Involute Spline Names, Symbols, and Relations for GOST Standard
Name | Symbol | Relation |
Module | m | - |
Pressure angle | α | α = 30 o |
Diameter of pitch circle | d | d = m N |
Shaft tooth height | h | h min = h a + h fmin |
Shaft tooth height when centering to tooth sides Shaft tooth height when centering outside | h a | h a = 0.45mm h a = 0.55m |
Shaft tooth height | h | h min = h a + h fmin |
Hub dedendum: flat bottom of groove round bottom of groove | H f | H fmin = 0.55m H fmin = 0.65m H f = 0.77m |
Radius of tooth transition curve | ρ r | ρ rmin = 0.15m |
Nominal groove width on pitch circle | e | e = π / 2m + 2xm tg α |
Hub root diameter: flat bottom of groove round bottom of groove | D f | D f = D D fmin = D + 0.44m |
Displacement of basic profile | x m | x m = 1/2 (D-m N - 1.1m) |
Shaft root diameter: flat bottom of groove round bottom of groove | d f | d fmax = D - 2.2m d fmax = D - 2.76m |
Shaft outside diameter: centering to the tooth side centering to the outside | d a | d a = D - 0.2m d a = D |
Hub tooth chamfering or fillet diameter | K | K = 0.15m |
Pitch | p | p = π m |
Number of teeth | N | - |
Basic diameter | d b | d b = m N cos α |
Hub tooth height | H | H = H a + H f |
Addendum | H a | H a = 0.45m |
Shaft addendum for flat bottom of groove for round bottom of groove | h f | h fmin = 0.55m h fmin = 0.65m h f = 0.83m |
Shaft pitch width of tooth | s | s = π / 2m + 2xm tg α |
Nominal diameter of splining | D | D = m N + 2xm +1.1m |
Hub outside diameter | D a | Da = D - 2m |
Radial clearance | c | c min = 0.1m |
Diameter of circle of limit points of hub tooth sides | D 1 | D 1imin = d a + F T |
Diameter of circle of limit points of shaft tooth sides | d 1 | d 1imax = D a + F T |
Splining diameter | D d | - |