| Deutsch

Z A R 5

Software for Planetary Gearing Design

(C) Copyright 2000-2020 by HEXAGON Software, Berlin

Bases for Calculation

The ZAR5 planetary gearing calculation program calculates the geometry and strength of sun, planet and ring gear (spur or helical, involute teeth) according to ISO 6336, ISO 1328, DIN 3960, 3961, 3967 and 3990. ZAR5 calculates the tooth contact for gear pair sun-planet and planet-ring gear.


At Pre-Dimensioning, ZAR5 creates a planet gear, after you entered input/output speeed and power .


Pressure angle, helix angle, normal module or diametral pitch, number of teeth, face width, addendum modification coefficients, center distance, addendum reduction may be edited and optimized at dimensions dialogue window.

Special Profiles

To enable users to optimize gear trains with extra-depth gearing, the program allows the tool dimensions of normal and protuberance profiles to be defined freely, with and without tip edge breakage.


ZAR5 calculates all gear data, tool dimensions, tooth thickness, flank clearance, backlash, span width, dimension over/between pins and balls, tolerances and permissible errors according to ISO 1328 or DIN 3961.

Strength calculation

The load-bearing capacity with respect to tooth root fatigue fracture and pitting can be calculated for gear pairs sun-planet and planet-ring gear in conformance with either ISO 6336 or DIN 3990 Parts 1 to 3 or DIN 3990 Part 41 (Vehicle transmission). A diagram displays safety factors and life expectation as function of torque.

Kutzbach Chart

The Kutzbach chart displays the speed vectors and relative speed.

Wolf Chart

The gear chart to Wolf shows the torque distribution to the 3 shafts (2 difference shafts and 1 sum shaft), as well as the relative transmission coefficients.


An animation simulates the cinematics of the planetary gear on screen. Another animation shows the tooth contact sun-planet and planet-ring gear.

Manufacturing drawing

You can generate a drawing with tables of all production data for sun, planet and ring gear. Drawings may be exported as DXF or IGES files, or be printed on every Windows printer.

Production sheet

Another production sheet contains manufacturing data and dimension in pre-machined and finished condition.

Quick View

Quick View shows tables with most essential data of the planetary gearing.

Roller Bearing Calculation

If planet wheels are to be mounted with roller bearings, ZAR5 calculates life expectation of groove ball bearings, self-aligning ball bearings, needle bushes, needle bearings, cylindrical roller bearings, tapered roller bearings and self-aligning roller bearings by means of the database files delivered with the software.

Multistage Planetary Gear

Enter transmission ratio and number of stages for pre-dimensioning of a multi stage planetary gear.

CAD Interface

DXF and IGES interfaces allow ZAR5 to be linked to CAD and DTP systems. ZAR5 generates drawings of the front and side elevation of the gears calculated, plus tables containing the gear data and dimensions.
The tooth shape with involutes and envelopes can be calculated precisely and plotted out in CAD. A single tooth, the tooth space, the complete gear, gear-generating tool, planetary gear train and a sectional view of the tooth action can be displayed on the screen or output as a CAD drawing.

Database for materials and tooth profiles

ZAR5 contains databases with material data and tool profiles, that may be extended and modified by the user.

Load Spectrum
ZAR5 allows you to define a load collective, and calculate the application factors, with a life expectancy diagram.

System Requirements
ZAR5 is available as 32 bit and 64 bit application for Windows 10, Windows 8, Windows 7. If the CAD facility is to be used, the system used must be equipped with a DXF or IGES interface.

Scope of Delivery
The ZAR5 package consists of CD-ROM or zip file containing ZAR5 program, files with application examples, help text and auxiliary image files, manualwith installation instructions, program description and examples of application, License agreement for an indefinite period of time.

Information and Update Service
HEXAGON Software is continuously improved and updated. Licensed users can obtain new versions at the update price. Each program is provided with an individual license number and user files. No extra charge is made to registered users for support by email and hotline use.

HEXAGON guarantees for a period of 24 months that the software will fulfil the functions described.

Download ZAR5 Demo for Windows (869 kB)

Pricelist | Order | E-Mail | Home