1、DEUTSCHE NORM Mav 1999 Castors and wheels Castors for furniture Requirements Enalish version of DIN EN 12528 I DIN EN 12528 ICs 97.140 Rder und Rollen - Mbelrollen - Anforderungen European Standard EN 12528 : 1998 has the status of a DIN Standard. A comma is used as the decimal marker. National fore
2、word This standard has been prepared by CEN/TC 324. The responsible German body involved in its preparation was the Normenausschu Eisen-, Blech- und Mefallwaren (Hardware, Tinware and Metal Products Standards Committee), Technical Committee Rader und Rollen. EN comprises 12 pages. No pari of this st
3、andard may be reproduced without the prior permission of Ref. No. DIN EN 12528 : 1999-0 Y Deutsches Institut fr Normung e. V., Berlin. wth Verlag GmbH, D-10772 Berlin, has the exclusive right of sale for German Standards (DIN-Normen). English price group O7 Sales No. 1107 11.99 EUROPEAN STANDARD NOR
4、ME EUROPENNE EUROPISCHE NORM EN 12528 September 1998 ICs 97.140 English version Castors and wheels Requirements Castors for furniture Roues et roulettes - Roulettes pour meubles - Prescriptions Anforderungen Rder und Rollen - Mbelrollen - This European Standard was approved by CEN on 1998-08-30. CEN
5、 members are bound to comply with the CENKENELEC 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 stand- ards may be obtained on app
6、lication to the Central Secretariat or to any CEN member. The European Standards exist 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 Central Secretariat has
7、the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, the Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, the Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, and the United Kingdom. CEN
8、European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels O 1998. CEN - All rights of exploitation in any form and by any means reserved worldwide for CEN national members. Ref. No. EN 12528 : 1998 E
9、Page 2 EN 12528: 1998 Content 1 2 3 4 4.1 4.2 4.3 4.4 5 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 6 7 7.1 7.2 Foreword Scope Normative references Definitions Dimensions and classification Fixing system Castor type Dimensions Performance level Requirements Standard Conditions Impact performance Electrical
10、resistance test Manual locking device Dynamic test Rolling resistance Swivel resistance Static load performance Stem retention Conformity Marking of the product Product marking Marking of electrically conductive or antistatic castor(s) 1 wheel(s) Page 3 3 3 3 4 4 4. 4 6 6 6 7 8 8 9 10 10 11 11 12 12
11、 12 12 Page 3 EN 12528: 1998 Foreword This European Standard has been prepared by Technical Committee CEN/TC 324 “Castors and wheels”, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by en
12、dorsement, at the latest by March 1999, and conflicting national standards shall be withdrawn at the latest by March 1999 According to the CENKENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium,
13、 Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. 1 Scope This European Standard specifies the technical requirements, the appropriate dimensions and the requirements for
14、testing. This European Standard applies to castors for general furniture applications, but specifically excludes those for swivel chairs and other specialised applications. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. T
15、hese 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 only to this European Standard only when incorporated in it by amendment or revision. Fo
16、r undated references the latest edition of the publication referred to applies. EN 12526 : 1998 Castors and wheels - Vocabulary, recommended symbols and multilingual dictionary EN 12527 : 1998 Castors and wheels - Test methods and apparatus 3 Definitions For the purpose of this European Standard, de
17、finitions and recommended symbols of EN 12526: 1998 apply. Page 4 EN 12528: 1998 4 Dimensions and classification The characteristics of a castor are: - fixing system - castor type - dimensions - performance level 4.1 Fixing system The fixing system includes top plates, stem and circlip, threaded ste
18、m and other fixing systems. Fixings shall be chosen with reference to the application of the castor. 4.2 Castor type Castors are classified into four types (H, W, C and S). These all apply to the castor designs illustrated in figures 1, 2 and 3. 4.2.1 Type H: Castors with plain wheels are defined as
19、 Type H, hard tread. NOTE: These castors are suitable for carpeted floors. 4.2.2 Type W: Castors with resilient tyred wheels are defined as Type W, soft tread. NOTE: These castors are suitable for hard stone, wooden or tiled floors or those featuring non-textiled covering. 4.2.3 TypeC: Castors which
20、 are electrically conductive. Type C castors may have a hard or soft tread. NOTE: These castors shall have either modified type H or type W wheels. 4.2.4 Type S: Inclined axle castor 4.3 Dimensions The figures 1,2 and 3 show typical castor designs; table 1 shows the specified dimensions. Page 5 EN 1
21、2528: 1998 Figure 1: Single-wheel swivel castor Figure 2: Twin wheel swivel castor Figure 3: Inclined axle castor Page 6 EN 12528: 1998 Description Wheel diameter The wheel(s) of a fixed castor shall conform to the dimensions shown in figures 1, 2 and 3 (as appropriate). Castor designs Symbol Dimens
22、ion All D min. 20 Table 1: Specified dimensions External corner radius Tread curvature Ande of inclination All r3 min. 1,5 single wheel castors r5 min. 110 Inclined axle castors max. 25 Tread width Level 1 2 I min. 7,5 1 T3 1 min. 2 x 5 single wheel castors twin wheel castors Load capacityLl N 1 O0
