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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