EN ISO 1302:2002

SLOVENSKI STANDARD
01-maj-2004
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Geometrical Product Specifications (GPS) - Indication of surface texture in technical
product documentation (ISO 1302:2002)
Geometrische Produktspezifikationen (GPS) - Angabe der Oberflächenbeschaffenheit in
technischen Produktdokumentationen (ISO 1302:2002)
Spécification géométrique des produits (GPS) - Indication des états de surface dans la
documentation technique de produits (ISO 1302:2002)
Ta slovenski standard je istoveten z: EN ISO 1302:2002
ICS:
01.110 7HKQLþQDGRNXPHQWDFLMD]D Technical product
L]GHONH documentation
17.040.20 Lastnosti površin Properties of surfaces
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 1302
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2002
ICS 01.100.20; 17.040.20
English version
Geometrical Product Specifications (GPS) - Indication of surface
texture in technical product documentation (ISO 1302:2002)
Spécification géométrique des produits (GPS) - Indication Geometrische Produktspezifikation (GPS) - Angabe der
des états de surface dans la documentation technique de Oberflächenbeschaffenheit in der technischen
produits (ISO 1302:2002) Produktdokumentation (ISO 1302:2002)
This European Standard was approved by CEN on 17 January 2002.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2002 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 1302:2002 E
worldwide for CEN national Members.

CORRECTED  2002-04-10
Foreword
This document (ISO 1302:2002) has been prepared by Technical Committee ISO/TC 213
"Dimensional and geometrical product specifications and verification" in collaboration with
Technical Committee CEN/TC 290 "Dimensional and geometrical product specification and
verification", the secretariat of which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of
an identical text or by endorsement, at the latest by August 2002, and conflicting national
standards shall be withdrawn at the latest by August 2002.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium, Czech
Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg,
Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of the International Standard ISO 1302:2002 has been approved by CEN as a
European Standard without any modifications.
NOTE Normative references to International Standards are listed in annex ZA (normative).
Annex ZA
(normative)
Normative references to international publications
with their relevant European publications
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions of
any of these publications apply to this European Standard only when incorporated in it by
amendment or revision. For undated references the latest edition of the publication referred to
applies (including amendments).
NOTE Where an International Publication has been modified by common modifications, indicated
by (mod.), the relevant EN/HD applies.
Publication Year Title EN Year
ISO 3098-2 2000 Technical product documentation - EN ISO 3098-2 2000
Lettering - Part 2: Latin alphabet,
numberal and marks
ISO 3274 1996 Geometrical product specifications EN ISO 3274 1997
(GPS) - Surface texture: Profile method
- Nominal characteristics of contact
(stylus) instruments
ISO 4287 1997 Geometrical product specifications EN ISO 4287 1998
(GPS) - Surface texture: Profile method
- Terms, definitions and surface texture
para meters
ISO 4288 1996 Geometrical product specifications EN ISO 4288 1997
(GPS) - Surface texture: Profile method
- Rules and procedures for the
assessment of surface texture
ISO 8785 1998 Geometrical product specification EN ISO 8785 1999
(GPS) - Surface imperfections - Terms,
definitions and parameters
ISO 11562 1996 Geometrical product specifications EN ISO 11562 1997
(GPS) - Surface texture: Profile method
- Metrological characteristics of phase
correct filters
ISO 12085 1996 Geometrical product specification EN ISO 12085 1997
(GPS) - Surface texture: Profile method
- Motif parameters
ISO 13565-1 1996 Geometrical product specifications EN ISO 13565-1 1997
(GPS) - Surface texture: Profile
method; surfaces having stratified
functional proper ties - Part 1: Filtering
and general measurement conditions
ISO 13565-2 1996 Geometrical product specifications EN ISO 13565-2 1997
(GPS) - Surface texture: Profile
method; surfaces having stratified
functional properties - Part 2: Height
characterization using the linear
material ratio curve
ISO 13565-3 1998 Geometrical Product Specifications EN ISO 13565-3 2000
(GPS) - Surface texture: Profile
method; surfaces having stratified
functional properties - Part 3: Height
characterization using the material
probability curve
ISO 14253-1 1998 Geometrical Product Specifications EN ISO 14253-1 1998
(GPS) - Inspection by measurement of
workpieces and measuring equipment -
Part 1: Decision rules for proving
conformance or non-conformance with
specifications
ISO 14660-1 1999 Geometrical Product Specifications EN ISO 14660-1 1999
(GPS) - Geometrical features - Part 1:
General terms and definitions
ISO 81714-1 1999 Design of graphical symbols for use in EN ISO/IEC 11714-1 1999
the technical documentation of
products - Part 1: Basic rules
INTERNATIONAL ISO
STANDARD 1302
Fourth edition
2002-02-01
Geometrical Product Specifications
(GPS) — Indication of surface texture in
technical product documentation
Spécification géométrique des produits (GPS) — Indication des états de
surface dans la documentation technique de produits

