Limits & Fits: ISO 286 Tables

ForestForge

About this app

Hole and shaft limits to 0.001 mm, without the fold-out table. Enter a size, pick the classes and read the limits.

• Any basic size up to 500 mm, with a nudge up or down
• Hole basis or shaft basis
• Pick the hole and shaft letter and IT grade, with a warning when a class doesn't exist for that size
• Ten preferred fits, from loose running clearance through transition to force and shrink fits
• Upper and lower limits and deviations for the hole and the shaft
• Maximum and minimum clearance or interference
• Zone diagram showing where the hole and shaft sit
• Go / no-go sizes and the usual process for each IT grade (grind, ream, turn, drill)
• Copy a shop card with the fit, the limits and the result
• Remembers your last fit. Metric or inch. No account needed and it works offline

Values from the ISO 286 tables. Check your drawing for the specified fit.

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Made by Forest Forge, an independent developer in the UK.

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