kSIST FprEN 1303:2025

SLOVENSKI STANDARD
oSIST prEN 1303:2024
01-maj-2024
Stavbno okovje - Profilni cilindri in Master-Key sistem (MKS) za ključavnice -
Zahteve in preskusne metode
Building hardware - Cylinders and Master-Key-Systems (MKS) for locks - Requirements
and test methods
Schlösser und Baubeschläge - Schließzylinder und Schließanlagen für Schlösser -
Anforderungen und Prüfverfahren
Quincaillerie pour le bâtiment - Cylindres de serrures et systèmes de fermeture
mécaniques - Prescriptions et méthodes d’essai
Ta slovenski standard je istoveten z: prEN 1303
ICS:
91.190 Stavbna oprema Building accessories
oSIST prEN 1303:2024 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN 1303:2024
oSIST prEN 1303:2024
DRAFT
EUROPEAN STANDARD
prEN 1303
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2024
ICS 91.190 Will supersede EN 1303:2015
English Version
Building hardware - Cylinders and Master-Key-Systems
(MKS) for locks - Requirements and test methods
Quincaillerie pour le batiment - Cylindres de serrures Baubeschläge - Schließzylinder und Schließanlagen
et systèmes de fermeture mécaniques - Prescriptions (SLA) für Schlösser - Anforderungen und
et méthodes d'essai Prüfverfahren
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 33.
If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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 CEN-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 1303:2024 E
worldwide for CEN national Members.

oSIST prEN 1303:2024
prEN 1303:2024 (E)
Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Requirements . 11
4.1 General. 11
4.2 Category of use — Key strength . 11
4.3 Durability . 11
4.4 Mechanical coding . 11
4.5 Suitability for use on fire resistant / smoke control doors . 11
4.6 Safety . 11
4.7 Corrosion resistance and operation at extreme temperatures . 11
4.7.1 Corrosion resistance . 11
4.7.2 Operation at extreme temperatures . 12
4.8 Key related security . 12
4.8.1 Minimum number of effective differs . 12
4.8.2 Minimum number of movable detainers . 12
4.8.3 Maximum number of identical steps . 12
4.8.4 Direct coding on key . 12
4.8.5 Operation of security mechanism (inter-passing . 12
4.8.6 Torque resistance of plug/cylinder relevant to key related security . 12
4.8.7 Manipulation resistance . 13
4.9 Attack resistance . 14
4.9.1 General. 14
4.9.2 Resistance to attack by drilling . 14
4.9.3 Resistance to attack by chisel . 14
4.9.4 Resistance to attack by twisting . 14
4.9.5 Resistance to attack by plug/cylinder extraction . 15
4.9.6 Torque resistance of plug/cylinder relevant to attack resistance . 15
5 Test – General and test apparatus . 15
5.1 General. 15
5.2 Test rigs and apparatus . 16
6 Test methods procedures . 16
6.1 General. 16
6.2 Key strength . 16
6.3 Durability tests — Standard test cycles . 17
6.4 Mechanical coding . 19
6.5 Suitable for use on fire resistance / smoke control doors . 19
6.6 Safety . 19
6.7 Corrosion resistance and test of operation at extreme temperatures . 19
6.7.1 Corrosion resistance . 19
6.7.2 Test of operation at extreme temperatures . 19
6.8 Key related security . 19
oSIST prEN 1303:2024
prEN 1303:2024 (E)
6.8.1 Minimum numbers of effective differs. 19
6.8.2 Minimum number of movable detainer . 19
6.8.3 Maximum number of identical steps . 19
6.8.4 Direct coding on key . 20
6.8.5 Operation of the security mechanism . 20
6.8.6 Torque resistance of plug and/or cylinder . 20
6.8.7 Manipulation resistance . 20
6.9 Attack resistance . 21
6.9.1 Resistance to drilling . 21
6.9.2 Resistance to attack by chisel . 22
6.9.3 Resistance to attack by twisting . 23
6.9.4 Resistance to attack by plug/cylinder extraction . 23
6.9.5 Torque resistance of plug/cylinder relevant to attack resistance . 27
7 Classification . 28
7.1 General . 28
7.2 Category of use (1st digit) . 28
7.3 Durability (2nd digit) . 28
7.4 Mechanical Coding (3rd digit) . 28