Reference number
ISO 1302:2002(E)
©
ISO 2002
ISO 1302:2002(E)
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ii © ISO 2002 – All rights reserved

ISO 1302:2002(E)
Contents Page
Foreword.iv
Introduction.v
1 Scope .1
2 Normative references.1
3 Terms and definitions .2
4 Graphical symbols for the indication of surface texture.3
5 Composition of complete graphical symbol for surface texture.5
6 Indication of surface texture parameters.6
7 Indication of manufacturing method or related information.11
8 Indication of the surface lay .12
9 Indication of machining allowance.14
10 Summarizing of indications of surface texture requirements and their values.14
11 Position on drawings and other technical product documentation.14
Annex A (normative) Proportions and dimensions of graphical symbols.20
Annex B (informative) Synoptive tables .23
Annex C (informative) Examples of indication of surface texture requirements .26
Annex D (informative) Minimum indications for unambiguous control of surface functions.30
Annex E (informative) Surface texture parameter designations .33
Annex F (informative) Evaluation length, ln.36
Annex G (informative) Transmission band and sampling length.37
Annex H (informative) Consequences of new ISO surface texture standards .39
Annex I (informative) Former practice .41
Annex J (informative) Relation to the GPS matrix model .44
Bibliography.46

ISO 1302:2002(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO
member bodies). The work of preparing International Standards is normally carried out through ISO technical
committees. Each member body interested in a subject for which a technical committee has been established has
the right to be represented on that committee. International organizations, governmental and non-governmental, in
liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical
Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3.
The main task of technical committees is to prepare International Standards. Draft International Standards adopted
by the technical committees are circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
International Standard ISO 1302 was prepared by Technical Committee ISO/TC 213, Dimensional and geometrical
product specifications and verification.
This fourth edition cancels and replaces the third edition (ISO 1302:1992), which has been technically revised.
Annex A forms a normative part of this International Standard. Annexes B, C, D, E, F, G, H, I and J are for
information only.
iv © ISO 2002 – All rights reserved

ISO 1302:2002(E)
Introduction
This International Standard is a geometrical product specification (GPS) standard and is to be regarded as a
general GPS standard (see ISO/TR 14638). It influences link 1 of the chain of standards on roughness, waviness
and primary profile.
For more detailed information of the relation of this International Standard to other standards and the GPS matrix
model, see annex J.
This edition of ISO 1302 has been developed for use together with the new editions of the surface texture
standards issued in 1996 and 1997, which introduce many radical changes compared with the content of the
former surface texture standards issued in the 1980s. The changes are so radical that the drawing indications in
some instances have a completely new interpretation. Annex H gives detailed information on these changes.
Drawing indications applied on technical drawings according to former editions of this International Standard refer
to the rules given in the surface texture standards issued at the time of issue and can only be interpreted according
to those surface texture standards. Annex I provides information on former practices.
The drawing indications given in this edition are to be used for the unambiguous reference to the new surface
texture standards issued in 1996 and 1997.
Textual indications in this edition of ISO 1302 are under continuous development within ISO/TC 213 and a
separate, detailed standard on this issue is under preparation. Consequently, the textual indications given may
change in future editions of ISO 1302.

