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Status : Active
Standard Type : Main
Document No : ISO 4156-2:2021
Document Year : 2021
Pages : 374
Edition : 2
Section Volume : Shafts for machinery and accessories (ISO/TC 14.)
Limiting dimensions, tolerances, manufacturing errors and their effects on the fit between connecting coaxial spline elements are defined and tabulated. Linear dimensions are expressed in millimetres and angular dimensions in degrees.
The specified diameters for external splines in the geometry tables and the values in the inspection dimension tables are only valid for fundamental deviation "h".
For fundamental deviations other than "h", diameters and tooth thicknesses are calculated for external splines according to the formulae in ISO 4156-1 and inspection dimensions according to the formulae in ISO 4156-3.