Contents

 1   A Helpful Guideline to the Manual

 2   Registration
    2.1   How to Register
    2.2   Login for Registered Users
    2.3   Lost Your Password?

 3   Project Manager
    3.1   User Properties
    3.2   Project Management
    3.3   Message Window
    3.4   The Button ‘Refresh’
    3.5   File Info
    3.6   Time Account
    3.7   Save Files Locally
    3.8   How to Leave the Program

 4   General Functions
    4.1   Top Menu Bar
    4.2   Opening a Calculation from the eAssistant Server
    4.3   Opening a Calculation From Your Computer
    4.4   Saving a Calculation to the eAssistant Server
    4.5   Saving a Calculation to Your Computer
    4.6   The Button ‘Calculate’
    4.7   The Button ‘Redo’ and ‘Undo’
    4.8   The Button ‘CAD’
    4.9   The Button ‘Report’
    4.10   The Button ‘Options’
    4.11   The Button ‘Help’
    4.12   Message Window
    4.13   Quick Info: Tooltip
    4.14   How to Change the Unit of Measurement
    4.15   Automatic Dimensioning Functions (Calculator Button)
    4.16   User-Defined Inputs
    4.17   The Button „Question Mark“
    4.18   Calculation Results
    4.19   Template File

 5   Shafts with Strength According to DIN 743
    5.1   Start the Calculation Module
    5.2   The Geometry Part
    5.3   General Functions
    5.4   2D and 3D View
    5.5   Toolbar
    5.6   Message Window
    5.7   Quick Info
    5.8   Calculation Part
    5.9   Documentation: Calculation Report
    5.10   How to Save the Calculation
    5.11   How to Change the Unit of Measurement
    5.12   The Button ‘Redo’ and ‘Undo’
    5.13   The Button ‘CAD’
    5.14   The Button ‘Options’
    5.15   Calculation Examples: Shaft According to DIN 743

 6   Rolling Bearings According to DIN ISO 281
    6.1   Start the Calculation Module
    6.2   General Inputs
    6.3   Selection of Manufacturer and Bearing Type
    6.4   Specification of Bearing Load
    6.5   Nominal Rating Life
    6.6   Expanded Modified Rating Life
    6.7   Bearing Selection
    6.8   Message Window
    6.9   Quick Info: Tooltip
    6.10   Calculation Results
    6.11   Documentation: Calculation Report
    6.12   How to Save the Calculation
    6.13   The Button ‘Redo’ and ‘Undo’
    6.14   The Button ‘Options’
    6.15   Calculation Examples: Rolling Bearing According to DIN ISO 281

 7   Spur Gear Pair Calculation According to DIN 3990 and Other Standards
    7.1   Start the Calculation Module
    7.2   Input of Geometry Data
    7.3   Input of Tool Data
    7.4   Input for the Determination of Allowances
    7.5   Representation of Gear Tooth Form
    7.6   Calculation of Gear Load Capacity
    7.7   Input of Gear Tooth Profile and Gear Flank Modifications
    7.8   Meshing Interferences for External Gears
    7.9   Internal Gears
    7.10   Input of Geometry Data for Internal Gears
    7.11   Manufacturing Process for Internal Gears
    7.12   Meshing Interferences for Internal Gears
    7.13   eAssistant: Examples for Internal Gears
    7.14   Message Window
    7.15   Quick Info: Tooltip
    7.16   Calculation Results
    7.17   Documentation: Calculation Report
    7.18   How to Save the Calculation
    7.19   ‘Redo’ and ‘Undo’ Button
    7.20   The Button ‘CAD’
    7.21   The Button ‘Options’
    7.22   How to Calculate the Accurate Tooth Form of Involute Splines

 8   Straight and Helical Bevel Gears According to ISO 23509
    8.1   Start Calculation Module
    8.2   Basic Configuration of a Bevel Gear Pair
    8.3   Input of Tool Data
    8.4   Input of Geometry Data
    8.5   Input of Data for the Gear Body
    8.6   Input of Data for the Determination of Tolerances and Backlash
    8.7   Calculation of Load Capacity of Straight and Helical Bevel Gears
    8.8   Message Window
    8.9   Quick Info: Tooltip
    8.10   Calculation Results
    8.11   Documentation: Calculation Report
    8.12   How to Save the Calculation
    8.13   The Button ‘Redo’ and ‘Undo’
    8.14   ‘CAD’ Button
    8.15   The Button ‘Options’

 9   Spiral Bevel Gears According to Klingelnberg KN 3028 and ISO 23509
    9.1   Start Calculation Module
    9.2   Basic Configuration of Bevel Gear Pair
    9.3   Input of Tool Data
    9.4   Input of Geometry Data
    9.5   Input of Data for the Gear Body
    9.6   Input of Data for the Determination of Tolerances and Backlash
    9.7   Calculation of Load Capacity of Spiral Bevel Gears
    9.8   Message Window
    9.9   Quick Info: Tooltip
    9.10   Calculation Results
    9.11   Documentation: Calculation Report
    9.12   How to Save the Calculation
    9.13   The Button ‘Redo’ and ‘Undo’
    9.14   ‘CAD’ Button
    9.15   The Button ‘Options’