INTERNATIONAL STANDARD ISO 1302:2002(E)

Geometrical Product Specifications (GPS) — Indication of surface
texture in technical product documentation
1 Scope
This International Standard specifies the rules for the indication of surface texture in technical product
documentation (e.g. drawings, specifications, contracts, reports) by means of graphical symbols and textual
indications.
It is applicable to the indication of requirements for surfaces by means of
a) profile parameters, according to ISO 4287, related to the
 R-profile (roughness parameters),
 W-profile (waviness parameters), and
 P-profile (structural parameters),
b) motif parameters, according to ISO 12085, related to the
 roughness motif, and
 waviness motif,
c) parameters related to the material ratio curve according to ISO 13565-2 and ISO 13565-3.
NOTE For the indication of requirements for surface imperfections (pores, scratches etc.), which cannot be specified using
surface texture parameters, reference is made to ISO 8785, which covers surface imperfections.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of
this International Standard. For dated references, subsequent amendments to, or revisions of, any of these
publications do not apply. However, parties to agreements based on this International Standard are encouraged to
investigate the possibility of applying the most recent editions of the normative documents indicated below. For
undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC
maintain registers of currently valid International Standards.
1)
ISO 129-1:— , Technical drawings — Indication of dimensions and tolerances — Part 1: General principles
2)
ISO 1101:— , Geometrical Product Specifications (GPS) — Geometrical tolerancing — Tolerancing of form,
orientation, location and run-out

1) To be published. (Revision of ISO 129:1985)
2) To be published. (Revision of ISO 1101:1983)
ISO 1302:2002(E)
ISO 3098-2:2000, Technical product documentation — Lettering — Part 2: Latin alphabet, numerals and marks
ISO 3274:1996, Geometrical Product Specifications (GPS) — Surface texture: Profile method — Nominal
characteristics of contact (stylus) instruments
ISO 4287:1997, Geometrical product specifications (GPS) — Surface texture: Profile method — Terms, definitions
and surface texture parameters
ISO 4288:1996, Geometrical product specifications (GPS) — Surface texture: Profile method — Rules and
procedures for the assessment of surface texture
ISO 8785:1998, Geometrical product specifications (GPS) — Surface imperfections — Terms, definitions and
parameters
3)
ISO 10135:— , Technical drawings — Simplified representation of moulded, cast and forged parts
ISO 10209-1:1992, Technical product documentation — Vocabulary — Part 1: Terms relating to technical
drawings: general and types of drawings
ISO 11562:1996, Geometrical Product Specifications (GPS) — Surface texture: Profile method — Metrological
characteristics of phase correct filters
ISO 12085:1996, Geometrical product specifications (GPS) — Surface texture: Profile method — Motif parameters
ISO 13565-1:1996, Geometrical Product Specifications (GPS) — Surface texture: Profile method; Surfaces having
stratified functional properties — Part 1: Filtering and general measurement conditions
ISO 13565-2:1996, Geometrical Product Specifications (GPS) — Surface texture: Profile method; Surfaces having
stratified functional properties — Part 2: Height characterization using the linear material ratio curve
ISO 13565-3:1998, Geometrical Product Specifications (GPS) — Surface texture: Profile method; Surfaces having
stratified functional properties — Part 3: Height characterization using the material probability curve
ISO 14253-1:1998, Geometrical Product Specifications (GPS) — Inspection by measurement of workpieces and
measuring equipment — Part 1: Decision rules for proving conformance or non-conformance with specification
ISO 14660-1:1999, Geometrical Product Specifications (GPS) — Geometrical features — Part 1: General terms
and definitions
ISO 81714-1:1999, Design of graphical symbols for use in the technical documentation of products — Part 1: Basic
rules
3 Terms and definitions
For the purposes of this International Standard, the terms and definitions given in ISO 3274, ISO 4287, ISO 4288,
ISO 10209-1, ISO 11562, ISO 12085, ISO 13565-2, ISO 13565-3, ISO 14660-1 and the following apply.
3.1
basic graphical symbol
〈surface texture〉 graphical symbol indicating that a requirement for surface texture exists
See Figure 1.
3) To be published. (Revision of ISO 10135:1994)
2 © ISO 2002 – All rights reserved

