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W N 5

Software for Involute Splines according to ISO 4156 and ANSI B92.2M

(C) Copyright 2001-2024 by HEXAGON, Berlin


WN5 calculates dimensions, tolerances, dimension over pins, stress and life expectation for Involute Splines according to ISO 4156 and ANSI B92.2M. Basically, WN5 uses metric units. Imperial units inch, psi, lb-in, can be configured as well. WN5 calculates the fit types "Flat Root Side Fit" and "Fillet Root Side Fit". Pressure angle can be 30, 37.5 or 45.

Flank Clearance, Tolerances

WN5 calculates tolerances for diameters, space width and tooth thickness according to ISO 4156 and ANSI B92.2M from Fit Class and Spline Tolerance Class. When entering centerline runout of internal and external spline, WN5 calculates required effective clearance.


WN5 calculates dimension over pins, span measurement and tooth thickness. Pin diameter and number of teeth measured may be changed.

Stress Calculation

WN5 calculates compressive stress, spline teeth shear stress, hoop stress, bending stress, torsional stress, and equivalent stress according to "SAE Design Guide for Involute Splines". Material, application factors and life expectation coefficients can be entered directly, or calulated by WN5.

Production Drawing

Drawing tables with spline dimension data according to ISO 4156 or ANSI B92.2M together with a spline draft may be printed or loaded with CAD via DXF-/IGES interface.

Tooth Profile Drawing

WN5 generates true-scale drawings of internal and external involute spline as DXF/IGES files for CAD Import.

Hard- and Software requirements

WN5 is available as 32-bit or 64-bit application for Windows 11, Windows 10, Windows 7.

Scope of Delivery

WN5 program, user manual (pdf), license for unlimited time use.


HEXAGON gives a 24 month guarantee on full functionality of the software.

Information and Update Service

HEXAGON Software is continuously improved and updated. Customers are regularly informed about updates and new editions.

© ISO: International Standards Organisation
© SAE: Society of Automotive Engineers, Inc.
© ANSI: American National Standards Institute

Download WN5 Demo (682 kB)

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