1、BRITISH STANDARD Castors and wheels - Castors for furniture - Requirements The European Standard EN 125281998 has the status of a British Standard ICs 97.140 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN 12528:1999 STD=BSI BS EN 12528-ENGL 1999 1b2LibbS 075Lib02 AT2 M
2、BS EN 126281999 National foreword ”his British Standard is the English language version of EN 125281998. The UK participation in its preparation was entnisted to Technical Committee MHE/7, Industrial trucks - Safety, which has the responsibfity to: - aid enquirers to understand the text; - present t
3、o the responsible European committee any enquiries on the - monitor related international and European developments and promulgate interpretation, or proposals for change, and keep the UK interests informed; them in the UK A iist of organizations represented on this committee can be obtained on requ
4、est to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” fwilily of th
5、e BSI Standards Electronic Catalogue. A British Standard does not purport to include ail the necessary provisions of a contsact. Users of British Standards are responsible for their correct appluiizatiOns of the following countries are bound to implement this European standard: Auskia, Belgium, Czec
6、h Republic, Denmark, ENand, France, Germanx Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Foreword 1 Scope 2 Normative references 3 Denitions 4 Dimensions and classification 4.1 Fxing system 4.2 Castor type 4.3
7、 Dimensions 4.4 Performance level 5 Requirements 5.1 Standard conditions 5.2 Impact performance 5.3 Electrical resistance test 5.4 Manual locking device 5.5 Dynamic test 5.6 Rollingrnistance 5.7 Swivel resistance 5.8 Static load performance 5.9 Stem retention 6 Conformity 7 Marking of the product 7.
8、1 Productmarking 7.2 Marking of electrically conductive or antistatic castor(s)hvheel(s) Pee 2 3 3 3 3 3 3 3 4 4 4 4 5 5 5 6 6 6 7 7 7 7 7 O BSI O81999 STD-BSI BS EN 12528-ENGL 1999 II 1b24bb9 0754b05 501 1 Scope This European Standard specifies the technical requirements, the appropriate dimensions
9、 and the requirements for testing. This European Standard applies to castors for general furniture applications, but specifically excludes those for swivel chairs and other specialized applications. 2 Normative references This European Standard incorporates by dated or undated reference, provisions
10、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 only to this European Standard only when incorporated in it by
11、 amendment or revision. For undated references the latest edition of the publication referred to applies. EN 125261998, Castors and wheels - Vocabulary, recommended symbols and multilingual dictionary. EN 125271998, Castors and wheels - Test methods and apparatus. 3 Definitions For the purpose of th
12、is European Standard, definitions and recommended symbols of EN 125261998 apply. 4 Dimensions and classification The characteristics of a castor are: - ffig system; - castor type; - dimensions; - performance level. 4.1 Fixing system The fixing system includes top plates, stem and circlip, threaded s
13、tem 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 (3, W, C and S). These all apply to the castor designs illustrated in Figures 1,2 and 3. 4.2.1 Qpe H Castors with plain wheels are defined as
14、type H, hard tread. NOTE These castors are suitable for carpeted floors. 4.2.2 Qpe 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 mpe C Castors which are e
15、lectrically conductive. Type C castors may have a hard or soft tread. NOTE These castors shall have eit,her modified type H or type W wheels. 4.2.4 Qpe S Inclined axle castor. Page 3 EN 12528:1998 4.3 Dimensions The Figures 1,2 and 3 show typical castor designs; Table 1 shows the specified dimension
16、s. I Figure 1 - Single-wheel swivel castor D I - 1 Figure 2 - min wheel swivel castor I Figure 3 - Inclined axle castor The wheel(s) of a fixed castor shall conform to the dimensions shown in Figures 1,2 and 3 (as appropriate). O BSI 03-1999 STD.BSI BS EN 12528-ENGL 1999 lbZLIbb9 0754bOb 448 9 Descr
17、iption Castor designs Page 4 EN l2628:1998 Symbol Dimension Wheel diameter “win wheel castors All ID min. 20 I min. 2 x 5 I llead curvature Angle of inchation Single wheel castors ?-5 min. 110 Inclined axle castors max. 25 4.4 Performance level The requirements for castors will vary dependent on the
18、 environment in which they are intended to be used. The levels are shown in Pable 2. Level Load capacity L, N Il Reference 6.2 I100 Test sequence Castors designs Test procedure reference Impact performance All 4.12 12 I200 I 6.6 6.7 6.9 6.8 13 I300 I Rolling resistance All 4.15 Swivel resistance swi
19、vel castors 4.16 Stem retention All 4.9 static load All 4.17 14 I400 I Performance Free falling mass Ls kg level 1 25 6 Requirements Ibting requirements for castors and wheels are listed below. kst apparatus and procedures are defined in EN 125271998. Drop height h, 150 mm 5.1 Standard conditions 5.
20、1.1 Environmental conditions Tests shall be carried out at a temperature between 17 OC and 23 OC. During the 24 h prior to the test the mple(s) shall remain at the above temperature, in an environment with a relative humidity between 40 % and 70 %. Sample(s) shall not be artificially cooled during t
21、esting. 6.1.2 Test sequence A new castor shall be taken and the impact test performed A second new castor) shall be taken and the remaining tests performed in the sequence shown in ?able 3. 6.2 Impact performance 5.2.1 ! % +2 o% Page 5 EN 125281998 6.3.4 Acceptance criteria The resistance R of the s
22、ample tested shall be: - conductive castor(s) or wheel(s): R 5 lo4 R; - antistatic castor(s) or wheel(s): lo5 5 R I lo7 R. 6.4 Manual locking device 5.4.1 Test objectives, apparatus and procedures Detailed in 4.6 of EN 125271998. 6.4.2 Test values The test values are listed below. 5.4.3 Tolerances T
23、he tolerances are: 0 % +; % The tolerance of the time of application of load (10 s) is +2 o c. 6.4.4 Acceptance criteria The wheel does not revolve around its axis when a force Ki is applied. 5.6 Dynamic test 5.5.1 Test objectives, apparatus and procedures Detailed in 4.13 of EN 125271998. 6.6.2 Tes
24、t values The test values are listed below. I2mm I omm I height of obstacles I O BSI 03-1999 _ Page 6 EN 1252 % +15 min O IT1 h I O BSI 03-1999 STD.BSI BS EN 12528-ENGL 1999 I 1b24bb7 0754bD9 157 I Symbol Value for Value for Description circlip other stems stems Li0 15N 30 N pd+ut force Page 7 EN 125
25、281998 7.2 Marking of electrically conductive or antistatic castor(s)/wheel(s) AU products shall bear on their outer surface a clearly O BSI 03-1999 BS EN 128281999 BSI 389 ChiswickHigh Road London w4 4AL BSI - British Standards Institution BSI is the independent national body responsible for prepar
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