ISO 1302:2002(E)
3.2
expanded graphical symbol
〈surface texture〉 expanded basic graphical symbol indicating that material is either to be removed or not removed
in order to obtain the specified surface texture
See Figures 2 and 3.
3.3
complete graphical symbol
〈surface texture〉 basic or expanded graphical symbol expanded in order to facilitate the addition of complementary
surface texture requirements
See Figure 4.
3.4
surface (texture) parameter
parameter expressing a micro-geometrical property of a surface
NOTE See annex E for examples of surface texture parameter designations.
3.5
(surface) parameter symbol
symbol indicating the type of surface texture parameter
NOTE The parameter symbols consist of letters and numerical values (e.g. Ra, Ramax, Wz, Wz1max, AR, Rpk, Rpq).
4 Graphical symbols for the indication of surface texture
4.1 General
Requirements for surface texture are indicated on technical product documentation by several variants of graphical
symbols, each having its own significant meaning. The graphical symbols specified in 4.2 and 4.3 shall be
supplemented with complementary surface texture requirements in the form of numerical values, graphical symbols
and text (see also clauses 5, 6, 7 and 8). Attention is drawn to the fact that, in particular instances, the graphical
symbols may be used alone to convey a special meaning on the technical drawing (see clause 11).
4.2 Basic graphical symbol
The basic graphical symbol shall consist of two straight lines of unequal length inclined at approximately 60° to the
line representing the considered surface, as shown in Figure 1. The basic graphical symbol in Figure 1 should not
be used alone (without complementary information). Its use shall be to provide collective indications as shown in
Figures 23 and 26.
If the basic graphical symbol is used with complementary, supplemental information (see clause 5), then no further
decision is required as to whether removal of material is necessary for obtaining the specified surface (see 4.3.1) or
whether removal of material is not permitted for obtaining the specified surface (see 4.3.2).

Figure 1 — Basic graphical symbol for surface texture
ISO 1302:2002(E)
4.3 Expanded graphical symbols
4.3.1 Removal of material required
If removal of material — for example, by machining — is required for obtaining the specified surface, a bar shall be
added to the basic graphical symbol, as shown in Figure 2.
The expanded graphical symbol in Figure 2 should not be used alone (without complementary information).

Figure 2 — Expanded graphical symbol indicating removal of material required
4.3.2 Removal of material not permitted
If removal of material is not permitted for obtaining the specified surface, a circle shall be added to the basic
graphical symbol, as shown in Figure 3. For special use of this expanded graphical symbol, see clause 10.

Figure 3 — Expanded graphical symbol indicating removal of material not permitted
4.4 Complete graphical symbol
When complementary requirements for surface texture characteristics have to be indicated (see clause 6), a line
shall be added to the longer arm of any of the graphical symbols illustrated in Figures 1 to 3, as shown in Figure 4.
4)
For use in the written text of — for example, reports or contracts — the textual indication for Figure 4, a) is APA ,
5) 6)
for b) it is MRR and for c) NMR .

a) any manufacturing process permitted b) material shall be removed c) material shall not be removed
Figure 4 — Complete graphical symbol
4.5 Graphical symbol for “all surfaces around a workpiece outline”
When the same surface texture is required on all surfaces around a workpiece outline (integral features),
represented on the drawing by a closed outline of the workpiece, a circle shall be added to the complete graphical
symbol illustrated in Figure 4, as shown in Figure 5.
Surfaces shall be indicated independently if any ambiguity may arise from the all around indication.

