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involute_splines_&_serrations_30_pa

By Jeanette Watson,2014-06-01 03:31
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involute

    Technical Gear Information

    INVOLUTE SPLINES AND

     SERRATIONS 30? PA

    To Get Having Rule Formula

    Diametral Pitch Outer diameter and number Divide number of teeth plus 1 Pd=N+1/Do

    of teeth by the outer diameter

    Pitch diameter Outer diameter and number Divide the product of outer D=N•Do/N+1

    of teeth diameter and number of

    teeth by number of teeth plus

    1

    Outer diameter Diametral pitch and number Divide the number of teeth Do=N+1/(N/d)

    of teeth plus 1 by the quotient of

    number of teeth divided by

    pitch diameter

    Diametral pitch Internal diameter and Divide number of teeth minus Pd=N-1/D

    number of teeth 1 by the internal diameter

    Internal diameter Diametral pitch and number Divide number of teeth minus Di=N-1/Pd

    1 by

    STANDARD SAE

    PARALLEL KEY SPLINE

    A Fit B Fit To Slide C Fit To Slide Space Nominal NO. of Permanent Fit Not Under Load Under Load Width Major Keys Internal Diameter WD Minor WD Minor WD Minor 4 0.241D 0.075D 0.850D 0.125D 0.750D To 3" 6 0.250D 0.050D 0.900D 0.075D 0.850D 0.100D 0.800D To 3" 10 0.156D 0.045D 0.910D 0.070D 0.860D 0.095D 0.810D To 6" 16 0.098D 0.045D 0.910D 0.070D 0.860D 0.095D 0.810D To 6"

    POINT WIDTH CONVERSION FOR

    STRAIGHT SIDED SPLINE

    EXAMPLE

    N= # of Keys B= 180/6= 30?

     SIN “A”= .2919

    B=180?/N A= 16.97151?

     C= 13.02849

    SIN A= KW/RD SIN “C”= .22543

    C= B-A W= 1.271•.22543

    PW= RD X SIN PW= .2865

    “C”

    N=6

    KW= .371

     RD= 1.271

Return to Index

    Reprinted from Ash Gear & Supply

    Omni Gear and Machine Corporation - 90 Bissel Street - Joliet, Illinois 60432

    Toll Free: (800) 876-7216 - Fax: (815) 723-9207

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