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GB/T 305-2019 English PDF

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GB/T 305-2019: Rolling bearings - Snap ring grooves and snap rings for radial bearings - Dimensions, geometrical product specifications (GPS) and tolerance values
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GB/T 305: Evolution and historical versions

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
GB/T 305-2019	English	359	Add to Cart	4 days [Need to translate]	Rolling bearings - Snap ring grooves and snap rings for radial bearings - Dimensions, geometrical product specifications (GPS) and tolerance values	Valid	GB/T 305-2019
GB/T 305-1998	English	479	Add to Cart	3 days [Need to translate]	Rolling bearings. Snap ring groove and snap ring on outer ring. Dimensions and tolerances	Obsolete	GB/T 305-1998
GB 305-1989	English	359	Add to Cart	3 days [Need to translate]	Rolling bearings with locating snap ring--Dimensions and tolerances	Obsolete	GB 305-1989

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Basic data

Standard ID	GB/T 305-2019 (GB/T305-2019)
Description (Translated English)	Rolling bearings - Snap ring grooves and snap rings for radial bearings - Dimensions, geometrical product specifications (GPS) and tolerance values
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	J11
Classification of International Standard	21.100.20
Word Count Estimation	18,184
Date of Issue	2019-10-18
Date of Implementation	2020-05-01
Issuing agency(ies)	State Administration for Market Regulation, China National Standardization Administration

GB/T 305-2019: Rolling bearings - Snap ring grooves and snap rings for radial bearings - Dimensions, geometrical product specifications (GPS) and tolerance values

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Chapter 3); --- Modified the design of the stop groove and stop ring (see Figure 1 ~ Figure 3, Figure 1 of the.1998 edition); --- Reorganized the "symbols" (see Table 1, Chapter 3 of the.1998 edition); --- Move the stop groove size, chamfer size and tolerance value of radial bearing with nominal outside diameter D < 30mm from the text to the appendix A, Tables 1, 3 and 5 of the.1998 edition); --- Move the stop ring size and tolerance value of radial bearings with a nominal outer diameter D < 30mm from the text to the appendix (see Appendix B,.1998 Version of Table 2, Table 4 and Table 5); --- Added stop ring material (see Appendix C); --- Added application examples (see Appendix D); --- Added an example of the specification drawing of the stop groove specification (see Appendix E). This standard uses the redrafting method to modify the ISO 464..2015 "rolling bearings radial bearings with positioning stop ring size, production Geometrical Technical Specifications (GPS) and Tolerances. Compared with ISO 464..2015, this standard adds a chapter in structure (Chapter 7). The technical differences between this standard and ISO 464..2015 are as follows. --- Added Chapter 7, giving examples of stop ring marking, in order to standardize the stop ring marking method. The following editorial changes have been made to this standard. --- Change the standard name to "Dimensions of Rolling Bearing Radial Bearing Stop Grooves and Stop Rings, Product Geometric Technical Specifications (GPS) and Difference ". This standard is proposed by China Machinery Industry Federation. This standard is under the jurisdiction of the National Rolling Bearing Standardization Technical Committee (SAC/TC98). This standard was drafted. Luoyang Bearing Research Institute Co., Ltd., Cixing Group Co., Ltd., Zhejiang Wuzhou Xinchun Group Co., Ltd., Chongqing Changjiang Bearing Co., Ltd., Zhejiang Xinchang New Shaft Industry Co., Ltd., Shandong Ji'ena Mechanical Engineering Technology Co., Ltd., Fujian Province Yongan Bearing Co., Ltd. The main drafters of this standard. Du Xiaoyu, Zhao Kun, Liang Guilin, Zhao Xingxin, Pang Qixing, Yan Jingxiang, Liu Ningqi, Yang Liu. The previous versions of the standards replaced by this standard are. --- GB 305-1964, GB 305-1982, GB 305-1989, GB/T 305-1998.

