RESOURCES
Use these resources for early selection and internal purchasing communication. Stock, price, lead time, size range and final acceptance values remain order-specific.
PDF · CN / EN
A 3-page A4 file covering 8 product types, 4 capability figures, their boundaries and the RFQ checklist.
SHAFT KNOWLEDGE BASE
Built from official ISO, ASTM and Chinese national-standard pages to clarify terminology, parameters and acceptance boundaries. These guides do not replace the standards, drawings or technical agreement.
PROCUREMENT GUIDE
A practical RFQ checklist for chrome-plated shafts, ground round bars and Q&T shaft materials, covering dimensions, condition, surface, inspection and delivery scope.
Read technical guideSIZE & FIT
A clear explanation of basic size, deviations, tolerance zone and fit, plus the measurement conditions needed for long or precision shafts.
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SURFACE & GEOMETRY
Why surface texture, shaft form and run-out must be specified separately, with the measurement information needed for purchasing and acceptance.
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ENGINEERING CHROME
A purchasing guide to engineering chrome versus decorative chrome, coating thickness, substrate condition, finishing, inspection location and final dimensions.
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MATERIAL & HEAT TREATMENT
Using current Chinese national standards to separate material grade, delivery condition, Q&T requirements and document scope without assuming equivalence.
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INSPECTION & REPORTS
A buyer's guide to Rockwell and Vickers results, explaining why one point, different scales and converted values should not be mixed without context.
Read technical guideGLOSSARY
Concise definitions used by this site for selection. The confirmed technical agreement remains authoritative.
RFQ CHECKLIST