Green = "Prefered" tolerance classes per ISO 286; Find your data faster with our Fits and Tolerance Calculator; The Inch values shown in the table are conversion from the mertic values per ISO 286. you should expect about 0.1-0.5 thous errors wehn comparing with ANSI B4.1/4.2!

The following Engineering calculator will show the plus and minus tolerance for the specific ISO 286 hole tolerance data. Enter your desired preferred tolerance grade and the nomial size.

The most commonly used tolerancing system for shafts and holes is detailed in ISO 286-1 & 286-2. 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.

Calculation of fits and tolerances for shaft and hole per ISO 286-1 and ANSI B4.2. All tolerances classes and sizes according to standard.

Nominal hole sizes (mm) over 3

This part of ISO 286 gives values of the limit deviations for commonly used tolerance classes for holes and shafts calculated from the tables given in ISO 286-1. This part of ISO 286 covers values for the upper limit deviations ES (for holes) and es (for shafts), and the lower limit deviations EI (for holes) and ei (for shafts) (see Figures 1 ...

The following ISO Tolerance Chart for bolts and holes per ISO 286. These size charts do not compensate position or other GD&T location tolerances.

Tables of standard tolerance grades and limit deviations for holes and shafts. The tolerance of size is normally defined as the difference between the upper and lower dimensions.

ISO Tolerances for Holes (I SO 286-2) Nominal hole 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 E6 +28 +20 +34 +25 +43 +32 +53 +40 +66 +50 +79 + 60 +94 +72 +110 +85 +129 +100 +142 +110

The ISO System of Limits and Fits is a coordinated system of hole and shaft tolerances for engineering and manufacturing used for cutting tools, material stock, gages, etc. If held to these tolerances, cutting tools, material stock, and gages are generally available throughout the world.