KISSsoft 2026
Sketcher
SP 1 - Annotation improvements
Several minor issues with annotations have been improved. The data update between annotations and element editor has also been improved.
SP 1 - Mirroring face gears
Mirroring face gears is now possible.

Forced Response Gears
SP 1 - Forced response analysis of the gear mesh outputs in the time domain
Forced response analysis of the gear mesh outputs in the time domain is shown based on the last running speed.

Gears
SP 1 - Bold print variant solution in gear sizing results
Bold print indicator fixed for gear sizing result tables.
SP 1 - Considering tooth contact stiffness from tooth form in load spectrum
Tooth contact stiffness from tooth form is now considered correctly in the load spectrum calculation.
SP 1 - Gear body overlaps with gear geometry in the 3D viewer.
Fix of the overlap of the gear body and the gear geometry in the 3D viewer (in gear calculation, shaft calculation and KISSdesign).
SP 1 - Input of temperature in the load spectrum
The input field for the temperature in the load spectrum table is now shown correctly.
SP 1 - Material properties of Duracon M90-44 from Polyplastics
Root fatigue data is added for plastic material Duracon M90-44 from Polyplastics. Some general material properties are also updated.
SP 1 - Rounding for number of teeth
Double value for number of teeth is rounded instead of truncated for the integer setting for the number of teeth.
SP 1 - The oil viscosity graph is shown correctly for small viscosity values
The oil viscosity graph was now correctly drawn even when the oil viscosity is smaller than 10.

Cylindrical Gears Rating
SP 1 - Improvement in the calculation of YCHD and ZCHD factors calculated according to FVA 271
YCHD and ZCHD factors calculated according to FVA 271 now properly consider the min/max hardening depth defined by the user.
SP 1 - Influence of alternating bending on the flank safety factor
Tooth flank load spectrum setting "Calculate both cases and document the unfavorable case" works correctly in cases that YM factor for all gears is set to 1.0.
SP 1 - Scuffing results in the special Load spectrum report
Scuffing results per bin are now shown again in the special load spectrum report.

Cylindrical Gears Contact Analysis
SP 1 - Comments added back to contact analysis graphics
The texts in the contact analysis graphics were missing and now are available in the comments window.
SP 1 - Legends added back to contact analysis graphics
The legends were missing from the contact analysis 2D graphics and are now added back.
SP 1 - Number of pitches is set based on pitch error
If the "Own input" is not selected for resolution, the number of pitches used in the contact analysis will always be 1, if there is no pitch error, and 2, if there is pitch error. Previously it didn't revert back to 1 when pitch error was removed.

Cylindrical Gears Geometry
SP 1 - Pinion type cutter dimension in tab Tooth form
Pinion type cutter dimension in tab Tooth form were not drawn correctly in case a full rounding or chamfer was set.
SP 1 - Profile diagram shows individual modification curves properly
Profile diagram shows individual modification curves properly when the axis settings is set to roll angle, diameter and rotation angle.
SP 1 - Step export of a planetary system that contains a planet carrier
Improved stability of the software during the step export of a planetary system that contains a planet carrier.
SP 1 - Tool drawing with dimensions
Several improvements were made to the tool dimension drawing.

Globoid Worm Gears
SP 1 - The user input for J0T coefficient
The user input J0T coefficient for wear calculation is now saved in the calculation file.

Shafts
SP 1 - Calculation of factor KWK,RS according to FKM
Formula for the calculation of factor KWK,RS to estimate the fatigue limit of surface treated components according to FKM has been corrected.
SP 1 - Internal message for beams fixed in shaft editor
Internal RotCAD message for beams has been fixed in the shaft editor.
SP 1 - KAK factor was calculated with maximum equivalent stress instead of the equivalent stress per load bin
The KAK factor per load bin was calculated with the maximum equivalent stress σmv and τmv instead of the equivalent stress per load bin.
SP 1 - Shaft solver convergence
Convergence of shaft solver for classic bearing calculation has been improved for some cases.
SP 1 - Update of a gear calculation file connected to a shaft calculation file
Improvement for the case a shaft calculation file reads the gear data from a gear calculation file and something changes in this gear calculation file.

Bearings
SP 1 - Fatigue load limit for custom rolling bearing read from the file
Fatigue load limit Cu for custom rolling bearing, whose data was read from the calculation file, was not considered in the calculation of modified reference rolling bearing lifetime. Instead, internally calculated fatigue load limit was used.
SP 1 - Rolling bearing damage for single load level and lifetime from load spectrum
When calculation with single load level and lifetime from load spectrum is chosen, rolling bearing damage calculation now considers lifetime from chosen load bin (before nominal required service lifetime was considered).
SP 1 - Rolling bearing lifetime calculation with single bin calculation
Rolling bearing lifetime calculation for single bin with the lubricant temperature defined individually per bin has been improved.
SP 1 - Rolling bearing table structure
The structure of the rolling bearing table has been improved.