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The hole basis fits have four preferred hole tolerances (H11, H9, H8, and H7); the shaft basis fits have four preferred shaft tolerances (h11, h9, h7, and h6) as shown in Table 6-1. The above shaft tolerances are now covered in the new ANSI B32.100-2005 standard.
ISO Tolerances for Shafts (I SO 286-2) Nominal Shaft Sizes (mm) over 3 6 10 18 30 40 50 65 80 100 120 140 160 180 200 225 250 280 315 355 inc. 6 10 18 30 40 50 65 80 100 120 140 160 180 200 225 250 280 315 355 400 micrometres a12-270-390-280-430-290-470-300-510-310-560-320-570-340-640-360-660
Size limit charts for H & h devaitions (Metric and Inch) according to ISO 286-1:2010
⎯ Part 1: Basis of tolerances, deviations and fits ⎯ Part 2: Tables of standard tolerance classes and limit deviations for holes and shafts
The document provides tolerance specifications for inside dimensions (holes) of parts in various nominal size ranges. It lists the acceptable upper and lower tolerance limits in thousandths of a millimeter for holes within different diameter ranges between 0-500mm.
The first provides the charts for the fundamental deviations (G, j, etc.) and tolerance grades (7, 8, 9, etc.), out of which the limits of the tolerance classes (H7, g6, etc.) can be calculated. ISO 286-2 is a collection of dozens of charts that tabulate the size limits for all the tolerance grades.
The document provides tolerance specifications for hole dimensions in metric units. It lists nominal size ranges in millimeters along with allowed tolerances in thousandths of a millimeter for various dimension codes depending on the nominal size range.
