Drawing-led guidance for machining, materials, tolerances, quality and production decisions, written for engineers and procurement teams.
Use the categories above to move between machining fundamentals, drawing preparation, material choices and inspection strategy.
When to use Swiss machining is a bar-and-bushing decision for small parts, not a quality slogan. Choose Swiss when the stock is small-diameter bar, the cut must stay next to a guide bushing, and…
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Know when 5-axis is not worth the cost: every feature is reachable on a 3-axis mill, the drawing uses ISO 2768-m (or looser) on general sizes, and you are not protecting a multi-face ASME…
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How to vet a Chinese CNC supplier is a file-and-floor test, not a website test. Get the legal company name, a video of the mill or lathe that would run your 6061 or 304…
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Type II vs Type III anodizing on CNC aluminum is a thickness and duty-cycle choice, not a color preference. MIL-A-8625 Type II sulfuric anodizing is 0.00007 to 0.0010 in (1.8 to 25.4 µm). Type…
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CNC turning vs Swiss for custom shafts is a workholding decision on a round axis, not a milling decision. Quote conventional CNC turning when the shaft is chucked or colleted on a shoulder, the…
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CNC turning quote drawings what to include is a file pack, not a pretty screenshot. Send a STEP (or STP/IGES) model plus a dimensioned PDF. Name the material and temper (6061-T6, 304, 4140, C360).…
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CNC turning length to diameter ratio (L/D) is a stiffness problem on the lathe, not a brand of machine. Unsupported bar or a slender 4140, 304, or 6061-T6 shaft will chatter, taper, and lose…
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CNC turning concentricity and runout are not interchangeable notes. On a shaft or bushing, circular or total runout to a datum diameter is what most shops can check with a V-block and indicator. ASME…
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How to spec anodizing on a CNC drawing is a finish-block problem: Type, Class, thickness, and which dimensions are post-coat. Write MIL-A-8625 Type II (1.8-25.4 µm) or Type III (12.7-114 µm), Class 1 or…
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How to send CAD files to a China CNC factory is a packaging job: one STEP (or STP, IGES, X_T) solid, one PDF drawing with the same revision, and a short RFQ line for…
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