Process Selection

Sand Casting vs. Investment Casting: How to Choose

Tolerance, surface finish, wall thickness, weight, cost and volume — compared with the real numbers, so you can pick before you tool up.

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Process Selection

3D Printing vs. CNC Machining for Prototyping: How to Choose

Speed, tolerance, real material performance, finish and cost — compared with the real numbers, plus the "print first, machine later" strategy that keeps validation fast and cheap.

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More guides on materials, tolerances and sourcing are on the way.