7.5 Suitable for use on fire resistant/smoke control doors (4th digit) . 28
7.6 Safety (5th digit) . 28
7.7 Corrosion resistance and temperature (6th digit) . 29
7.8 Key related security (7th digit) . 29
7.9 Attack resistance (8th digit) . 29
8 Marking . 29
Annex A (normative) Cylinders suitable for use on fire resistant/smoke control doors . 30
Annex B (informative) Tables of test sequence . 31
Annex C (informative) Product information . 32
Annex D (informative) Manufacturer’s declaration of compliance . 33
Annex E (informative) Comparison tables between EN 1303:2005 - EN 1303:2015 and EN
1303:2023 . 35
Annex F (normative) Cylinders suitable for use in locking systems . 36
Annex G (informative) Pulling screws to be used in plug extraction test . 40
Bibliography . 43

oSIST prEN 1303:2024
prEN 1303:2024 (E)
European foreword
This document (prEN 1303:2024) has been prepared by Technical Committee CEN/TC 33 “Doors,
windows, shutters, building hardware and curtain walling”, the secretariat of which is held by AFNOR.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 1303:2015.
In comparison with the previous edition, the following significant changes have been made:
a) the Scope has been extended to include cylinders suitable for use in locking systems, Master key
systems (MKS);
b) a new normative Annex F, Cylinders suitable for use in locking systems, has been added;
c) definitions related to MKS have been added;
d) requirements and evaluation methods for manipulation have been added;
e) classification (digit 3) has changed from Door mass to Mechanical coding;
f) the definition of ‘pulling screws’ has changed and an informative Annex G has been added;
g) figures have been renumbered.
The European Federation of Associations of Lock and Builders Hardware Manufacturers, ARGE,
collaborated in the drafting of this document.
oSIST prEN 1303:2024
prEN 1303:2024 (E)
Introduction
This document for mechanic locking cylinders and locking systems specifies requirements and test
methods for functionality, durability, environmental and security conditions for use on doors in buildings
or related to buildings.
The aim of the test methods described in this document is to keep human influence on the test results to
a minimum, thus improving reproducibility. This document does not specify any particular design or
installation.
Suitability for use on fire resistance or smoke control doors is not essential in every situation; the
manufacturer has the option to state if the cylinder conforms to these additional requirements according
to Annex A.
Requirements and procedures to achieve and maintain protection of data and sensitive information
related to mechanical Master Key Systems is given in CEN/TS 17814.
oSIST prEN 1303:2024
prEN 1303:2024 (E)
1 Scope
This document applies to cylinders and their keys for locks that are normally used in buildings and are
designed to be used with cylinders, where the locks have an operational torque of maximum 1,5 Nm.
This document specifies performance and other requirements for the strength, security, durability,
performance and corrosion resistance of cylinders and their original keys. It also specifies cylinders
suitable for use in locking systems, Master key systems (MKS).
It establishes one category of use, three grades of durability, two grades for mechanical coding (single
cylinders and MKS), three grades for fire and four grades corrosion resistance, all based on performance
tests, as well as thirteen grades of key related security based on design requirements and five grades on
performance tests that simulate attack.
This document includes tests of satisfactory operation at a range of temperatures. It specifies test
methods to be used on cylinders and their protective measures linked with these cylinders and
recommended by the manufacturer.
Corrosion resistance is specified by reference to the requirements of EN 1670 on corrosion resistance of
building hardware.