4) Any process allowed.
5) Material removal required.
6) No material removed.
4 © ISO 2002 – All rights reserved

ISO 1302:2002(E)
NOTE The outline on the drawing represents the six surfaces shown on the 3D-representation of the workpiece (the front
and rear surfaces not included).
Figure 5 — Surface texture requirement for all six surfaces represented by outline on workpiece
5 Composition of complete graphical symbol for surface texture
5.1 General
In order to ensure that a surface texture requirement is unambiguous, it may be necessary, in addition to the
indication of both a surface texture parameter and its numerical value, to specify additional requirements (e.g.
transmission band or sampling length, manufacturing process, surface lay and its orientation and possible
machining allowances). It may be necessary to set up requirements for several different surface texture parameters
in order that the surface requirements ensure unambiguous functional properties of the surface. For more details
see annex D.
5.2 Position of complementary surface texture requirements
The mandatory positions of the various surface texture requirements in the complete graphical symbol are shown in
Figure 6.
Figure 6 — Positions (a to e) for location of complementary requirements

The complementary surface texture requirements in the form of
 surface texture parameters,
 numerical values, and
 transmission band/sampling length,
shall be located at the specific positions in the complete graphical symbol in accordance with the following.
a) Position a — Single surface texture requirement
Indicate the surface texture parameter designation, the numerical limit value and the transmission
band/sampling length according to clause 6. To avoid misinterpretation, a double space (double blank) shall be
inserted between the parameter designation and the limit value.
ISO 1302:2002(E)
Generally, the transmission band or sampling length shall be indicated followed by an oblique stroke (/),
followed by the surface texture parameter designation, followed by its numerical value using one text string.
EXAMPLE 1 0,0025-0,8/Rz 6,8 (example with transmission band indicated).
EXAMPLE 2 -0,8/Rz 6,8 (example with only sampling length indicated).
Especially for the motif method, the transmission band shall be indicated, followed by an oblique stroke (/),
followed by the value of the evaluation length, followed by another oblique stroke, followed by the surface
texture parameter designation, followed by its numerical value.
EXAMPLE 3 0,008-0,5/16/R 10.
NOTE Generally, the transmission band is the wavelength range between two defined filters (see ISO 3274 and
ISO 11562) and, for the motif method, the wavelength range between two defined limits (see ISO 12085).
b) Position a and b — Two or more surface texture requirements
Indicate the first surface texture requirement at position “a” as in a). Indicate the second surface texture
requirement at position “b”. If a third requirement or more is to be indicated, the graphical symbol is to be
enlarged accordingly in the vertical direction, to make room for more lines. The position “a” and “b” are to be
moved upwards when the symbol is enlarged (see clause 6).
c) Position c — Manufacturing method
Indicate the manufacturing method, treatment, coatings or other requirements for the manufacturing process
etc. to produce the surface, for example, turned, ground, plated (see also clause 7).
d) Position d — Surface lay and orientation
Indicate the symbol of the required surface lay and the orientation, if any, of the surface lay, for example, “=”,
“X”, “M” (see also clause 8).
e) Position e — Machining allowance
Indicate the required machining allowance, if any, as a numerical value given in millimetres, see also clause 9.
6 Indication of surface texture parameters
6.1 General
The parameter designation and the associated numerical value, which shall be indicated, includes four items of
information essential for the interpretation of the requirement. These are
 which of the three surface profiles (R, W or P) is indicated,
 which characteristic of the profile is indicated,
 how many sampling lengths make up the evaluation length, and
 how the indicated specification limit shall be interpreted.
Three principal groups of surface texture parameters have been standardized for use in connection with the
complete symbol. The definitions of the parameters may be found in ISO 4287, ISO 12085, ISO 13565-2 and
ISO 13565-3, in accordance with Table 1.
6 © ISO 2002 – All rights reserved

