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  • 06-16
    2020
    ACME Thread Lead Screw Sizes

    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 Read More »

  • 06-12
    2020
    Chinese Materials and Heat Treatment of Steel Balls

    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 Read More »

  • 06-11
    2020
    Hardness of steel balls

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

  • 06-10
    2020
    Sorting Tolerance and Ball Gauge Figure

    GradeDia.Tolerances and Ball Gauge Figure(μm)(mm)ToleranceBall Dia.Spherical ErrorSurface Roughness (Ra)Diameter VariationDistance of Dividers NumericalDividers NumericalG3-12±5.320.080.080.010.130.5-5...-0.50+0.5...+5G5-12±5.630.130.130.0140.251-5...-10+1...+5G10-25±9.750.250.250.020.51-9...-10+1.. Read More »

  • 06-09
    2020
    GCr15 Bearing Steel Ball Size and Weight

     DiameterWeight per 1000 pcsQuantity per 1 kgInchmmkgpcs-0.500.000511960780-0.680.00128781250-0.800.00209478470-1.000.00408245100-1.200.00705141840-1.300.00893111980-1.450.0124806451/161.58750.01662350-1.750.021845871-2.000.0326307003/322.38120.05518182-2.500.063715698-3.0000.1190911/83.1750.1317634 Read More »

  • 05-20
    2020
    Metric and inch threads and materials

    Inch Series and Metric Threads Decarburization Limits Read More »

  • 05-19
    2020
    What are Trapezoidal Screws?

    Trapezoidal screw pair (Tr thread, tooth Angle 30°) is a power transmission device. Generally according to the German standard DIN103 (DIN103 has been adopted by ISO as an international standard). The counterpart is the ACME threaded lead screw pair (tooth Angle 29 °) in British system. Generally us Read More »

  • 05-08
    2020
    TYPICAL PROPERTIES OF ACETALS

    TYPICAL PROPERTIES of ACETALSASTM or UL testPropertyAcetal CopolymerHomopolymerAF PTFE-filledPHYSICALD792Density (lb/in³) (g/cm³)0.0511.410.0511.410.0541.50D570Water Absorption, 24 hrs (%)0.20.20.2MECHANICALD638Tensile Strength (psi)9,50011,0008,000D638Tensile Modulus (psi)400,000450,000435,0 Read More »

  • 05-08
    2020
    TYPICAL PROPERTIES OF PEEK

    TYPICAL PROPERTIES OF PEEK Read More »

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