Fit Tolerance

FitTolerance is an engineering tool that helps you perform tolerance and fit calculations based on the ISO 286 standard. You can quickly analyze shaft–hole fits, evaluate clearance or interference conditions, and review basic bearing information with clear, practical results.

The app is designed for mechanical engineers, technicians, CNC operators, toolmakers, and maintenance teams who need fast access to reliable technical data in the workshop, on site, or in the office.

Key features

• ISO 286 tolerance calculator
• Shaft and hole fit analysis
• Standard tolerance combinations (e.g., H7/g6)
• Bearing types and essential technical information
• Clear and easy-to-read results
• Modules that can work without an internet connection

Where it can be used

• Design and production workflows
• Pre-assembly fit checks
• Measurement verification during manufacturing
• Technical reference and training purposes

FitTolerance helps you reach the right values without navigating complex tables. Calculations are based on widely accepted engineering standards to support accurate and consistent decision-making in daily work.

Recent changes:
A complete refresh:
• Original technical drawings for every product family (bearings, seals, housings, sleeves, hydraulic profiles)
• Easy search by shaft diameter or product code; matching housing, seal and sleeve selection
• Share your selected set as a PDF with dimensions, load/speed ratings and lubrication tips
• 6 technical catalogs in-app with search
• Complete translations in 20 languages
• New splash screen and performance improvements