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Title: XTJ CNC Sets Out Tolerance Standards Applied to Precision Machining Work

Carmel, IN 46032, United States, 20th Aug 2026 - XTJ CNC, a renowned provider of precision CNC machining services, has set out the tolerance standards applied to its machining work, describing how dimensional requirements are graded and what process controls attach to each grade. The description separates general limits, tolerances that sit within routine process capability, and the tighter bands that require additional setups, fixturing, and in-process measurement. The company has published the detail as buyers of machined components increasingly request written confirmation of achievable accuracy, and the controls behind it, before drawings are released for quotation.Requirements are grouped into three broad categories. Dimensions carrying no individual callout on a drawing are held to a recognised general tolerance class, confirmed with the customer at quoting. Nominated dimensions that fall within routine process capability are machined and verified through standard inspection. A third category covers features requiring bands tighter than routine practice, which are accepted only after review of the geometry, the material, and the number of operations involved, and which carry additional controls agreed in advance.The company has noted that tightening a tolerance carries consequences beyond the machining step itself. Tighter bands generally extend cycle times, increase tool change frequency, raise inspection sampling rates, and reduce the margin available before a component is rejected. For that reason, XTJ CNC advises customers to apply tight limits only to features with a functional requirement, such as bearing seats, sealing faces, or mating interfaces, and to leave non-functional dimensions at general limits. Drawings that apply uniform tight tolerances across e...

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