Iso 2768 Hole Tolerance Chart

intellilaserq.netlify.app › Iso 2768 Hole Tolerance Chart ▆ ▆

This document specifies possible manufacturing tolerances for plastic moulded parts. This document specifies all integral features with general tolerances with surface profile tolerance within a specified datum system. It allows for additional specifications in case of functional needs and requirements using the ISO-GPS-tools for dimensional. General tolerance ISO 2768 does not specify where to use these tolerance. As per design requirements and manufacturing capability tolerance class is defined. For example: For sheet metal parts ISO 2768–mk is used. And for machined components ISO 2768–fh can be used. In above example “m” and “k” has defined the tolerance class.

General ISO Geometrical Tolerances Per. ISO 2768

The following are general geometrical tolerances per. ISO 2768 for the following:

Linear Dimensions
External Radius and Chamfer Heights
Straightness and Flatness
Perpendicularity
Symmetry
Runout

Related Mechanical Tolerance Design Data

Variations on dimensions without tolerance values are according to ' ISO 2768'. All tolerance limits are given in mm.

ISO 2768 and derivative geometrical tolerance standards are intendedto simplify drawing specifications for mechanical tolerances. ISO 2768 is mainly for parts that are manufactured by way of machining or removal of materials.

Linear Dimensions:

Permissible deviations in mm for ranges in nominal lengths	f (fine)	Tolerance class designation (description)		v (very coarse)
	f (fine)	m (medium)	c (coarse)	v (very coarse)
0.5 up to 3	±0.05	±0.1	±0.2	-
over 3 up to 6	±0.05	±0.1	±0.3	±0.5
over 6 up to 30	±0.1	±0.2	±0.5	±1.0
over 30 up to 120	±0.15	±0.3	±0.8	±1.5
over 120 up to 400	±0.2	±0.5	±1.2	±2.5
over 400 up to 1000	±0.3	±0.8	±2.0	±4.0
over 1000 up to 2000	±0.5	±1.2	±3.0	±6.0
over 2000 up to 4000	-	±2.0	±4.0	±8.0

External Radius and Chamfer Heights

Permissible deviations in mm for ranges in nominal lengths	f (fine)	Tolerance class designation (description)		v (very coarse)
	f (fine)	m (middle)	c (coarse)	v (very coarse)
0.5 up to 3	±0.2	±0.2	±0.4	±0.4
over 3 up to 6	±0.5	±0.5	±1.0	±1.0
over 6	±1.0	±1.0	±2.0	±2.0

Angular Dimensions

Permissible deviations in degrees and minutes for ranges in nominal lengths	f (fine)	Tolerance class designation (description)		v (very coarse)
	f (fine)	m (middle)	c (coarse)	v (very coarse)
up to 10	±1º	±1º	±1º30'	±3º
over 10 up to 50	±0º30'	±0º30'	±1º	±2º
over 50 up to 120	±0º20'	±0º20'	±0º30'	±1º
over 120 up to 400	±0º10'	±0º10'	±0º15'	±0º30'
over 400	±0º5'	±0º5'	±0º10'	±0º20'

Straightness and Flatness

Ranges in nominal lengths in mm	Tolerance class
Ranges in nominal lengths in mm	H	K	L
up to 10	0.02	0.05	0.1
over 10 up to 30	0.05	0.1	0.2
over 30 up to 100	0.1	0.2	0.4
over 100 up to 300	0.2	0.4	0.8
over 300 up to 1000	0.3	0.6	1.2
over 1000 up to 3000	0.4	0.8	1.6

Perpendicularity

Ranges in nominal lengths in mm	Tolerance class
Ranges in nominal lengths in mm	H	K	L
up to 100	0.2	0.4	0.6
over 100 up to 300	0.3	0.6	1
over 300 up to 1000	0.4	0.8	1.5
over 1000 up to 3000	0.5	0.8	2

Symmetry (Position for ISO G&T Standard not-ASME or ANSI GD&T)

Efficient Indoor Comfort. EverRest brand gas furnaces can deliver warm, money-saving indoor comfort year after year to your home. Variable and multi-speed furnaces can provide enhanced indoor comfort by slowly ramping up to your thermostat setting rather than simply turning on at full speed. Everest extreme comfort furnace manual.

Ranges in nominal lengths in mm	Tolerance class
Ranges in nominal lengths in mm	H	K	L
up to 100	0.5	0.6	0.6
over 100 up to 300	0.5	0.6	1
over 300 up to 1000	0.5	0.8	1.5
over 1000 up to 3000	0.5	1	2

Run-Out

Tolerance class
H	K	L
0.1	0.2	0.5

Related Resources:

Home
Engineering Book Store
Engineering Forum
Excel App. Downloads
Online Books & Manuals
Engineering News
Engineering Videos
Engineering Calculators
Engineering Toolbox
GD&T Training Geometric Dimensioning Tolerancing
DFM DFA Training
Training Online Engineering
Advertising Center