 10   Interference Fit According to DIN 7190
    10.1   General Information
    10.2   Application
    10.3   Selection of Fit/Tolerances
    10.4   Automatic Dimensioning Functions (Calculator Button)
    10.5   Influence of Centrifugal Force
    10.6   Additional External Loads
    10.7   Operating Factor (Application Factor)
    10.8   Coefficients of Friction
    10.9   Stepped Hub Geometry
    10.10   Subsidence/Surface Smoothing
    10.11   Modification of Diameter
    10.12   Fretting Corrosion
    10.13   Assembly and Disassembly
    10.14   Example of Interference Fits
    10.15   How to Change the Unit of Measurement
    10.16   The Button ‘Redo’ and ‘Undo’
    10.17   Material Selection
    10.18   Message Window
    10.19   Quick Info: Tooltip
    10.20   Calculation Results
    10.21   Documentation: Calculation Report
    10.22   How to Save the Calculation
    10.23   The Button ‘Options’
    10.24   Calculation Example: Interference Fit According to DIN 7190

 11   Parallel Key Calculation According to DIN 6892
    11.1   General
    11.2   Scope of DIN 6892
    11.3   Types of Parallel Keys
    11.4   Surface Pressure
    11.5   Permitted Surface Pressure
    11.6   Application factor
    11.7   Load Factor
    11.8   Load Distribution Factor
    11.9   Friction Factor
    11.10   Load Direction Changing Factor
    11.11   Load Peak Frequency Factor
    11.12   Support Factor
    11.13   Hardness Influence Factor
    11.14   Inputs for Calculation Method B
    11.15   Some Additional Information On Method C
    11.16   Automatic Dimensioning Functions (Calculator Button)
    11.17   Material Selection
    11.18   Selection and Geometry of Parallel Keys
    11.19   Input of Individual Parallel Keys
    11.20   How to Change the Unit of Measurement
    11.21   The Button ‘Redo’ and ‘Undo’
    11.22   Message Window
    11.23   Quick Info: Tooltip
    11.24   Calculation Results
    11.25   Documentation: Calculation Report
    11.26   How to Save the Calculation
    11.27   The Button ‘Options’
    11.28   Calculation Example: Parallel Key According to DIN 6892

 12   Involute Splines, Serrated Shaft and Splined Shaft Connection According to Niemann
    12.1   Start the Calculation Module
    12.2   Profile Geometry Selection
    12.3   How to Change the Unit of Measurement
    12.4   Application Factor
    12.5   Load Peaks
    12.6   Kind of Load
    12.7   Stepped Hub
    12.8   Material Selection for Shaft and Hub
    12.9   Message Window
    12.10   Quick Info: Tooltip
    12.11   Calculation Results
    12.12   Documentation: Calculation Report
    12.13   How to Save the Calculation
    12.14   Automatic Dimensioning Functions (Calculator Button)
    12.15   The Button ‘Redo’ and ‘Undo’
    12.16   The Button ‘CAD’
    12.17   Options
    12.18   Calculation Example: Splined Shaft for Lifting Gear

 13   Bolts and Pins
    13.1   Start the Calculation Module
    13.2   Kind of Connection
    13.3   Pin Types
    13.4   Material Selection
    13.5   Application Factor
    13.6   Message Window
    13.7   Calculation Results
    13.8   Documentation: Calculation Report
    13.9   How to Save the Calculation
    13.10   The Button ‘Redo’ and ‘Undo’
    13.11   The Button ‘Options’

 14   Compression Springs According to DIN EN 13906-1-2002
    14.1   Start the Calculation Module
    14.2   General Information
    14.3   Input Possibilities
    14.4   Spring Geometry Selection
    14.5   Material Selection
    14.6   How to Change the Unit of Measurement
    14.7   The Button ‘Redo’ and ‘Undo’
    14.8   Message Window
    14.9   Quick Info: Tooltip
    14.10   Calculation Results
    14.11   Diagrams
    14.12   Documentation: Calculation Report
    14.13   How to Save the Calculation
    14.14   The Button ‘Options’
    14.15   Calculation Example: Compression Spring According to DIN EN 13906-1, Edition 2002

 15   Tension Springs According to DIN EN 13906-2-2002
    15.1   Start the Calculation Module
    15.2   General Information
    15.3   Input Possibilities
    15.4   Material Selection
    15.5   Spring end types
    15.6   How to Change the Unit of Measurement
    15.7   Message Window
    15.8   Quick Info: Tooltip
    15.9   The Button ‘Redo’ and ‘Undo’
    15.10   Calculation Results
    15.11   Diagrams
    15.12   Documentation: Calculation Report
    15.13   How to Save the Calculation
    15.14   The Button ‘Options’

 16   Tolerance Fit Calculator DIN ISO 286, Edition 1990
    16.1   Selection of Fits
    16.2   Calculation of Possible Fits
    16.3   Example for Cylindrical Fits
    16.4   Further Possibilities

 17   Hardness Conversion According to DIN 50150: 2000-10
    17.1   Kind of Material
    17.2   Hardness Values
    17.3   Further Possibilities

 18   Approximate Shaft Dimensioning According to Niemann 2001
    18.1   Material Selection
    18.2   Material Number
    18.3   Load Types
    18.4   Further Possibilities

 19   Rough Estimation of Bolted Joints According to VDI 2230 Sheet 1 (2003-02)
    19.1   Axial Load
    19.2   Transverse Load
    19.3   Strength Grade
    19.4   Load Introduction
    19.5   Tightening Technique
    19.6   Preload
    19.7   Further Possibilities