|
Term |
Symbol |
30 deg φ D |
37.5 deg φ D |
45 deg φ D |
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|
Flat Root Side Fit |
Flat Root Majot Dia Fit |
Fillet Root Side Fit |
Fillet Root Side Fit |
Fillet Root Side Fit |
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|
2.5/5 - 32/64 Pitch |
3/6 - 16/32 Pitch |
2.5/5 - 48/964 Pitch |
2.5/5 - 48/96 Pitch |
10/20 - 128/256 Pitch |
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|
Stub Pitch |
P s |
2P |
2P |
2P |
2P |
2P |
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|
Pitch Diameter |
D s |
N/P |
N/P |
N/P |
N/P |
N/P |
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|
Base Diameter |
D b s |
D coc φ D |
D cos φ D |
D cos φ D |
D coc φ D |
D coc φ D |
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|
Circular Pitch |
p s |
π/P |
π/P |
π/P |
π/P |
π/P |
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|
Minimum Effectice Space Width |
s v s |
π/(2P) |
π/(2P) |
π/(2P) |
(0.5 π + 0.1)/P |
(0.5 π + 0.2)/P |
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|
Major Diameter, Internal |
D ri s |
(N + 1.35)/P |
(N + 1)/P |
(N + 1.8)/P |
(N + 1.6)/P |
(N + 1.4)/P |
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|
Major Diameter, External |
D o s |
(N + 1)/P |
(N + 1)/P |
(N + 1)/P |
(N + 1)/P |
(N + 1)/P |
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|
Minor Diameter, Internal |
D i s |
(N - 1)/P |
(N - 1)/P |
(N - 1)/P |
(N - 0.8)/P |
(N - 0.6)/P |
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|
Minor Dia. Ext. |
2.5/5 thru 12/24 Pitch |
D re |
(N - 1.35)/P |
(N - 1.8)/P |
(N - 1.3)/P |
... |
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|
16/32 Pitch and finer |
(N - 2)/P |
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|
10/20 Pitch and finer |
... |
(N - 1)/P |
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|
Form Diameter, Internal |
D Fi |
(N + 1)/P + cF |
(N + 1)/P - 0.004 + 2cF |
(N + 1)/P + 2cF |
(N + 1)/P + 2cF |
(N + 1)/P + 2cF |
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|
Form Diameter, External |
D Fe |
(N - 1)/P - cF |
(N - 1)/P - 2cF |
(N - 1)/P - 2cF |
(N - 0.8)/P - 2cF |
(N - 0.6)/P - 2cF |
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|
Form Clearance, Radial |
c F |
0.001 D, with max of 0.010, min of 0.002 |
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