Introduction

This standard is the geometrical elements of mechanical parts specified in the product geometric technical specification (GPS) system (see ISO 14638 [7] matrix model) standard. Unless otherwise specified, the basic principles of ISO /GPS given in ISO 8015 [3] are applicable to this standard, and given in ISO 14253-1 [5] The default principles apply to technical specifications based on this standard. The relationship between functional requirements and measurement methods and measurement uncertainty is recommended to be considered. Traditional measurement methods are in ISO 1132-2 [2] An explanation is given in this paper, and measurement uncertainty is recommended to focus on ISO 14253-2 [6]. For smaller radial bearings, when D < 30mm, machining the groove may cause deformation of the raceway. Therefore, it is recommended to use Ring bearings instead, these smaller bearing stop grooves and stop ring information see Appendix A and Appendix B. Appendix C and Appendix D give examples of stop ring materials and correct application of the stop ring, respectively. Appendix E gives an example of an actual stop groove designation. Rolling bearing radial bearing stop groove and stop ring Dimensions, product geometry specifications (GPS) and tolerance values

1 Scope

This standard specifies compliance with size series 18, size series 19 and diameter series 0, diameter series 2, and diameter series 3 in ISO 15 [1]. And diameter series 4 (except size series 00, size series 82, size series 83). The chamfer size on the side of the stop groove, and the size and tolerance of the stop ring. This standard is applicable to stop grooves and stop rings for axial positioning of radial bearings for design, inspection and acceptance by users.

2 Normative references

The following documents are essential for the application of this document. For dated references, only the dated version applies to this article Pieces. For undated references, the latest version (including all amendments) applies to this document. ISO 582 Rolling bearing chamfer size maximum (Rolingbearings-Chamferdimensions-Maximumval- ues) ISO 1101 Geometrical Product Specifications (GPS) Geometric Tolerances Shape, Orientation, Position, and Runout Tolerance productspecifications (GPS) -Geometricaltolerancing-Tolerancesofform, orientation, locationand run-out] ISO 5593 rolling bearing vocabulary (Rolingbearings-Vocabulary) ISO 14405-1 Geometrical Product Specifications (GPS) Dimensional Tolerances Part 1. Linear Dimensions [Geometricalproduct specifications (GPS) -Dimensionaltolerancing-Part 1. Linearsizes] ISO 15241 rolling bearing parameter symbols (Rolingbearings-Symbolsforphysicalquantities)

3 terms and definitions

The terms and definitions defined in ISO 1101, ISO 5593 and ISO 14405-1 apply to this document.

