LIMITS, FITS AND TOLERANCES CALCULATOR (ISO SYSTEM)

Fits and tolerance calculator for shaft and hole according to ISO 286-1 and ANSI B4.2 metric standards . The schematic representation of the fit is also drawn.

The tolerances defined in ISO 286-1 are applicable to size range from 0 mm to 3150 mm but there are exceptional cases defined in the standard which depend on tolerance selection. If the calculation results given by the calculator are "---", then this means the input parameters are not applicable according to ISO standard.

Limits, Fits and Tolerance Calculator:

INPUT PARAMETERS
Parameter	Value		Unit
Nominal Size			mm
Hole Tolerance	A B C CD D E EF F FG G H JS J K M N P R S T U V X Y Z ZA ZB ZC	01 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18	---
Shaft Tolerance	a b c cd d e ef f fg g h js j k m n p r s t u v x y z za zb zc	01 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18	---

Note : Use dot "." as decimal separator.

Please Wait... 

RESULTS
HOLE
Parameter	Value	Unit
Designation	---	---
Hole Upper Deviation	---	μm (0.001mm)
Hole Lower Deviation	---	μm (0.001mm)
Maximum Hole Size	---	mm
Minimum Hole Size	---	mm
SHAFT
Parameter	Value	Unit
Designation	---	---
Shaft Upper Deviation	---	μm (0.001mm)
Shaft Lower Deviation	---	μm (0.001mm)
Maximum Shaft Size	---	mm
Minimum Shaft Size	---	mm
FIT
Parameter	Value	Unit
Designation	---	---
Fit Type	---	---
Maximum Clearance	---	μm (0.001mm)
Minimum Clearance	---	μm (0.001mm)

Definitions:

Nominal size: The size of a feature of perfect form as defined by the technical drawing.

Deviation: The difference between a size and the corresponding nominal size.

Upper deviation: The difference between the maximum limiting size and the corresponding nominal size of a feature.

Lower deviation: The difference between the minimum limiting size and the corresponding nominal size of a feature.

Tolerance: The difference between the maximum and minimum size limits of a part.

Clearance Fit: A fit type where clearance exists between assembled parts under all tolerance conditions.

Interference Fit: A fit type where interference exists between assembled parts under all tolerance conditions.

Transition Fit: A fit type where clearance or interference can exist between assembled parts depending on tolerance conditions.

GD&T A means of dimensioning and tolerancing a part with respect to relationship and function of that part. GD&T is used to define how a part feature relates the other part features in the same part or in a mating part; it’s a way to dimension and tolerance with respect to part’s function, the way it works.

Supplements:

• Limits, fits and tolerances (ISO and ANSI Systems)
• Interference (press & shrink) fit calculator
• Preferred Fits and Tolerances Charts (ISO)
• Precision Measuring Tools For Shaft and Hole Measurements

Other Languages:

• Limits, Fits and Tolerances Calculator in German.
• Limits, Fits and Tolerances Calculator in French.

Reference:

• ISO 286-1 (2010) Geometrical product specifications (GPS) - ISO code system for tolerances on linear sizes - Part 1: Basis of tolerances, deviations and fits
• ISO 286-2 (2010) Geometrical product specifications (GPS) - ISO code system for tolerances on linear sizes - Part 2: Tables of standard tolerance classes and limit deviations for holes and shafts
• ANSI/ASME B4.2 (1978) Preferred Metric Limits and Fits