23、200 3 4 4.4 Performance level 300 400 The requirements for castors will vary dependent on the environment in which they are intended to be used. The levels are shown in table 2. Table 2: Levels of performance 5 Requirements Testing requirements for castors and wheels are listed below. Test apparatus
24、 and procedures are defined in EN 12527 : 1998. 5.1 Standard Conditions 5.1.1 Environmental conditions Tests shall be carried out at a temperature between 170 C and 230 C. During the 24 h prior to the test the sample(s) shall remain at the above temperature, in an environment with a relative humidit
25、y between 40 % and 70 %. Sample( s) shall not be artificially cooled during testing. Page 7 EN 12528: 1998 Reference 5.2 5.3 5.1.2 Test sequence Test sequence Castors designs Test procedure reference Impact performance All 4.12 Electrical resistance Castors TvDe c 4.4 A new castor shall be taken and
26、 the impact test performed. 5.4 5.5 5.6 A second new castor(s) shall be taken and the remaining tests performed in the sequence shown in table 3. Manual locking device Castors with manual 4.6 locking devices Dynamic All 4.13 All 4.15 Table 3: Test sequence for castor designs and test procedure refer
27、ence Performance level Free falling mass Ls Drop height h2 kg mm .-. 1 2S 2 58 3 5 ,O 4 5 .O 150 150 200 300 Unit acceptable +2%/0 +3/0 L5 kg h2 mm - 5.2.3 Tolerances The tolerances are: I Symbol I Tolerance I 5.2.4 Acceptance criteria No part of a castor shall become detached during the tests with
28、the loads and drop heights specified in table 4. On completion of the test the rolling, pivoting or braking performance shall not be impaired. Page 8 EN 12528: 1998 Li LI7 R 5.3 Electrical resistance test variable load capacity 5 to 10 % of LI variable measured electrical resistance test load 5.3.1
29、Test objectives, apparatus and procedures LI Detailed in 4.4 of EN 12527 : 1998 N I +2%/0 5.3.2 Test values Symbol JI KI The test values are listed below. Value Description variable 20 % of LI load capacity as test load horizontal tractive force I Svmbol 1 Value I DescriDtion I Symbol LI KI Toleranc
30、e Unit acceptable N +2%/0 N +4%/0 5.3.3 Tolerances The tolerance is: I Svmbol I Tolerance 1 5.3.4 Acceptance criteria The resistance R of the sample tested shall be: - conductive castor(s) or wheelts): R ; lo4 !2 - antistatic castor(s) or wheel(s): 10 IRI107R 5.4 Manual locking device 5.4.1 Test obj
31、ectives, apparatus and procedures Detailed in 4.6 of EN 12527 : 1998 5.4.2 Test values The test values are listed below. 5.4.3 Tolerances The tolerances are: Page 9 EN 12528: 1998 Symbol 5.4.4 Acceptance criteria Tolerance Unit I acceptable The wheel does not revolve around its axis when a force KI
32、is applied. 5.5 Dynamic test 5.5.1 Test objectives, apparatus and procedures Detailed in 4.13 of EN 12527 : 1998 5.5.2 Test values The test values are listed below. 7 type H- castor 3 min 2 min 6,5 cycles er min 5.5.3 Tolerances The tolerances are: The tolerances are: +2%/0 O/-5% +1%/0 +/- 10s +I- 1
33、0s O/-3% - of the obstacle width (50 mm): +/-2% - - of the angle of 90 to the running direction: + / - 3 of the running distance of 1 m: + 25 mm/O 5.5.4 Acceptance criteria No castor or a part of a castor shall become detached during the tests. Each castor shall still be capable of carrying out its
34、function at the end of the test programme. On completion of the test the rolling, pivoting or braking performance shall not be impaired. Page 10 EN 12528: 1998 Symbol LI L8 v3 5.6 Rolling resistance 5.6.1 Test objectives, apparatus and procedures Detailed in 4.15 of EN 12527 : 1998 5.6.2 Test values
35、 The test values are listed below. Value Description variable 3 XL 50 mds travel speed load capacity as test load test load (including frame) L8 v3 5.6.3 Tolerances N +2%/0 mmis +I-5% The tolerances are: b Symbol Value Description Li variable load capacity as test load L-9 v3 50 mds travel speed LI
36、per castor applied load (dependent on the number of castors fitted in the test rig) I Svmbol I Tolerance Li Unit 1 acceptable Li I N I +2%/0 N I +2%/0 5.6.4 Acceptance criteria The horizontal force w3 shall not exceed 15 % of Lg, 5.7 Swivel resistance 5.7.1 Test objectives, apparatus and procedures
37、Detailed in 4.16 of EN 12527 : 1998 5.7.2 Test values The test values are listed below. The tolerances are: I Svmbol I Tolerance i Page 11 EN 12528: 1998 Symbol Li vi 5.7.4 Acceptance criteria The horizontal force w4 shall not exceed 20 % of Lg. Value Description variable 2 load factor load capacity
38、 as test load 5.8 Static load performance 5.8.1 Test objectives, apparatus and procedures Detailed in 4.9 of EN 12527 : 1998 5.8.2 Test values The test values are listed below: Symbol Value for circlip stems Li0 15 N Value for other stems Description 30 N minimum pull-out force Y2 124h I time of app
39、lication load Y3 124h I elapsed time prior to inspection 5.8.3 Tolerances The tolerances are: Symbol Tolerance Unit +2%/0 + 15 min10 v7 +/- 1 h 5.8.4 Acceptance criteria Wheel deformation measured after a time y3 shall not exceed 3 % of the wheel diameter. On completion of the test the rolling, pivo
40、ting or braking performance shall not be impaired. Page 12 EN 12528: 1998 6 Conformity The manufacturer declares on request by a certificate of conformity that the castors are in accordance with the requirements as stated in this document. The type of testing machine shall be stated in the conformit
41、y document. 7 Marking of the product 7.1 Product marking All the products shall be permanently marked with a name and/or trade mark of the manufacturer. 7.2 Marking of electrically conductive or antistatic castor) / wheel) All products shall bear on their outer surface a clearly visible yellow mark, and where appropriate and possible should include the word “antistatic“.
