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lead screw

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  • What is the difference between Lead Screw and ACME Screw?Lead Screw"Lead Screw" is a general term that refers to all threaded transmission screws that transfer loads through sliding surface. ACME Lead Screw"ACME" is a term that refers to a specific thread shape. All ACME screws belong to lead screws


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  • 轴端类型Screw Typical Journal Ends轴端加工代号及特征 Screw Journal ends machining Symbol and Feature图例Diagram代号Symbol特征 Features固定端Fixed end(F)F联轴器端coupling end+锁紧螺纹thread lock+轴承位bearing block FM联轴器端coupling end(轴向螺纹孔axial threaded hole)+锁紧螺纹thread lock+轴承位bearing block FD联轴器端coupling end(铣单扁milling with one cu


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  • ACME Thread Lead Screw SizesNominal diameter(mm)Lead (mm)Pitch (mm)No. of threadsLeft HandThread height(mm)Major diameter(mm)Pitch diameter(mm)Minor diameter(mm)Maximum processing diameter(mm)Max.Min.Max.Min.Max.Min.4.76(3/16-20)1.271.271√0.794.764.634.063.883.493.203.345.5(7/32-22)4.581.154√0.725


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  • MaterialMaterial StandardHeat Treatment StandardTypeBrandHigh Carbon Chromium Bearing SteelGCr15GB/T 18254-2002 GB/T 18579-2001JB/T 1255GCr15SiMnGCr15SiMoGCr18MoHigh Carbon Chromium Stainless Bearing SteelG95Cr18(9Cr18)GB/T 3086-2008JB/T 1460-2011G102Cr18Mo(9Cr18Mo)G65Cr14MoHigh


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  • Nominal diameterHardness (HRC)>≤High-carbon chromium bearing steelHigh-carbon chromium stainless steel bearing steelHigh temperature bearing steel-3061~66≥5861~66305060~6550-58~64


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  • GradeDia.Tolerances and Ball Gauge Figure(μm)(mm)ToleranceBall Dia.Spherical ErrorSurface Roughness (Ra)Diameter VariationDistance of Dividers NumericalDividers NumericalG3-12±5.320.±5.630.130.130.0140.251-5...-10+1...+5G10-25±9.750.


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