The suitability of cylinders for use on fire or smoke-door assemblies is determined by fire performance
tests conducted in addition to the performance testing required by this document. Since suitability for
use on fire doors is not essential in every situation, the manufacturer has the option to state if the cylinder
conforms to these additional requirements or not. If so claimed, cylinders will comply with the
requirements in Annex A.
Assessment of fire resistance and smoke control (grade A and grade B) is beyond the scope of this
document.
On occasions there can be a need for additional functions within the design of the cylinder. Purchasers
should satisfy themselves that the products are suitable for their intended use.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 636, Plywood — Specifications
EN 1634-1, Fire resistance and smoke control tests for door and shutter assemblies, openable windows and
elements of building hardware — Part 1: Fire resistance test for door and shutter assemblies and openable
windows
EN 1634-2, Fire resistance and smoke control tests for door, shutter and openable window assemblies and
elements of building hardware — Part 2: Fire resistance characterisation test for elements of building
hardware
EN 1634-3, Fire resistance and smoke control tests for door and shutter assemblies, openable windows and
elements of building hardware — Part 3: Smoke control test for door and shutter assemblies
EN 1670, Building hardware — Corrosion resistance — Requirements and test methods
EN 1906:2012, Building hardware — Lever handles and knob furniture — Requirements and test methods
oSIST prEN 1303:2024
prEN 1303:2024 (E)
EN 12164:2016, Copper and copper alloys — Rod for free machining purposes
ISO 10899, High-speed steel two-flute twist drills — Technical specifications
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp/
— IEC Electropedia: available at https://www.electropedia.org/
3.1
active moveable detainer
permutable blocking element, which needs to be in the aligned or shearline position in order to unblock
the cylinder and which may stay at least in one step before and in one step after the aligned or shearline
position where the cylinder stays in the blocked condition
3.2
cylinder
device, usually distinct from its associated lock or latch, operated by a key
3.3
cam
component of the cylinder to provide the movement to effect locking
3.4
central locking cylinder
locking system is a coded cylinder where a number of different keys operates this cylinder
3.5
central locking system
locking system which has only one level of coded keys operating different cylinders whereby all keys
operate central cylinders
Note 1 to entry: See Figure 1.
oSIST prEN 1303:2024
prEN 1303:2024 (E)
Key
1 individual key
2 locking cylinder
3 central locking cylinder
Figure 1— Example for a central locking system
3.6
direct code
marking on the key where the key steps can be determined without reference to another data source
3.7
effective differ
difference between cylinders of similar design, achieved only by the movable detainer, which allows each
cylinder to be operated only by its own key
3.8
grand master key system
GMK-system
locking system which has 3 or more levels of coded keys operating different cylinders
Note 1 to entry: See Figure 2.
Note 2 to entry: The combination of grand master key system with a central locking system is possible.
Note 3 to entry: Grand master key (GMK) operates all cylinders within a GMK system.
Note 4 to entry: Sub-master key (SMK) operates a defined group of cylinders within a GMK system.
Note 5 to entry: The combination of grand master key system with a central locking system 3.5 is possible.
oSIST prEN 1303:2024
prEN 1303:2024 (E)
Key
1 grand Master key
2 sub-Master Key (level 1)
3 sub-Master Key (level n)
4 individual keys locking cylinders
Figure 2 — Example of a (structured) Grand master key system
3.9
key
separate device corresponding to the cylinder, which can mechanically operate the cylinder
3.10
keyway
aperture extending along the whole or part of the length of the plug into which the key is inserted
3.11
legitimation ID
security protocol issued by the manufacturer of a locking system that indicates to the manufacturer a
reference to allow the holder to obtain additional keys, cylinders, lock chart, or locking system data
EXAMPLES
— Security card
— Security letter (document)
— Certificate of Eligibility
— Document of ownership
— Certificate of legitimation
— Electronic Legitimation
3.12
lock chart
describes the interaction with all keys and cylinders in the locking system
oSIST prEN 1303:2024
prEN 1303:2024 (E)
3.13
locking system
combination of different coded cylinders and keys that are functionally related to each other
3.14
master key system
MK-system
locking system which has 2 levels of coded keys operating different cylinders whereby the master key
can operate all cylinders
Note 1 to entry: See Figure 3.
