CNC machining buyer guides, material selection notes, FAQ content and industry insights from JRCNC.
Two quotes for the same drawing often differ by more than the machine hour rate, because the drawing itself decides how much tolerance, setup and inspection t……
Learn MoreA prototype that passed inspection does not prove that the production process will make the same part. It proves that one approved configuration — one drawing……
Learn MoreThe wrong drawing reaching a machine is rarely dramatic. Usually it is a PDF that was renamed, an attachment opened from a download folder, or a dimension agr……
Learn MoreMachining a welded assembly is one of the least forgiving jobs in contract manufacturing, because the blank that reaches the milling machine is not a piece of……
Learn MoreRunout is one of the most common callouts on a turned part drawing, and one of the most frequently misunderstood at the RFQ stage. If you are buying a shaft, ……
Learn MoreWhen a buyer writes “drill and ream to size” on a drawing, they are prescribing a process rather than stating what the hole must do. The more usef……
Learn MoreAn undercut is a recessed feature that a straight cutting tool cannot reach, and an internal corner is the radius an ordinary milling cutter leaves behind whe……
Learn MoreWhat packaging actually has to prevent after inspection A precision CNC part leaves the inspection bench in a known-good condition. What happens in the box be……
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Edge condition is one of the small drawing details that can create large differences in a CNC machined part. A buyer may write “deburr all edges” ……
Learn MoreIf you buy CNC machined parts in batches, the inspection question that decides your risk is simple: how many pieces should be measured, and what result lets y……
Learn MoreWhen a buyer asks a CNC machine shop for “the material certificate,” they are usually asking for one of three very different documents — and the s……
Learn MoreIf the first article from a new CNC fixture measures perfectly but the tenth or hundredth does not, the problem is usually not the machine — it is the datum s……
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