4 symbols

The symbols are shown in Figures 1 to 3 and Table 1. In order to indicate that the product geometric technical specification (GPS) system is applied, the product technical file (as shown in the figure) should include dimensions and geometric characteristics. versus Dimensions and geometric specifications related to these characteristics are described in Table 1. The tolerance value related to the characteristic is expressed by t plus the characteristic symbol, such as. tΔas. The default ISO size specification operation set in this standard is consistent with ISO 14405-1, that is, the two-point size is valid. In Tables 2 to 5, Tables A.1, A.2, B.1 and B.2, the symbols U and L are specified as follows. U --- upper limit deviation; L --- lower limit deviation. Appendix E gives an example of actual pattern annotation. Figure 1 Stop ring Figure 2 Stop ring after installation Note. "UZ" see ISO 1101..2012, 10.2. Figure 3 Stop groove and chamfer Table 1 Nominal size symbols, characteristic symbols and specification modifiers Nominal size symbol (Size and distance) Characteristic symbol a GPS symbols and specifications Modifiers b, c Description d a Nominal positioning distance of stop groove Δas Position of the end face of the stop groove with a distance "a" relative to the second reference B The second benchmark B is bound by the first benchmark A b Nominal width of stop groove Δbs Deviation of two-point size of stop groove width from nominal size D bearing nominal outside diameter D1 Nominal diameter of stop groove bottom ΔD1s Deviation of the two-point size of the bottom diameter of the stop groove from the nominal size D2 Nominal outer diameter of stop ring after installation D3 Nominal inner diameter of stop ring before installation ΔD3s The deviation of the two-point size of the inner diameter of the stop ring before installation e Stop ring profile nominal height Δe In any longitudinal section containing the axis of the outer surface of the stop ring Deviation of minimum external dimension of stop ring section height from nominal dimension f Nominal thickness of stop ring Δf Deviation of two-point size of stop ring thickness from nominal size g Nominal opening width of stop ring after installation r0 Nominal fillet radius of stop groove bottom r0smax Maximum single fillet radius at the bottom of the stop groove r1 Nominal chamfer size of outer ring on one side of stop groove r1smin Minimum single chamfer size of outer ring on one side of stop groove Note. See Figure 3 for the complete GPS labeling. a Except for the format, follow the symbols defined in ISO 15241. b According to the symbols defined in ISO 1101 and ISO 14405-1. c The specification modifier "" should not be marked on the drawing because the two-point size is the default size specification modifier. d The description is based on ISO 1101 and ISO 14405-1. 5 Stop groove size, chamfer size and tolerance values Dimension series 18, size series 19 radial bearing's stop groove dimensions, chamfer dimensions and tolerance values are as specified in Table 2; diameter series 0, Radial bearings in diameter series 2, diameter series 3 and diameter series 4 are in accordance with the provisions of Table 3. The chamfer size "r1" is applicable to the chamfer shown in Fig. 3, and is specified as "r1smin" in Tables 2 and 3. Table 2 Stop groove dimensions, chamfer dimensions and tolerance values for radial series 18 and 19 series radial bearings