Note 2 to entry: The combination of master key system with a central locking system 3.5 is possible.

Key
1 master key
2 individual key
3 locking cylinder
Figure 3 — Example for a master key system
3.15
moveable detainer
permutable part of the mechanism of a cylinder which should first be moved by the key into a pre-
determined position before the key and/or plug can move
3.16
passive moveable detainer
blocking elements, which needs to be in the aligned or shearline position to unblock the cylinder and
which may stay at least in one step before or alternatively in one step after the aligned or shearline
position where the cylinder stays in the blocked condition
3.17
plug
part of a cylinder that can be moved when the proper key is used
3.18
steps
characteristics of a key which operates movable detainers
oSIST prEN 1303:2024
prEN 1303:2024 (E)
4 Requirements
4.1 General
The structure of this clause reflects the classification in accordance with Clause 7.
Additional requirements for cylinders suitable for use in locking systems are defined in Annex F.
4.2 Category of use — Key strength
Cylinders and keys shall be designed for an operational maximum torque in the application of 1,5 Nm.
The key shall not break under the applied torque of 2,5 Nm.
After the test, the key shall be capable of being removed from the cylinder and re-used to operate the
same cylinder with a torque not exceeding 1,5 Nm.
Tested in accordance with 6.2.
4.3 Durability
It shall be possible to operate the cylinders with a new original key the number of test cycles specified in
Table 1.
Tested in accordance with 6.3.
Table 1 — Number of cycles
Durability Number of cycles
Grade 4 25 000
Grade 5 50 000
Grade 6 100 000
4.4 Mechanical coding
For grade 2 locking system, see Annex F.
4.5 Suitability for use on fire resistant / smoke control doors
The cylinder shall conform to the requirements of Annex A.
Verified in accordance with 6.5.
4.6 Safety
There is no requirement on the cylinder related to safety.
4.7 Corrosion resistance and operation at extreme temperatures
4.7.1 Corrosion resistance
It shall be possible to operate the cylinder with its proper key using a maximum torque of 1,5 Nm after
testing according to grade 3 of EN 1670.
This corrosion test shall apply to the functionality only.
No distinction is made between the inside and the outside of cylinder and/or door.
Tested in accordance with 6.7.1.
oSIST prEN 1303:2024
prEN 1303:2024 (E)
4.7.2 Operation at extreme temperatures
It shall be possible to operate the cylinder with its proper key using a maximum torque of 1,5 Nm at both
− 25 °C and + 65 °C.
Tested in accordance with 6.7.2.
4.8 Key related security
4.8.1 Minimum number of effective differs
The number of effective differs is equal to the number of theoretical differs after deduction of the differs
suppressed by the manufacturer due to technical constraints and those differs suppressed in accordance
with the restraints of 4.8.3.
The minimum number of effective differs shall be as indicated in Table 2.
The number of effective differs shall be verified in accordance with 6.8.1.
4.8.2 Minimum number of movable detainers
A movable detainer shall have minimum 3 permutable characteristics (position, layer, height or other
technical distinction).
The minimum number of movable detainers shall be as indicated in Table 2.
The number of movable detainers shall be verified in accordance with 6.8.2.
4.8.3 Maximum number of identical steps
The choice of key steps for movable detainer operation which have the same operating level shall be
restricted as indicated in Table 2.
Maximum identical adjacent key steps are allowed as indicated in Table 2.
The requirements are related to one row only of movable detainers.
The number of identical steps shall be verified in accordance with 6.8.3.
4.8.4 Direct coding on key
Direct key coding shall not be permitted on keys for the key related security grades 3 to 6 as specified in
Table 2.
