DIN 623-1-1993 Rolling bearings fundamental principles designation marking《滚动轴承 基本原理、名称、标识》.pdf
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1、UDC 621.822.6/.8: 001.4: 003.62 DEUTSCHE NORM May 199 DIN - 623 Designation system for rolling bearings I Part 1 Wlzlager; Grundlagen; Bezeichnung, Kennzeichnung Supersedes March 1984 edition. Contents Page 1 Scope and field of application . 1 2 Designation structure 1 2.1 Nomenclature . 1 2.2 DIN n
2、umber 1 2.3 System of symbol groups . 2 2.4 Sequence of sections and supplementary symbols . 2 2.5 Structuring of designation 2 3 Symbols . 2 3.1 Prefixes 2 3.1.2 Material 2 3.2 Basic symbols 2 3.2.1 Bearing series . 2 3.2.2 Bore . 3 3.1.1 Sub-units . 2 1 Scope and field of application This standard
3、 specifies a designation system for rolling bearings which facilitates their identification ensuring the appropriate exchange of bearing parts (sub-units). 2 Designation structure The designation system is based on the specifications of DIN 820 Part 27, table 1 providing all the details required for
4、 the complete designation of bearings. Basic symbols shall always be given in full. Prefixes, suf- fixes and supplementary symbols (as specified in sub- clauses 3.1, 3.3 and 3.4) may be omitted: a) in cases where materials as specified in subclause 3.1.2 are used (standard cases); b) where the beari
5、ng does not have the particular fea- ture; c) in the cases dealt with in subclause 3.3 (PN, CN, SN), where no suffix is given for the cage; d) where no specifications have been made for the par- ticular feature. In this case, the bearing design shall be at the manufacturers discretion, with due cons
6、idera- tion being given to the relevant standards. Page 3.3 Suffixes 3 3.3.1 Internal design 3 3.3.2 External shape 3 3.3.3 Cage details 4 3.3.3.1 Cage material 4 3.3.3.2 Cage design . 4 3.3.3.3 Bearings without cage 4 3.3.4 Tolerances 4 3.3.5 Internal clearance 5 3.3.6 Heat treatment condition 5 3.
7、3.7 Lubrication . 5 4 Examples of designation 5 5 Survey 7 3.4 Supplementary symbols 5 6 Marking 14 Prefixes and suffixes may be invariably long, as long as their meaning is not changed. EXAMPLES: TN9: Plastic cage, design variant 9; JP3: Sheet steel window type cage, design variant 3. 2.1 Nomenclat
8、ure When combining symbols to form a designation in accord- ance with standards, the established nomenclature of roll- ing bearing types indicating the type of rolling bearing and its raceway geometry shall be used (e.g. deep groove ball bearing, self-aligning roller bearing). Given the restrictions
9、 on the number of characters in the designation block, the term radial widely used in commer- cial designations should be omitted. See table 3 for established nomenclature of rolling bear- ings. 2.2 DIN number See table 3 for the relevant DIN standards. Continued on pages 2 to 15. Beuth Verlag Gmbii
10、, Berlin, has lhe exclusive right of sale for German Standards (DIN-Normen). 05.95 DIN 623 Part 1 Engl. Price group 12 Sales No. O1 12 Page 2 DIN 623 Part 1 Table 1: Designation structure, number of symbols and reference to the relevant clause Term 2.1 (18 char- acters max.) Deep groove ball bearing
11、 self- aligning roller bearing E.g.- I) The designation may include up to 56 symbols. Identification DIN number System of symbol groups (18 characters max.) 3.4 Supple- mentary symbols 3.3 Suffixes 3.1 Prefixes 3.1.1 Sub-units 3.1.2 Material 3.2 Basic symbols 2.2 (10 char- acters max.) 3.2.2 Bore 3.
12、3.1 Internal design 3.3.2 External shape 3.3.3 Cage details 3.3.4 Tolerances 3.3.5 Internal clear- ance 3.3.6 Heat treatment condition 3.3.7 Lubrication 3.2.1 Bearing series Dimension series to DIN 616 DIN 625 At manu- facturers discretion. Bearing type Width or height series Diameter series DIN 636
13、 Sub-units designated by letters L and R represent a com- plete bearing of a particular type. However, full serviceabil- ity of the bearing is only ensured if these units originate from the same manufacturer. Where a separable ring consists of several elements, such as an inner ring and an extended
14、ring (e.9. for an NUP type cylindrical roller bearing), letter L shall be used. 2.3 System of symbol groups As shown in table 1, there are four groups of symbols (sec- tions), namely prefixes, basic symbols, suffixes, and sup- plementary symbols. 2.4 Sequence of sections and supplementary The (four)
15、 sections listed in subclause 2.3 shall be used in the order shown in that subclause. The sequence of symbols in the basic designation shall be as specified in subclause 3.2. For prefixes, suffixes and supplementary symbols, the order of numerals or letters shall be as specified in subclauses 3.1, 3
16、.3, and 3.4. symbols 3.1.2 Material As a rule, rings (e.g. outer and inner rings) and rolling ele- ments shall be made of steel as specified in DIN 17230; rolling bearings made of stainless steel shall be designated by prefix S. 3.2 Basic symbols The basic symbol designates the bearing type and size
17、. It, normally, is to consist of one symbol or one symbol group each for bearing series (cf. subclause 3.2.1) and bore (cf. subclause 3.2.2). See table 1 for the structure of basic sym- bols. The above specifications do not apply to needle cy- lindrical roller thrust bearings, needle roller thrust b
18、earings, open end drawn cups, closed end drawn cups, radial nee- dle roller and cage assemblies, thrust needle roller and cage assemblies and thrust washers. In these cases, the basic symbol is composed of symbol/group(s) of symbols for bearing type and characteristic dimension(s), as shown in table
19、 5. The designation system for metric tapered roller bearings specified in IS0355 applies by analogy and should be given preference for new designs. 2.5 Structuring of designation A blank, a dash (-), slash (4, cross (x) or full stop (0) may be used to separate designation blocks from one another. 3
20、 Symbols 3.1 Prefixes 3.1.1 Sub-units Prefixes shall be used to designate bearing parts (sub- units), e.g.: Sub-units of separable rolling bearings (e.g. cylindrical roller bearings or tapered roller bearings), such as separa- ble rings or roller sets with non-separable rings, shall be designated by
21、 a prefix: L separable ring (e.9. LNU 419, designating the inner ring of a bearing of series NU 419); R ring (inner or outer ring) with rolling element set K cage with rolling elements (e.g. RNU 419, designating the roller set, with the outer ring belonging to bearing series NU 419). 3.2.1 Bearing s
22、eries A bearing series is characterized by the bearing type and dimension series, each bearing series being identified by a group of numerals or letters or by a combination of numer- als and letters (cf. table 3). DIN 623 Part 1 Page 3 3.2.2 Bore cage details (cf. subclause 3.3.3); The symbol used t
23、o denote the bearing bore is to consist of tolerances (cf. subclause 3.3.4): numerals and is either appended to the symbol denoting the bearing series or, in some cases, preceded by a slash (see table 4). internal clearance (cf. subclause 3.3.5); heat treatment condition (cf. subclause 3.3.6); lubri
24、cation (cf. subclause 3.3.7). 3.3 Suffixes 3.3.1 Internal design Letters A, B, G, D, and E may be used to identify features Suffixes are used to designate the following A:_ of the bearing internal design. Their meaning is not speci- fied. Thev should be consistent with the Drefixes and suf- IlCs: in
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