Contents

 1   A helpful guideline to the eAssistant manual

 2   The registration
    2.1   How to register
    2.2   The login for registered users
    2.3   Forgot your password?

 3   The project manager
    3.1   The project manager - a general overview
    3.2   The user properties
    3.3   The project management
    3.4   The message window in the project manager
    3.5   The button ‘Refresh’
    3.6   The file info
    3.7   The time account
    3.8   Save files locally
    3.9   How to leave the program

 4   The general functions
    4.1   How to open a calculation from a calculation module
    4.2   How to save a calculation
    4.3   The button ‘Calculation’
    4.4   The button ‘Undo’
    4.5   The button ‘Redo’
    4.6   The button ‘CAD’
    4.7   The button ‘Report’
    4.8   The button ‘Options’
    4.9   The button ‘Help’
    4.10   The message window in the calculation module
    4.11   The quick info
    4.12   How to change the unit of measurement
    4.13   The dimensioning functions
    4.14   The user-defined inputs
    4.15   The button „Question mark“
    4.16   The results
    4.17   The template file

 5   The shaft calculation with strength according to DIN 743
    5.1   The general information
    5.2   The geometry part
    5.3   The general functions
    5.4   The 2D / 3D view
    5.5   The toolbar
    5.6   The message window
    5.7   The calculation part
    5.8   The documentation: The calculation report
    5.9   How to save the calculation
    5.10   The button ‘Redo’ and ‘Undo’
    5.11   The button ‘CAD’
    5.12   The button ‘Options’
    5.13   The button ‘Help’
    5.14   The first calculation example
    5.15   The second calculation example

 6   The roller bearing calculation according to DIN ISO 281
    6.1   Start the calculation module
    6.2   General
    6.3   The selection of manufacturer and bearing type
    6.4   The specification of bearing load
    6.5   The expanded modified rating theory
    6.6   The bearing selection
    6.7   The message window
    6.8   The calculation results
    6.9   The diagrams
    6.10   The documentation: The calculation report
    6.11   How to save the calculation
    6.12   The button ‘Redo’ and ‘Undo’
    6.13   The button ‘Options’
    6.14   Example: The roller bearing calculation according to DIN ISO 281

 7   Interference fit according to DIN 7190
    7.1   General information
    7.2   Application
    7.3   Selection of fit/tolerances
    7.4   The dimensioning
    7.5   The influence of the centrifugal force
    7.6   Additional external loads
    7.7   The operating factor (application factor)
    7.8   The coefficients of friction
    7.9   The stepped hub geometry
    7.10   The subsidence/the surface smoothing
    7.11   The modification of diameter
    7.12   The menu item ‘Options’
    7.13   Fretting corrosion
    7.14   Assembly and disassembly
    7.15   Example of interference fits
    7.16   Example: Interference fit calculation according to DIN 7190

 8   Parallel key calculation according DIN 6892
    8.1   General
    8.2   The field of application of DIN 6892
    8.3   Geometry
    8.4   The loads
    8.5   Hints for method C
    8.6   Example: Parallel keys according to DIN 6892

 9   Involute splines, serrated shaft and splined shaft connection according to Niemann
    9.1   Start the calculation module
    9.2   Profile geometry selection
    9.3   Change the unit of measurement
    9.4   Load peaks
    9.5   Kind of load
    9.6   The stepped hub
    9.7   Material shaft and hub
    9.8   The message window
    9.9   The calculation results
    9.10   The documentation: The calculation report
    9.11   How to save the calculation
    9.12   The dimensioning functions
    9.13   The button ‘Redo’ and ‘Undo’
    9.14   The button ‘CAD’
    9.15   The options
    9.16   The calculation example: Splined shaft connection for a lifting gear drive

 10   Spur gear pair calculation according to DIN 3990 and other standards
    10.1   Start the calculation module
    10.2   Input of geometry data
    10.3   Input of tool data
    10.4   Input for the determination of allowances
    10.5   Representation of the tooth form
    10.6   The load capacity of the gearing
    10.7   Meshing interferences for external gears
    10.8   The message window
    10.9   The calculation results
    10.10   The documentation: The calculation report
    10.11   How to save the calculation
    10.12   The button ‘Redo’ and ‘Undo’
    10.13   The button ‘CAD’
    10.14   The button ‘Options’
    10.15   The internal gears
    10.16   Input of geometry data for internal gears
    10.17   Manufacturing process for internal gears
    10.18   Meshing interferences for internal gears
    10.19   Examples for internal gears in the eAssistant
    10.20   How to calculate the accurate tooth form of involute splines

 11   Compression spring according to DIN EN 13906-1, edition 2002
    11.1   Start the calculation module
    11.2   The input possibilities
    11.3   The spring geometry selection
    11.4   The material selection
    11.5   The message window
    11.6   The calculation results
    11.7   The diagrams
    11.8   The documentation: The calculation report
    11.9   How to save the calculation
    11.10   The button ‘Redo’ and ‘Undo’
    11.11   The button ‘Options’
    11.12   Example: Compression spring according to DIN EN 13906-1, edition 2002

 12   Tension spring according to DIN EN 13906-2, edition 2002
    12.1   Start the calculation module
    12.2   The input possibilities
    12.3   The material selection
    12.4   The spring end types
    12.5   The message window
    12.6   The calculation results
    12.7   The diagrams
    12.8   The documentation: The calculation report
    12.9   How to save the calculation
    12.10   The button ‘Redo’ and ‘Undo’
    12.11   The button ‘Options’

 13   Tolerance fit calculator DIN ISO 286, edition 1990
    13.1   The selection of fits
    13.2   The calculation of possible fits
    13.3   Example for cylindrical fits
    13.4   Futher possibilities

 14   Hardness conversion according to DIN 50150: 2000-10
    14.1   Kind of material
    14.2   Hardness values
    14.3   Further possibilities

 15   Approximate shaft dimensioning according to Niemann 2001
    15.1   The material selection
    15.2   The material number
    15.3   The load types
    15.4   Further possibilities