4.8.5 Operation of security mechanism (inter-passing
For the key related security grades 1, 2 and 3, it shall not be possible before the durability test to operate
+0,2
the cylinder with the next closest key to its own key using a torque of 1,5 Nm .
For the key related security grades 4, 5 and 6, it shall not be possible before and after the durability test
+0,2
to operate the cylinders with the next closest key to its own key using a torque of 1,5 Nm .
Tested in accordance with 6.8.5.
4.8.6 Torque resistance of plug/cylinder relevant to key related security
It shall not be possible to rotate the plug and/or cylinder in the key related security grades 1 to 6, using
the specified applied torque as indicated in Table 2.
Tested in accordance with 6.8.6.
oSIST prEN 1303:2024
prEN 1303:2024 (E)
4.8.7 Manipulation resistance
4.8.7.1 Manipulation resistance
Requirement for manipulation resistance is applicable for key related security grades 4, 5 and 6. See
Table 2.
Tested in accordance with 6.8.7.1.
4.8.7.2 Deducible coding
It shall not be possible to deduce the coding of the cylinder by bringing its detainers to their end position.
When the detainers are brought to the compressed or end position a pattern shall not be recognizable
that is representative of the actual coding.
Requirement for is applicable for key related security grades 4, 5 and 6. See Table 2.
Tested in accordance with 6.8.7.2.
4.8.7.3 Manipulation of detainers by compression
It shall not be possible to open the cylinder by bringing all its detainers to or below the shearline.
Requirement is applicable for cylinders where compression is possible, key related security grades 4, 5
and 6. See Table 2.
Tested in accordance with 6.8.7.3.
Table 2 — Summary key related security
Grades
Clause Requirement Test clause Parameter Unit
1 2 3 4 5 6
Min. number
4.8.1 of effective 6.8.1 - 100 300 15 000 30 000 30 000 100 000 No
differs
Min. number
4.8.2 of moveable 6.8.2 - 2 3 5 5 6 6 No
detainers
Max. number
of identical - 100 70 60 60 60 50 %
c
steps
4.8.3 6.8.3
Max number
of identical - - 2 2 2 2 2 No
adjacent steps
Direct coding
4.8.4 6.8.4 - - - No No No No -
on key
Operation of
security
a a a b b b
4.8.5 6.8.5 Torque 1,5 1,5 1,5 1,5 1,5 1,5 Nm
mechanism
(Interpassing)
Torque
4.8.6 resistance of 6.8.6 Torque 2,5 5 15 15 15 15 Nm
plug/cylinder
Resistance
4.8.7 against 6.8.7.1  - - - 20 20 30 Points
manipulation
oSIST prEN 1303:2024
prEN 1303:2024 (E)
Grades
Clause Requirement Test clause Parameter Unit
1 2 3 4 5 6
Deducible
coding – Not 6.8.7.2 - - - - Yes Yes Yes -
possible
Manipulation
e e e
3 3 3
of detainers
6.8.7.3 - - - - No
by f f f
1 1 1
compression
a
Tested before the durability test.
b
Tested before and after the durability test.
c
Rounded to the lower integer.
d
Only in combination with security furniture that protects the plug against pulling.
e
When it is made plausible that manipulation is impossible this requirement is fulfilled.
f
One step remaining in the plug with 1 kg load on each spring and/or detainer if applicable.
g
1 mm in the plug, springs compressed until windings are in contact if applicable.
4.9 Attack resistance
4.9.1 General
The cylinders, including any reinforcement or protection device supplied with them shall be tested as one
unit.
In case of a double cylinder, it is assumed that the grades for the attack resistance apply to the attack
side/outside of the cylinder. This side shall have a proper indication, either on the product or on the
documents with the product. If both sides are identical, it is not necessary to put an indication on the
product.
To maintain the integrity of this standard, cylinders are recommended not to protrude from the surface
of the door or security furniture more than 3 mm. See also Annex C.
