
DMLS Metal 3D Printing vs CNC: When Is Additive Actually Cheaper?
Material waste, complexity premium, post-processing and 4 real customer cases — when DMLS metal 3D printing beats CNC machining on cost, and when it absolutely doesn’t.

ISO 2768 tolerance grades explained, cost multipliers per tolerance band, fit relationships and the 7 most common over-spec mistakes engineers make on CNC drawings.

MOQ thresholds, post-machining cost, surface finish, strength, tooling payback and 4 real customer cases — when die casting beats CNC machining for aluminum housings.

Seven proven CNC design rules that cut machining cost 30-50% — pocket geometry, internal radii, wall thickness, hole standardization, tolerance, fixturing, surface finish.

7075 is roughly 2× the cost of 6061 and 85% stronger. We unpack the chemistry, mechanical data, weldability, anodizing and corrosion tradeoffs so you spec the right alloy without overpaying or under-engineering.

5-axis CNC is roughly 2× the hourly rate of 3-axis but can hit 0.3-0.5× the cycle time on a complex part. We break down the geometric, economic and quality factors that decide whether the upgrade pays back — with five worked scenarios and a one-line decision rule.