ISO 1302:2002(E)
Table 1 — Overview of parameter types
Parameters
Profile Motif Material ratio curve
linear probability
R W P R W R R P
Designation See E.2 See E.2 See E.2 See E.3 See E.3 See See See
E.4.2 E.4.3 E.4.3
Evaluation length See F.2 See F.2 See F.2 See F.3 See F.3 See F.4 See F.4 See F.4
Tolerance limit See 6.4
Transmission band See G.2 See G.2 See G.2 See G.3 See G.3 See G.4 See G.4 See G.4
6.2 Indication of parameter designations
See annex E. If the parameter designations are indicated as in annex E, without modifiers, this means that the
default definition or the default interpretation of the specification limit (“16 %-rule”, see 4.2 and 4.3 of
ISO 4288:1996) is invoked. See 6.4 for an indication of the “max-rule” for the interpretation of the specification limit.
6.3 Indication of evaluation length, ln
6.3.1 General
If the parameter designation is indicated as shown in annex E, without modifiers, this implies that the requirement is
the default evaluation length, if it is defined in the pertinent standards.
In those cases where no default definition exists for the number of sampling lengths within the evaluation length,
the number of sampling lengths shall be added to the parameter designation in order to obtain an unambiguous
surface texture requirement.
6.3.2 Profile parameters (ISO 4287)
 R-profile
See F.2. If the number of sampling lengths within the evaluation length differs from the default number of five
(see 4.4 of ISO 4288:1996), it shall be indicated adjacent to the relevant parameter designation.
EXAMPLE Rp3 or Rv3 or Rz3 or Rc3 or Rt3 or Ra3 or ., RSm3, . (if an evaluation length of three sampling lengths
is desired).
 W-profile
See F.2. The number of sampling lengths shall always be indicated adjacent to the parameter designation of
waviness.
EXAMPLE Wz5 or Wa3.
 P-profile
See F.2. The sampling length for P parameters is equivalent to the evaluation length (see 3.1.9 of
ISO 4287:1997) and the evaluation length is equal to the length of the feature being measured (see 4.4 of
ISO 4287:1997). Consequently, the indication of the number of sampling lengths in the parameter designation
of structure parameters is not relevant.
ISO 1302:2002(E)
6.3.3 Motif parameters (ISO 12085)
See F.3. If the evaluation length differs from the default number of 16 mm, it shall be indicated between two oblique
strokes.
EXAMPLE 0,008-0,5/12/R 10
NOTE Attention is drawn to the fact that the evaluation length concept in the case of motif parameters has a meaning
different from that of other surface texture parameters in that the sampling length concept does not exist. Consequently,
indication of the number of sampling lengths in the parameter designation of motif parameters is not relevant.
6.3.4 Parameters based on material ratio curve (ISO 13565-2, ISO 13565-3)
 R-profile
See F.4. If the number of sampling lengths within the evaluation length differs from the default number of five
(see clause 7 of ISO 13565-1:1996), it shall be indicated adjacent to the relevant parameter designation.
EXAMPLE Rk8, Rpk8, Rvk8, Rpq8, Rvq8, Rmq8 (if an evaluation length of eight sampling lengths is desired).
For the R-profile parameters based on the linear material ratio curve according to ISO 13565-2 and
ISO 12085 — i.e. the parameters Rke, Rpke, Rvke, etc. — the indication of the evaluation length shall be
according to 6.3.3.
 P-profile
See F.4. The sampling length for P parameters is equivalent to the evaluation length (see 3.1.9 of
ISO 4287:1997) and the evaluation length is equal to the length of the feature being measured (see 4.4 of
ISO 4287:1997). Consequently, the indication of the number of sampling lengths in the parameter designation
of structure parameters is not relevant.
6.4 Indication of tolerance limits
6.4.1 General
There are two different ways of indicating and interpreting the specification limits of surface texture:
a) the “16 % rule”;
b) the “max-rule”.
See 5.2 and 5.3 of ISO 4288:1996, respectively.
The “16 %-rule” is defined as the default rule for all indications of surface texture requirements. This means that the
“16 %-rule” applies to a surface texture requirement when a parameter designation as shown in Annex E is applied
(see Figure 7). If the “max-rule” is to be applied to a surface texture requirement, “max” shall be added to the
parameter designation (see Figure 8). The “max-rule” does not apply to motif parameters.