4.9.2 Resistance to attack by drilling
It shall not be possible to rotate the cam using a maximum torque of 5 Nm without the correct key, after
the drilling time specified in Table 3.
It is not necessary for the correct key to operate the cylinder after testing.
Testing in accordance with 6.9.1.
4.9.3 Resistance to attack by chisel
It shall not be possible to rotate the cam using a maximum torque of 5 Nm without the correct key, after
the number of blows specified in Table 3.
It is not necessary for the correct key to operate the cylinder after testing.
Testing in accordance with 6.9.2.
4.9.4 Resistance to attack by twisting
It shall not be possible to rotate the cam using a maximum torque of 5 Nm without the correct key, after
the number of twists specified in Table 3.
It is not necessary for the correct key to operate the cylinder after testing.
Testing in accordance with 6.9.3.
oSIST prEN 1303:2024
prEN 1303:2024 (E)
4.9.5 Resistance to attack by plug/cylinder extraction
It shall not be possible to extract the plug or cylinder to rotate the cam or operate the lock with the
requirements specified in Table 3.
It is not necessary for the correct key to operate the cylinder after testing.
Testing in accordance with 6.9.4.
4.9.6 Torque resistance of plug/cylinder relevant to attack resistance
It shall not be possible to rotate the plug and/or cylinder with a torque applied to the plug specified in
Table 3.
Tested in accordance with 6.9.5.
Table 3 — Summary attack resistance
Grades Unit
Test
Clause Requirement Parameter
clause
0 A B C D
Time
Resistance to
4.9.2 6.9.1 - 3/5 5/10 3/5 5/10 Min.
drilling
Net/Total
Resistance to
4.9.3 attack by 6.9.2 Blows - 30 40 30 40 No
chisel
Resistance to
4.9.4 attack by 6.9.3 Twists - 20 30 20 30 No
twisting
Resistance to
Force 10 15 kN
attack by
4.9.5 6.9.4 - - -
plug/cylinder
Net/Total 5/15 5/15 min
extraction
Torque
a
4.9.6 resistance of 6.9.5 Torque - 20 30 20 30 Nm
plug/cylinder
a
See requirement of key related security 4.8.6.
5 Test – General and test apparatus
5.1 General
To minimize the number of samples to be tested some samples may be used for several tests.
Locking cylinders of the same kind with length variations and different operating functions are
considered to be the same product. For each individual test procedure, the manufacturer and test
laboratory decide in reference to the normative requirements which cylinder variant shall be used for
testing.
In the event of a test failure, it shall not, at that point, be considered a failure to meet the standard. Two
further cylinders, with the same design, shall be tested according to the failed test and both shall pass the
test.
oSIST prEN 1303:2024
prEN 1303:2024 (E)
In case of a double cylinder, it is assumed that the grades for key related security apply to the attack
side/outside of the cylinder. This side shall have a proper indication, either on the product or on the
documents with the product. If both sides are identical, it is not necessary to put an indication on the
product.
Where a product range is submitted for evaluation the test authority shall consider each individual test
for each cylinder type. Where (by engineering judgement) it can be shown that a weaker or equivalent
cylinder type is to be evaluated then no further testing needs to be carried out.
Check the cylinders and keys conform to 4.8.1 to 4.8.6 before commencing the performance tests.
An example of a test sequence is shown in Annex B.
If additional instructions for testing are required, the manufacturer shall supply such additional
instructions. These additional instructions shall be documented in the test report.
5.2 Test rigs and apparatus
The test rigs described in this document are examples of principal unless specific design or measures are
shown in this standard.
The test apparatus shall be rigid enough to avoid influencing test measurements.
Instruments with an accuracy of ± 1,5 % of measured values, or better, shall be used for measurements
in accordance with these test methods.
All durability testing equipment shall include means of recording the number of cycles attained.
