Cylindrical worms with globoid gear

• Cylindrical worm gear pairs according to DIN 3975 with 90° shaft angle
• Consideration of different flank forms in the load capacity calculation, flank
• forms ZA, ZK, ZN, ZI/ZE and ZC
• Calculation of the complete geometry data of worm and worm wheel with axial module, centre distance, pressure angle, lead angle, profile shift for the worm wheel, etc.
• Input of pressure and lead angle in decimal degree or in degree, minute and second
• Calculation of the geometry with normal module instead of axial module is possible, any modules can be entered including several decimal places
• Alternative input for axial or normal module as Diametral and Circular Pitch
• Dimensiong function for the facewidth of the worm or the rim width of the worm wheel
• Individual specification of the centre distance and automatic calculation of the lead angle, also possible the other way round
• Dimensioning function for the throat radius
• Calculation of the diameter/centre distance ratio and diametral factor, recommended values via help function
• Standardized basic rack profiles for tools according to ISO 53, DIN 867 and DIN 3972 can be selected or individually specified
• Tooth quality and tooth thickness tolerances according to DIN 3974
• Calculation of tooth thickness allowances, three-wire measure for the worm, ball measurement for worm wheel, individual input of centre distance allowances for worm/wheel pairing
• Calculation of normal and circumferential backlash
• Calculation of load capacity according to DIN 3996, ISO/TR 14521 and Niemann with integrated material and lubricant database
• Individual specification of the lubricant factor
• Calculation of tooth root and tooth flank safety, temperature safety and minimum safety against wear and deflection
• Calculation of power losses or individual specification of power losses
• Calculation of the gear efficiency
• Transverse contact ratio
• Unit switch between metric and U.S. customary unit system, unit switching function also for single parameters
• Detailed calculation report in HTML and PDF format

This module allows an easy and fast calculation of the geometry and load capacity of cylindrical worm gear pairs with a globoid worm wheel and an axis angle of 90°. Different flank shapes such as ZA, ZK, ZN, ZI/ZE as well as ZC can be selected for the calculation. For the geometry calculation, for example, axial or normal module, number of teeth, pressure angle, profile shift, lead angle can be entered. The axial module can be entered for the geometry calculation, but it is also possible to perform the calculation with the normal module. The calculation is possible with any module, even with several decimal places.

Various standardized basic rack profiles for tools according to ISO 53, DIN 867 and DIN 3972 are available for the calculation. The user can also define the tool profile individually. Tooth thickness allowances and centre distance dimensions can be easily selected via corresponding listboxes. Furthermore, the test dimensions for the gear teeth are determined. The software automatically calculates the required number of the teeth for span measurement and the diameter of the ball/pin. Optionally, these values can also be defined individually.

In addition to the geometry calculation, the load capacity calculation is also available, either according to DIN 3996 Method B, ISO/TR 14521 Method B or Niemann. The safeties for the tooth root and tooth flank (tooth break and pitting) are calculated and the temperature safety and safety against deflection and wear are also determined.

The gear efficiency and the total efficiency are also calculated. The calculation of the load capacity also takes into account various power losses or these can be specified by a user input. Lubricants and materials are available for selection in the integrated databases, but can also be defined individually by the user for the calculation.

Numerous dimensioning and help functions support the user during the calculation. This calculation module contains the redo/undo functionality as well as the report function for HTML and PDF calculation reports.