Exceptions:
-
The external major diameter, unless chamfered or reduced, may
interfere with the internal form diameter on flat root side fit
splines. Internal
splines made to the 1957 and 1960 standards had the same dimensions
as shown for the major diameter fit splines in this standard.
- For
15 teeth or less, the minor diameter of the internal spline, unless
chamfered, will interfere with the form diameter of the external
spline.
- For
9 teeth or less, the minor diameter of the internal spline, unless
chamfered, will interfere with the external form diameter.
- The
internal minor diameter, unless chamfered, will interfere with the
external form diameter.
- The
internal minor diameter, unless chamfered, will interfere with the
external form diameter.
- For
10 teeth or less, the minimum chamfer on the major diameter of the
external splines may not clear the internal for diameter.
- Depending
upon the pitch of the spline, the minimum character on the major
diameter may not clear the internal form diameter.
|
| Year |
Major Dia. Fit |
Flat Root Fit |
Fillet Root Side Fit |
| External Splines |
1946
1950a
1950b
1957SAE
1960 |
Yes
Yes (B)
Yes(B)
Yes
Yes |
No (A)
Yes (B)
No (A)
No (A)
No (A) |
No (A)
Yes ( C)
Yes ( C)
Yes ( C)
Yes ( C) |
| Internal Splines |
1946
1950
1957SAE
1960 |
No
(D)a
Yes (F)
Yes (G)
Yes (G) |
No (E)
Yes
Yes
Yes |
No (D)
Yes ( C)
Yes
Yes |
Formulas for machining and variation
allowances for space width and tooth thickness - class 5
| Spline |
m |
y |
2.5/5
& 3/6
4/8 & 5/10
6/12 & 8/16
10/20 & 12/24
16/31 & 20/40
24/48 & thru 48/96
64/128 & 80/160
128/256 |
.18N
+ 14
.15N+13
.15N
+ 11
.10N
+ 11
.07N
+ 11
.07N
+ 11
.06N
+ 9
.05N
+ 9 |
.35N
+ 20
.23N
+ 18
.20N
+ 15
.17N
+ 14
.12N
+ 13
.12N
+ 11
.10N
+ 10
.08N
+ 9 |
For other tolerances classes:
Class 4 = 0.71 x Tabulated value
Class 5 = 0.00 x Tabulated value
Class 6 = 1.40 x Tabulated value
Class 7 = 2.00 x Tabulated value
|