6 Test methods procedures
6.1 General
Cylinders and their original keys shall be taken at random and submitted for testing according to Annex B.
Throughout this document, the following tolerances shall apply, unless otherwise specified:
— mass in kilograms or grams (kg or g): ± 5 %,
— length in millimetres (mm): ± 2 %,
— force in kilo Newton or Newton (kN or N): ± 2 %,
— torque in Newton metres (Nm): ± 5 %,
— time in seconds or minutes (s or min): ± 5 %,
— temperature in degrees Celsius (°C): ± 2 °C.
Additional test methods for cylinders suitable for use in locking systems are defined in Annex F.
6.2 Key strength
The requirements of 4.2 shall be satisfied.
The cylinder shall be mounted, with the cam blocked against rotation, in the metal fixture illustrated in
Figure 4. The correct key shall be fully inserted in the cylinder and a torque of 2,5 Nm ± 0,1 Nm applied
+1
to it without shock for a period of 5 s.
The cam shall then be unblocked.
oSIST prEN 1303:2024
prEN 1303:2024 (E)
The key shall than be removed, reinserted and shall operate the cylinder with a torque not exceeding
1,5 Nm without torque on the cam.

Key
1 fixture
2 cylinder
3 key
Figure 4 — Metal fixture for testing key strength, operation of security mechanism and torque
resistance of plug and or cylinder
6.3 Durability tests — Standard test cycles
The cylinder shall conform to the requirements of 4.3.
The durability test shall be carried out on the cylinder using a test apparatus; see Figure 5. The apparatus
shall incorporate means for carrying out the following standard test cycle:
a) insert the key;
b) rotate it clockwise to 360° or to the maximum rotation limit of the design; during the rotation, the
+0,15
key shall overcome a torque applied to the cam of 0,15 Nm at least once to ensure that the cam
−0,05
will drive the deadbolt;
c) withdraw the key;
d) insert the key;
e) rotate it anticlockwise to 360° or to the maximum rotation limit of the design. During the rotation,
+0,15
the key shall overcome a torque applied to the cam of 0,15 Nm at least once to ensure that the
−0,05
cam will drive the deadbolt;
f) withdraw the key.
oSIST prEN 1303:2024
prEN 1303:2024 (E)
The plug shall be free from torque during insertion and withdrawal of the key. The resistive torque shall
not be applied before and after an angle of 15° from the position of the key extraction.
Repeat the sequence at a speed of five to 12 cycles per minute.
During the cycle test, the key may remain partly inserted in the cylinder but shall have cleared all movable
detainers.
The keys used for the durability test can be cleaned and the cylinder shall be lubricated according to
instructions of the manufacturer at the start of the test and after each 5 000 cycles or with a lower
frequency agreed between the manufacturer and the test lab, using a lubricant recommended by the
manufacturer.
In cases where it is not possible to use the standard cycle sequence, the manufacturer shall, if so desired,
specify an alternative sequence that conforms as closely as possible to the standard procedure. Subject
to the approval of the testing authority the modified sequence shall then be used. The test report shall
include a description of the special cycle used and the approval of the test authority.
If the cylinder should jam and cease to operate during the test, then providing the cylinder continues to
operate in the proper manner when released, the test shall be allowed to continue.
After completion of the appropriate number of cycles the operation of the cylinders shall be tested using
a new original key. The rotation shall be obtained with a maximum torque of 1,5 Nm without any load on
the cam.
Where a cylinder is uniquely suitable for use with a particular lock unit, or where a cylinder is sold with
and intended for use with a particular lock unit, then the cylinder shall be tested with the lock without
applying the 0,15 Nm resistive torque in the test.
Insert the key to its correct position for operating the cylinder plug. Forces caused by misalignment
should not result in the cylinder being damaged during the test.

Key
1 fixture
2 cylinder
3 key
4 flexible key guide
Figure 5 — Fixture for durability
oSIST prEN 1303:2024
prEN 1303:2024 (E)
6.4 Mechanical coding
Check in accordance with manufacturer’s information.
