Enter a nominal diameter for a hole or shaft and select a grade to view upper and lower tolerances. Calculate tolerances for diameters up to 500 mm in metric or 19.685 inches in imperial. Display values based on ISO 286 standards.
by gary davies★ 5.01 ratingsProductivity$0.99Data updated 2026-09-06
Provides calculators for speeds and feeds, milling, lathe, drilling, and trigonometry. Includes reference materials for machining formulas and tool performance optimization. Users can access essential engineering resources and calculations on-the-go.
Allows users to input outside diameter, roll center, yield, and Young's modulus to calculate in inches or millimeters. It includes a unit selector for imperial or metric conversion. Users can view past calculations through the History feature.
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