a) in text b) on drawing
Figure 7 — Parameter indication where “16 %-rule” applies (default transmission band)
8 © ISO 2002 – All rights reserved

ISO 1302:2002(E)
a) in text b) on drawing
Figure 8 — Parameter indication where “max-rule” applies (default transmission band)
6.4.2 Profile parameters (ISO 4287)
The “16 %-rule” and the “max-rule” are both applicable to profile parameters defined in ISO 4287.
6.4.3 Motif parameters (ISO 12085)
The motif parameters are defined using only the “16 %-rule” (see 5.4 of ISO 12085:1996).
6.4.4 Parameters based on material ratio curve (ISO 13565-2, ISO 13565-3)
The “16 %-rule” and the “max-rule” are both applicable to parameters related to the material ratio curve defined in
ISO 13565-2 and ISO 13565-3.
6.5 Indication of transmission band and sampling length
6.5.1 General
Where no transmission band is indicated in connection with the parameter designation, the default transmission
band applies to the surface texture requirement (see annex G for the definition of default transmission bands; see
the surface texture requirements in Figures 7 and 8 for no transmission band indicated).
Certain surface texture parameters do not have a defined default transmission band, a default short-wave filter or a
default sampling length (long-wave filter). Consequently, the surface texture indication shall specify transmission
band, short-wave filter or long-wave filter to ensure that the surface texture requirement is unambiguous.
To provide assurance that the surface is controlled unambiguously by the surface texture requirement, the
transmission band shall be indicated in front of the parameter designation separated from it by an oblique stroke (/).
The transmission band shall be indicated by the inclusion of the cut-off values of the filters (in millimetres),
separated by a hyphen (“-”), the short-wave filter indicated first, and the long-wave filter second. See Figure 9.

a) in text b) on drawing
Figure 9 — Indication of transmission band in connection with surface texture requirement
In some cases, it may be relevant to indicate only one of the two filters in the transmission band. The second filter
then has its default value, if it exists. If only one filter is indicated, the hyphen is maintained to indicate whether the
indication is of the short-wave or the long-wave filter.
EXAMPLE 1 0,008- (short-wave filter indication).
EXAMPLE 2 -0,25 (long-wave filter indication).
ISO 1302:2002(E)
6.5.2 Profile parameters (ISO 4287)
 R-profile
See G.2. In the event of the transmission band being indicated, it may only be necessary to indicate the long-
wave filter λc (e.g. -0,8). The short-wave filter λs will then be as specified in 4.4 of ISO 3274:1996.
If control of both the short-wave filter and the long-wave filter in the transmission band for roughness
parameters is required, both shall be indicated in connection with the parameter symbol.
EXAMPLE 0,008-0,8
 W-profile
See G.2. The transmission band shall always be indicated by both cut-off values to ensure an unambiguous
requirement. The transmission band for waviness may be indicated, based on the default cut-off λc for surface
roughness according to ISO 4288, for the same surface (see Figure 10), by the expression λc - n ¥ λc, where
the number, n, is chosen by the designer.

a) in text b) on drawing
Figure 10 — Transmission band for waviness based on default cut-off λc for surface roughness
 P-profile
See G.2. The cut-off value of the short-wave filter λs shall always be indicated to ensure an unambiguous
requirement.
In the default case, P-parameters do not have any long-wave filters (sampling lengths). A long-wave filter
(sampling length) may be indicated for P-parameters if required for the function of the workpiece.
EXAMPLE -25/Pz 225
6.5.3 Motif parameters (ISO 12085)
 Roughness profile
See G.3. It is not necessary to indicate the evaluation length if its value is taken from ISO 12085:1996,
(Table 1) for the corresponding couple (λs, A). Nevertheless, the two oblique strokes shall be indicated.
If no limit for the short-wavelength is indicated, the default value is λs = 0,008 mm.
 Waviness profile
See G.3. Both limits A and B for the short-wavelength and the long-wavelength shall be indicated together.
It is not necessary to indicate the evaluation length if its value is issued from ISO 12085:1996, Table 1, for the
corresponding couple (A, B). Nevertheless, the two oblique strokes shall be indicated.
If no limit is indicated, the default values are A = 0,5 mm and B = 2,5 mm.
10 © ISO 2002 – All rights reserved