6.5 Suitable for use on fire resistance / smoke control doors
Test methods reference is made to Annex A.
6.6 Safety
No tests.
6.7 Corrosion resistance and test of operation at extreme temperatures
6.7.1 Corrosion resistance
The cylinder shall be tested with a neutral salt spray in accordance with EN 1670 grade 3.
For this test the cylinder shall be mounted in a block in accordance with the manufacturer's instructions
and placed in the cabinet that the cylinder is oriented in the manner that it would assume in use.
After the salt spray procedure, it shall be possible to operate the cylinder with the proper key using a
maximum torque of 1,5 Nm within 5 min where the key may be inserted several times and/or moved in
a rotating way.
This operational test shall be started within one min after completion of the salt spray test.
The cylinder may be lubricated before and/or during the operational test in accordance with the
manufacturer’s instructions.
6.7.2 Test of operation at extreme temperatures
The cylinder and key shall be stabilized at room temperature (20 ± 5) °C for at least 24 h before the test.
The key shall be kept separately at the temperature mentioned above during the following tests.
Stabilize the cylinder in +20 °C and 50 % RH for 1 h before lowering the temperature. The cylinder shall
be cooled gradually by decreasing the temperature at a rate of (20 ± 1) °C per hour until a temperature
of (-25 ± 2) °C is attained. The test temperature shall be maintained for a minimum of 10 min and a
maximum of 20 min, after which period the cylinder shall be operated with its correct key in the
laboratory at ambient temperature at least once within 5 attempts within 5 min.
Stabilize the cylinder in +20°C and 50 % RH for 1 h before rising the temperature. The cylinder shall be
heated gradually at a rate of (20 ± 1) °C per hour until a temperature of (65 ± 2) °C is attained. The test
temperature shall be maintained for a minimum of 10 min and a maximum of 20 min after which period
the cylinder shall be operated with its correct key in the laboratory at ambient temperature at least once
within 5 attempts within 5 min.
6.8 Key related security
6.8.1 Minimum numbers of effective differs
Check in accordance with manufacturer’s information.
6.8.2 Minimum number of movable detainer
Check in accordance with manufacturer’s information.
6.8.3 Maximum number of identical steps
Check in accordance with manufacturer’s information.
oSIST prEN 1303:2024
prEN 1303:2024 (E)
6.8.4 Direct coding on key
Check in accordance with manufacturer’s information.
6.8.5 Operation of the security mechanism
The cylinders shall be fitted in a metal fixture as illustrated in Figure 4.
After verification of the function using the correct key, attempts shall be made to operate the cylinder in
both directions by the next closest keys, according to the required security grade.
+0,2
A torque of 1,5 Nm shall be applied with a gentle increase of the torque and without shock to the bow
of a fully and correctly inserted next closest key (one step up and one step down) taken from the
manufacturer’s chart which shall differ from the correct key by one-step at one position only.
During the test, the fixing in the test apparatus shall keep the next closest key fully inserted and
maintained in that position. Clearances and tolerances between the key and cylinder shall be used in
attempt to operate the cylinder with the torque above.
For security grades 1, 2 and 3, the tests shall be performed on new cylinders.
For security grades 4, 5 and 6, the tests shall be performed on cylinders that have first been subjected to
the appropriate cycles for durability specified in 4.3.
The choice of the code and the position shall be agreed between the lab and the manufacturer.
6.8.6 Torque resistance of plug and/or cylinder
All requirements of 4.8.6 shall be fulfilled.
The cylinders shall be mounted in the metal fixture illustrated in Figure 4. A torque specified in Table 2
shall be applied to the plug by an appropriate tool. If the torque required cannot be applied, the cylinder
shall be deemed to have passed the test.
6.8.7 Manipulation resistance
6.8.7.1 Resistance against manipulation
Points calculat
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