Fit Tolerance ISO vs Mechanical Engineering Toolkit Usage & Stats
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.
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Mechanical Engineering Toolkit is a professional engineering calculator for all students and researchers at university and college and industrial engineers. This toolkit provides engineering equations/formulas calculation, instructions, and reference material. Get the calculation result just by choosing a formula and entering the required variables.
The following categories are available:
1. Mechanics of Material:
• Moments of inertia of plane areas
• Force-displacement relation of bar
• Moments of inertia of plane areas
• Torsion formula of bar
• Flexure formula of beam
• Deflections and slopes of cantilever beams
• Deflections and slopes of simple beams
• Plane stresses transformation
• Principal stresses and plane
• Stresses in the wall of a spherical shell
• Stresses in a thin-walled cylindrical pressure vessel
• Buckling load of column
2. Theory of Elasticity
• Constitutive relation of linear elastic material
• Stress/strain of linear elastic material
3. Composite Material
• Lamina stress/strain
• Lamina engineering constants
• Laminate stress/strain
• Laminate plane properties
• Laminate 3D properties
• Rule of mixtures
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Fit Tolerance ISO VS. 
Mechanical Engineering ToolkitMarch 24, 2025