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About
This tool quickly calculates ISO 286 limits and fits for holes and shafts. It helps engineers determine minimum and maximum sizes, clearance, and fit types for design, machining, and inspection.
✓Calculate hole and shaft limit sizes
✓Determine minimum and maximum clearance
✓Classify fit types (clearance, transition, interference)
✓Compare multiple fits
✓Reverse fit selection
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What's New in MetroX ISO Fit Calculator
1.0.6
February 17, 2026
Bug fixes and improvements.
1
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$2.99
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FAQ
Does MetroX support clearance and interference fits?
Yes, MetroX calculates the minimum and maximum clearance or interference for both clearance and interference fits. It also automatically classifies the fit type.
Can I start from a target clearance in MetroX?
Yes, MetroX offers a reverse workflow that allows you to pick a fit based on your target clearance or interference range.
Who is the target audience for MetroX?
MetroX is designed for mechanical engineers, machinists, toolmakers, inspectors, and students who work with ISO 286 standards.
What devices is MetroX compatible with?
MetroX is available for iPhone, iPad, and iPod devices.
What is the age rating for MetroX?
MetroX has an age rating of +4, making it suitable for a wide range of users.
How frequently is MetroX updated?
The latest version of MetroX is 1.0.6, and it was last updated on February 17, 2026. Updates ensure the app remains reliable and functional.
Does MetroX have ads?
No, MetroX is ad-free, providing an uninterrupted user experience for calculations.
Is MetroX free to use?
Yes, MetroX is available for free, with optional in-app purchases for additional features or content.