ISO 1302:2002(E)
6.5.4 Parameters based on the material ratio curve (ISO 13565-2, ISO 13565-3)
 R-profile
See G.4. Only the default and one non-default are standardized.
 P-profile
See G.4. If P-parameters are indicated according to ISO 13565-3, the short-wave filter λs shall be indicated in
connection with the parameter designation to ensure an unambiguous requirement.
In the default case, P-parameters do not have any long-wave filters (sampling lengths). A long-wave filter
(sampling length) can be indicated for P-parameters if required for the function of the workpiece.
6.6 Tolerance types — Unilateral or bilateral
6.6.1 General
The surface texture requirement shall be indicated as a unilateral or bilateral tolerance. The tolerance limits shall be
expressed by indication of the parameter designation, the parameter value and the transmission band as described
in 6.2, 6.3, 6.4 and 6.5.
6.6.2 Unilateral tolerance of a surface parameter
When the parameter designation, the parameter value and the transmission band are indicated, they shall be
understood as a unilateral upper tolerance limit of the parameter in question (“16 %-rule” or “max-rule” limit).
If the parameter designation, the parameter value and the transmission band indicated are to be interpreted as a
unilateral lower tolerance limit of the parameter in question (16 % or max. limit), then the parameter designation
shall be preceded by the letter L.
EXAMPLE L Ra 0,32
6.6.3 Bilateral tolerance of a surface parameter
A bilateral tolerance shall be indicated in the complete symbol by placing the requirement for the two tolerance
limits above each other, the upper specification limit (“16 %-rule” or “max-rule” limit) preceded by U being indicated
over the lower specification limit preceded by L (see Figure 11). Where the upper and lower limits are expressed by
the same parameter with different limit values, the U and L may be omitted provided the omission does not leave
any doubt.
The upper and lower specification limits are not necessarily expressed by means of the same parameter
designation and transmission band.

a) in text b) on drawing
Figure 11 — Bilateral surface specification
7 Indication of manufacturing method or related information
The surface texture parameter value of an actual surface is strongly influenced by the detailed form of the profile
curve. A parameter designation, parameter value and transmission band — indicated solely as a surface texture
requirement — do not therefore necessarily result in an unambiguous function of the surface. It is consequently
ISO 1302:2002(E)
necessary in almost all cases to state the manufacturing process, as this process to some extent results in a
particular detailed form of the profile curve.
There may also be other reasons for finding it appropriate to indicate the process.
The manufacturing process of the specified surface can be presented as text and added to the complete symbol as
shown in Figures 12 and 13. The coating in Figure 13 is, as an example, indicated using the symbolic presentation
in ISO 1456.
a) in text b) on drawing
Figure 12 — Indication of machining process and requirement for roughness of resulting surface

a) in text b) on drawing
Figure 13 — Indication of coating and roughness requirement
8 Indication of the surface lay
The surface lay and direction of the lay emanating from the manufacturing process (e.g. traces left by tools) may be
indicated in the complete symbol by using the symbols shown in Table 2 and illustrated by the example in
Figure 14. The indication of surface lay by the defined symbols (e.g. the perpendicularity symbol in Figure 14) is not
applicable to textual indications.

Figure 14 — Direction of lay of surface pattern indicated perpendicular to drawing plane
NOTE The direction of lay is the direction of the prevailing surface pattern, which is usually determined by the
manufacturing process used.
The symbols in Table 2 indicate the lay and direction of lay in relation to the drawing plane containing the surface
texture requirement.
12 © ISO 2002 – All rights reserved

ISO 1302:2002(E)
Table 2 — Indication of surface lay
Graphical
Interpretation and example
symbol
Parallel to plane of projection of view in which symbol is used
...