinate dimensions alone.
Tolerancing · GD&THow to Choose Datums in GD&T
A functional method for selecting primary, secondary and tertiary datums on mechanical parts.
Tolerancing · GD&TPosition Tolerance Explained
How position tolerance controls holes, pins and feature patterns and why it is useful for assembly.
CAD · File formatsSTEP vs IGES for CAD Exchange
Compare STEP and IGES for transferring solid, surface and product geometry between CAD systems.
CAD · WorkflowHow to Prepare a CAD Model for Manufacturing
A release checklist for cleaning, validating and packaging CAD before sending it to a manufacturer.
Manufacturing · CNC machiningCNC Machining Design Rules
Practical CNC design rules for internal corners, cavities, holes, tool access and tolerances.
Manufacturing · Sheet metalSheet Metal Design Basics
Practical sheet-metal design guidance for bend radius, holes, reliefs, flanges and flat patterns.
Additive manufacturing · FDMFDM / FFF Design Rules
Design guidance for FDM/FFF parts: orientation, anisotropy, walls, holes, supports and assembly clearances.
Additive manufacturing · MaterialsPLA vs PETG vs ABS vs ASA
Compare four common FDM materials by printability, temperature resistance, toughness and outdoor use.
CAD · ModelingSolid vs Surface Modeling in CAD
Understand when solid modeling, surface modeling and hybrid workflows are appropriate in mechanical design.
CAD · Parametric modelingHow to Build More Robust Parametric CAD Models
Practical habits for stable feature trees, references, design intent and easier engineering changes.
CAD · DrawingsEngineering Drawing Release Checklist
A practical checklist for releasing manufacturing drawings with clear dimensions, tolerances and requirements.
Career · Mechanical engineeringHow to Build a Mechanical Engineering Portfolio
What to show in a mechanical engineering portfolio when applying for CAD, design or manufacturing roles.
DFM · Injection moldingDraft Angle in Injection Molding
Draft angle explained for injection molded parts: purpose, ejection, texture, pull direction and CAD workflow.
CAD · File formatsSTEP vs STL vs 3MF
Compare STEP, STL and 3MF for CAD exchange, manufacturing and 3D printing.
Mechanical design · TolerancingTolerance Stack-Up Explained
How dimensional tolerances combine in assemblies using worst-case and statistical thinking.
Mechanical designBeam Bending Basics
Loads, bending stress, EI stiffness, deflection and the limits of simple beam theory.
Read guide →Mechanical designShaft Torsion Basics
Shear stress, polar moment, angle of twist and real shaft-design checks.
Read guide →Mechanical designCompression Spring Design Basics
Rate, spring index, stress correction, coil bind, stability and fatigue.
Read guide →Power transmissionPower, Torque & Speed
Use the energy relationship before rating components.
Read guide →GearsSpur Gear Design Basics
Ratio, module, pitch geometry and what comes next.
Read guide →BeltsBelt Drive Basics
Pitch diameter, ratio, wrap and rating considerations.
Read guide →BearingsRolling Bearing L10 Life
What the basic life calculation means and omits.
Read guide →StabilityEuler Column Buckling
Effective length, stiffness and ideal-column limits.
Read guide →VerificationFactor of Safety
Define the failure mode before trusting the number.
Read guide →Need to choose a material too?
V0.4 adds 16 concise polymer and metal profiles plus a browser-local comparison tool.
Follow a complete learning path
Use a topic hub when you want connected guides, tools and verification steps rather than a single article.
Use the Design Handbook as your map
Move from requirements and process selection through DFM, GD&T and final drawing release.