1、Plain bearings Part 3: Sintered bushes ICs 21.1 00.10 Descriptors: Plain bearings, bushes, sintered metal. DIN 1850-3 Supersedes June 1990 edition. Gleitlager -Teil 3: Buchsen aus Sintermetall In keeping with current practice in standards published by the International Organization for Standardizati
2、on (ISO), a comma has been used throughout as the decimal marker. Foreword This standard has been prepared by the Normenausschu Gleitlager (Plain Bearings Standards Committee). Except for thin series flanged bearings, most of the bearing dimensions and tolerances conform to IS0 2795 : 1991. Amendmen
3、ts In comparison with the June 1990 edition, the standard has been editorially revised and brought into line with IS0 2795. Previous editions DIN 146: 1921-01, 1932-08; DIN 147: 1921-01, 1932-08; DIN 16902: 1944-10; DIN 1850: 1957-04; DIN 1850-1 1959-05; DIN 1850-3: 1969-03, 1970-08, 1976-04, 1990-0
4、6. Dimensions in mm 1 Scope This standard specifies dimensions, tolerances, materials and the finish for sintered (metal) bushes used as plain bearings. 2 Normative references This standard incorporates, by dated or undated reference, provisions from other publications. These normative references ar
5、e cited at the appropriate places in the text and the titles of the publications are listed below. For dated references, subsequent amendents to or revisions of any of these publications apply to this standard only when incorporated in it by amendment or revision. For undated references, the latest
6、edition of the publication referred to applies. DIN 4768 Determination of surface roughness parameters Ra, R, and R, using electric stylus instru- ments - Concepts and measuring conditions DIN 4771 Measurement of profile peak height, P, of surfaces Continued on pages 2 to 6. Translation by DIN-Sprac
7、hendienst. In case of doubt, the German-language original should be consulted as the authoritative text. O No part of this translation may be reproduced without the prior permission of Ref. No. DIN 1850-3 : 1998-07 DIN Deutsches lnstitut fr Normung e. V., Berlin. Beutb Verlag GmbH, D-i0772 Berlin, h
8、as the exclusive right of sale for German Standards (DIN-Normen). English price group 06 Sales NO. O1 06 01.99 Page 2 DIN 1850-3 : 1998-07 DIN 3091 0-1 Material specifications for sintered metals - General information DIN 3091 0-3 Material specifications for sintered metals for bearings and componen
9、ts for sliding contact DIN 30912-5 Guidelines for sintered metal materials - Assembly of sintered components DIN 51519 IS0 viscosity classification for industrial liquid lubricants IS0 2795 : 1991 Plain bearings - Sintered bushes - Dimensions and tolerances IS0 5755 : 1996 Sintered metal materials -
10、 Specifications 3 Dimensions and designation Specifications for the standard tolerance grade (IT) are based on d, or d,. Designation of a type J cylindrical bearing (J) with an inside diameter, di, of 18 mm, an outside diameter, d, of 24 mm and a width, b, of 18 mm, made from grade Sint-B5O sintered
11、 bronze, oil-impregnated: Bearing DIN 1850 - J 18 x 24 x 18 - Sint-B50 Designation of a type V flanged bearing (V) with an inside diameter, d, of 18 mm, an outside diameter, d, of 24 mm and a width, b, of 18 mm, made from grade Sint-B50 sintered bronze, oil-impregnated: Bearing DIN 1850 - V 18 x 24
12、x 18 - Sint-B50 Designation of a type K spherical bearing (K) with an inside diameter, d, of 18 mm, made from sintered bronze grade Sint-B50, unlubricated (X): Bearing DIN 1850 - K 18 - Sint-B50 - X 4 Material Bushes shall be made from sintered metal materials as specified in DIN 30910-3 or IS0 5755
13、. If they are to be oil-impregnated, the IS0 viscosity grade of the oil specified in DIN 51 51 9 or the identifying brand shall either be agreed upon or shall be at the manufacturers discretion. Where oil-impregnation is not desired, an X shall be included in the designation. 5 Tolerances and finish
14、 The finish shall conform to the specifications given in DIN 3091 0-1 (the porous structure of sintered metal does not permit the surface roughness to be specified in accordance with DIN 4768 or DIN 4771). The manufacturing and assembly tolerances shall be as specified in table 4. NOTE: Since the ac
15、tual tolerances depend upon the assembly method (press-fitted or bonded), they shall be For manufacturing reasons, a deviation from circularity is permitted in the case of type J bearings (thin series) or bearings subject to closer tolerances on diameter, its magnitude being subject to agreement bet
16、ween manufacturer and user. indicated in the designation. For details, see DIN 30912-5 or apply to the bearing manufacturer. Page 3 DIN 1850-3 : 1998-07 -0” e Figure 1: Type J bearing (cylindrical) Table i: Type J bearing (cylindrical) Page 4 DIN 1850-3 : 1998-07 50 55 60 Figure 2: Type V bearing (f
17、langed) 5 0,7 0,8 5 0,7 0,8 6 0,8 08 - - 60 70 35 50 65 75 40 55 72 84 50 60 - - - - Page 5 DIN 1850-3 1998-07 w / IT9 A *) A burr around the circumference is permitted provided that d, is not exceeded and the tolerance on radial Figure 3: Type K bearing (spherical) runout is complied with. Table 3:
18、 Type K bearing (spherical) Page 6 DIN 1850-3 : 1998-07 Table 4: Tolerances I Types J and V G7*) Type K H6*) 4 r6 d3 jsl3 I d4 hl 1 jsl3 I Bearing bore for types J and V H7 I Bearing bore for type K HI0 *) H7 after fitting where insertion pin produced to an m5 tolerance is used. The pin shall have a
19、 shoulder which is in full contact with the bush end. Note that the bearing clearance is a function of the difference between shaft diameter and bush inside diameter after fitting. *) Tolerance remains unchanged where bushes are not press-fitted. Note that the bearing clearance is a function of the
20、difference between shaft diameter and bush inside diameter after fitting. Other relevant standards DIN 1850-4 Plain bearings - Artificial carbon bushes DIN 1850-5 Plain bearings - Thermoset bushes DIN 1850-6 Plain bearings - Thermoplastic bushes IS0 4379 : 1993 Plain bearings - Copper alloy bushes IS0 121 28 : 1995 Plain bearings - Lubrication holes, grooves and pockets - Dimensions, types, designation and their application to bearing bushes
