In-depth technical articles, material comparisons, CNC machining insights, and problem-solving guides from the Jucheng engineering team.
September 17, 2026
An AQL sampling plan for CNC machined parts is a lot-acceptance rule, not a promise that the shipment contains no defects. It defines how a sample is selected, how defects…
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September 17, 2026
CNC process capability describes whether a stable machining process can repeatedly hold a defined specification; Cpk estimates how well the…
September 16, 2026
CNC material and dimensional traceability is the evidence chain that connects a shipped part to the stock, drawing revision, manufacturing…
September 16, 2026
First article inspection for CNC machined parts is a production-release checkpoint, not a ceremonial report. It confirms that the drawing,…
September 16, 2026
CMM, optical comparator, and manual inspection are not interchangeable checkpoints. Each method answers a different measurement question. A CMM is…
September 15, 2026
CNC setup and tooling costs are often hidden inside a unit price, even though they can decide whether a short…
September 15, 2026
CNC machining cost per part calculation is more useful when it separates recurring production cost from one-time preparation and risk.…
September 15, 2026
ISO 2768 for CNC machining drawings is a way to assign general tolerances to dimensions that do not have individual…
September 14, 2026
CNC tolerance stack-up analysis for assemblies explains why several individually acceptable parts can still create a tight, loose, misaligned, or…
September 14, 2026
CNC hole and shaft fit design should begin with the assembly job, not with a familiar letter-number fit copied from…
