Standard No.:	CSBTS TC 98.28-1997
English Name:	Rolling Bearing Parts - Indication Method for Form and Position Tolerance
Chinese Name:	滚动轴承零件形位公差标注方法
Professional Classification:	CS
Status:	valid
Target Language:	English
File Format:	PDF
Word Count:	2000 words
Translation Price(USD):	50.0
Delivery:	via email in 1 business day

Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative. This document is modified based on the mechanical industry standard (for internal use) ZQ 62-86 Rolling Bearing Parts - Indication Method for Form and Position Tolerance. The main content of this document conforms to the former standard, and only the compiling format is modified. Annex A of this document is informative. This document is under the jurisdiction of the National Technical Committee on Rolling Bearing of Standardization Administration of China. Contents Foreword i 1 Scope 1 2 Normative References 1 3 Form and Position Tolerance Items and Symbols of Rolling Bearing (See Table 1) 1 4 Indication Method for Form and Position Tolerance of Rolling Bearing 3 5 Positions in Drawings by Indication Method for Form and Position Tolerance of Rolling Bearing Parts) 3 6 Graphical Examples for Indication of Form and Position Tolerance of Rolling Bearing Parts 12 Annex A (Informative) Graphical Examples for Indication of Form and Position Tolerance of Rolling Bearing Parts 13 Rolling Bearing Parts - Indication Method for Form and Position Tolerance 1 Scope This document specifies the indication method for form and position tolerance of rolling bearing parts (excluding cage). This document is applicable to indication for product drawings and documents of rolling bearings. 2 Normative References The following normative standards and documents contain provisions which, through reference in this document, constitute provisions of this document. At time of publication, the editions indicated were valid. All the standards and documents will be revised; all parties coming to an agreement according to this document are encouraged to investigate the possibility of applying the most recent editions of the standards and documents below. GB 1182-80 Geometrical Tolerancing - Generalities, Definitions, Synbiks, Indications on Drawings 3 Form and Position Tolerance Items and Symbols of Rolling Bearing (See Table 1) Table 1 Form and position tolerance symbols of rolling bearing and their meanings Schematic symbols Equivalent to form and position tolerance items in GB 1182 Li, Le: straightness of inner/outer ring raceway Lw: straightness of rolling surface of rolling element Straightness Api, Ape: planeness of bottom surface of shaft/housing washer Planeness △Cir: roundness error of ring raceway and rolling surface of rolling element △Sph: deviation from spherical form of steel ball Roundness Vdp, VDp: inner/outer diameter variation in single radial plane Vdip, VDep: diameter variation of inner/outer ring raceway in single radial plane Vdmp, VDmp: average inner/outer diameter variation △Cur: curvature radius deviation in single axial plane Line profile VDex: diameter variation of outer ring raceway in single axial plane Si, Se: parallelism of radial ball bearing raceway with respect to end face Si, Se: parallelism of inner/outer ring raceway of double-row angular contact ball bearing with respect to end face Si1, Se1: parallelism of inner/outer ring raceway of double-row angular contact ball bearing VBs, VCs: width variation of inner/outer ring Si, Se: thickness variation of thrust bearing shaft/housing washer raceway with respect to bottom surface VH3s, VB2s, VB4s: width variation of inner ring rib, loose rib and thrust collar of cylindrical roller bearing VC2s, VC4s: width variation of outer ring rib of cylindrical roller bearing Sif: width variation of large inner ring rib of tapered roller bearing Sef: axial distance variation of inner surface of outer ring flange of tapered roller bearing with respect to reference end face Sim: axial distance variation of middle inner ring rib of self-aligning roller bearing with respect to end surface Parallelism Sd: circular runout of reference end face of inner ring with respect to the bore SDw: circular runout of roller reference end face Circular runout of end face Ki, Ke: thickness variation of inner/outer ring raceway of radial bearing with respect to inside and outside diameter surfaces Kir, Ker: the radial circular runout of one inner/outer ring raceway to the other Kif, Kef: radial circular runout of shaft/housing washer rib of thrust taper roller bearing with respect to inner and outer diameters Radial circular runout Ni, Ne: inclined circular runout of shaft/housing washer raceway Nf: normal circular runout of inner surface of large rib of shaft washer of self-aligning thrust roller bearing Inclined circular runout Sdi, SE: inclination variation of inner/outer ring raceway bus of tapered roller bearing with respect to reference end face Sdi: inclination variation of inner ring raceway bus of self-aligning roller bearing with respect to reference end face Inclination SD: inclination variation of outer diameter surface bus with respect to reference end face Sd, SDe: inclination variation of inner/outer ring raceway bus of cylindrical roller bearing with respect to reference end face 4 Indication Method for Form and Position Tolerance of Rolling Bearing Form and position tolerance box is divided into two or three segments, which are filled with the following contents from left to right: Segment I——schematic symbol of form and position tolerance; Segment II——form and position tolerance symbol and value of corresponding rolling bearing; Segment III——measuring reference code of this item. Example 1: Example 2: 5 Positions in Drawings by Indication Method for Form and Position Tolerance of Rolling Bearing Parts ) 5.1 Indication of form tolerance of bearing parts 5.1.1 Indication of diameter variation and average diameter variation (See Figures 1~4) Figure 1 Figure 2 Figure 3 Figure 4 5.1.2 Indication of deviation from spherical form and roundness error (see Figures 5~8) Figure 5 Figure 6 Figure 7 Figure 8 5.1.3 Indication of straightness (see Figures 9~12)

Foreword i 1 Scope 2 Normative References 3 Form and Position Tolerance Items and Symbols of Rolling Bearing (See Table 1) 4 Indication Method for Form and Position Tolerance of Rolling Bearing 5 Positions in Drawings by Indication Method for Form and Position Tolerance of Rolling Bearing Parts) 6 Graphical Examples for Indication of Form and Position Tolerance of Rolling Bearing Parts Annex A (Informative) Graphical Examples for Indication of Form and Position Tolerance of Rolling Bearing Parts