About Fit Tolerance ISO
Limits, fits and tolerances calculator has been developed to calculate engineering tolerances of inner and outer features of journal bearings, linear bearings, thrust bearings, bushings, ball bearings, roller bearings,...
Limits, fits and tolerances calculator has been developed to calculate engineering tolerances of inner and outer features of journal bearings, linear bearings, thrust bearings, bushings, ball bearings, roller bearings, housings, cylinder bores, drilled holes, linear and precision shafts, pistons, etc. The calculator works in line with ISO 286-1 (2010), ISO 286-2 (2010) and ANSI B4.2 (1978) standards which are based on metric units. According to the input parameters of nominal size and hole/shaft tolerances, size limits and deviations for hole/shaft are calculated and fit type is selected among the clearance, transition and interference fits. The schematic representation of the fit is also drawn. The preferred tolerances and fits advised by ISO and ANSI standards can be found in the "Supplements" section.
Version History On screen keyboard for nominal size is now a numpad with a decimal separator. Minor updates and improvements. 3.0 Jan 15 On screen keyboard for nominal size switched to alphanumeric to enable user to input decimal separator. 2.2 12/15/2025 UI is modernized. Minor updates and improvements. 2.1 12/02/2025 Bug fixes and performance improvements. 1.7 11/01/2023 Bug fixes and performance improvements. 1.5 05/09/2022 Minor updates and improvements. 1.4 03/10/2021 Minor updates and improvements. 1.3 11/03/2020 Minor updates and improvements. 1.2 03/14/2019 Minor updates and improvements. 1.1 06/19/2018 1.0 06/29/2017
Previous Versions
Here you can find the changelog of Fit Tolerance ISO since it was posted on our website on 2025-06-30 21:35:34.
The latest version is 3.0 and it was updated on 2026-10-14 10:40:48. See below the changes in each version.
Fit Tolerance ISO version 3.0
Updated At: 2026-10-14
Changes: Version History On screen keyboard for nominal size is now a numpad with a decimal separator.
Minor updates and improvements. 3.0 Jan 15 On screen keyboard for nominal size switched to alphanumeric to enable user to input decimal separator. 2.2 12/15/2025 UI is modernized.
Minor updates and improvements. 2.1 12/02/2025 Bug fixes and performance improvements. 1.7 11/01/2023 Bug fixes and performance improvements. 1.5 05/09/2022 Minor updates and improvements. 1.4 03/10/2021 Minor updates and improvements. 1.3 11/03/2020 Minor updates and improvements. 1.2 03/14/2019 Minor updates and improvements. 1.1 06/19/2018 1.0 06/29/2017
Fit Tolerance ISO version 3.0
Updated At: 2026-01-15
Changes: On screen keyboard for nominal size is now a numpad with a decimal separator.
Minor updates and improvements.
Fit Tolerance ISO version 1.7
Updated At: 2023-11-01
Changes: Nov 1, 2023
Version 1.7
Bug fixes and performance improvements.
Disclaimer
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