in millimeters D D1 tΔD1s UL Size series a tΔas a tΔas tΔbs UL r0smax Size series r1smina 30 28.7 0 -0.3--1.3 0.15 0.95 0.25 0 0.25-0.3 32 30.7 0 -0.3 1.3 0.15--0.95 0.25 0 0.25 0.3- 34 32.7 0 -0.3 1.3 0.15--0.95 0.25 0 0.25 0.3- 37 35.7 0 -0.3 1.3 0.15 1.7 0.15 0.95 0.25 0 0.25 0.3 0.3 39 37.7 0 -0.3--1.7 0.15 0.95 0.25 0 0.25-0.3 40 38.7 0 -0.3 1.3 0.15--0.95 0.25 0 0.25 0.3- 42 40.7 0 -0.3 1.3 0.15 1.7 0.15 0.95 0.25 0 0.25 0.3 0.3 44 42.7 0 -0.3 1.3 0.15--0.95 0.25 0 0.25 0.3- 45 43.7 0 -0.3--1.7 0.15 0.95 0.25 0 0.25-0.3 47 45.7 0 -0.3 1.3 0.15 1.7 0.15 0.95 0.25 0 0.25 0.3 0.3 52 50.7 0 -0.3 1.3 0.15 1.7 0.15 0.95 0.25 0 0.25 0.3 0.5 55 53.7 0 -0.3--1.7 0.15 0.95 0.25 0 0.25-0.5 58 56.7 0 -0.3 1.3 0.15--0.95 0.25 0 0.25 0.3- 62 60.7 0 -0.4--1.7 0.15 0.95 0.25 0 0.25-0.5 65 63.7 0 -0.4 1.3 0.15--0.95 0.25 0 0.25 0.3- 68 66.7 0 -0.4--1.7 0.15 0.95 0.25 0 0.25-0.5 72 70.7 0 -0.4 1.7 0.15 1.7 0.15 0.95 0.25 0 0.25 0.3 0.5 78 76.2 0 -0.4 1.7 0.15--1.3 0.3 0 0.4 0.3- 80 77.9 0 -0.4--2.1 0.2 1.3 0.3 0 0.4-0.5 85 82.9 0 -0.4 1.7 0.15 2.1 0.2 1.3 0.3 0 0.4 0.5 0.5 90 87.9 0 -0.4 1.7 0.15 2.1 0.2 1.3 0.3 0 0.4 0.5 0.5 95 92.9 0 -0.4 1.7 0.15--1.3 0.3 0 0.4 0.5- 100 97.9 0 -0.4 1.7 0.15 2.5 0.2 1.3 0.3 0 0.4 0.5 0.5 105 102.6 0 -0.5--2.5 0.2 1.3 0.3 0 0.4-0.5 110 107.6 0 -0.5 2.1 0.2 2.5 0.2 1.3 0.3 0 0.4 0.5 0.5 115 112.6 0 -0.5 2.1 0.2--1.3 0.3 0 0.4 0.5- 120 117.6 0 -0.5 2.1 0.2 3.3 0.2 1.3 0.3 0 0.4 0.5 0.5 125 122.6 0 -0.5 2.1 0.2 3.3 0.2 1.3 0.3 0 0.4 0.5 0.5 130 127.6 0 -0.5 2.1 0.2 3.3 0.2 1.3 0.3 0 0.4 0.5 0.5 140 137.6 0 -0.5 2.5 0.2 3.3 0.2 1.9 0.3 0 0.6 0.5 0.5 145 142.6 0 -0.5--3.3 0.2 1.9 0.3 0 0.6-0.5 Table 2 (continued) Units are mm D D1 tΔD1s UL Size series a tΔas a tΔas tΔbs UL r0smax Size series r1smina 150 147.6 0 -0.5 2.5 0.2 3.3 0.2 1.9 0.3 0 0.6 0.5 0.5 165 161.8 0 -0.5 3.3 0.2 3.7 0.2 1.9 0.3 0 0.6 0.5 0.5 175 171.8 0 -0.5 3.3 0.2--1.9 0.3 0 0.6 0.5- 180 176.8 0 -0.5--3.7 0.2 1.9 0.3 0 0.6-0.5 190 186.8 0 -0.5 3.3 0.2 3.7 0.2 1.9 0.3 0 0.6 0.5 0.5 200 196.8 0 -0.5 3.3 0.2--1.9 0.3 0 0.6 0.5- a The corresponding maximum chamfer size is in accordance with ISO 582. Table 3 Stop groove dimensions, chamfer dimensions, and tolerance values for radial series 0, diameter series 2, diameter series 3, and diameter series 4 radial bearings In millimeters D D1 tΔD1s UL Diameter series 0 2, 3 and 4 a tΔas a tΔas tΔbs UL r0smax Diameter series r1smina 30 28.17 0 -0.26--2.06 0.16 1.35 0.3 0 0.4-0.5 0.5 0.5 32 30.15 0 -0.25 2.06 0.16 2.06 0.16 1.35 0.3 0 0.4 0.3 0.5-0.5 35 33.17 0 -0.25 2.06 0.16 2.06 0.16 1.35 0.3 0 0.4 0.3 0.5 0.5- 37 34.77 0 -0.25--2.06 0.16 1.35 0.3 0 0.4--0.5 0.5 40 38.1 0 -0.25--2.06 0.16 1.35 0.3 0 0.4-0.5-- 42 39.75 0 -0.25 2.06 0.16 2.06 0.16 1.35 0.3 0 0.4 0.5-0.5 0.5 44 41.75 0 -0.25 2.06 0.16--1.35 0.3 0 0.4 0.5--- 47 44.6 0 -0.25 2.06 0.16 2.46 0.15 1.35 0.3 0 0.4 0.5 0.5 0.5- 50 47.6 0 -0.25--2.46 0.15 1.35 0.3 0 0.4-0.5-- 52 49.73 0 -0.25 2.06 0.16 2.46 0.15 1.35 0.3 0 0.4 0.5 0.5 0.5 0.5 55 52.6 0 -0.25 2.08 0.2--1.35 0.3 0 0.4 0.5--- 56 53.6 0 -0.25--2.46 0.15 1.35 0.3 0 0.4--0.5- 58 55.6 0 -0.25 2.08 0.2 2.46 0.15 1.35 0.3 0 0.4 0.5 0.5-- 62 59.61 0 -0.5 2.08 0.2 3.28 0.21 1.9 0.3 0 0.6 0.5 0.5 0.5 0.5 65 62.6 0 -0.5--3.28 0.21 1.9 0.3 0 0.6-0.5-- 68 64.82 0 -0.51 2.49 0.2 3.28 0.21 1.9 0.3 0 0.6 0.5-0.5- 72 68.81 0 -0.51--3.28 0.21 1.9 0.3 0 0.6-0.5 0.5 0.5 Table 3 (continued) Units are mm D D1 tΔD1s UL Diameter series 0 2, 3 and 4 a tΔas a tΔas tΔbs UL r0smax Diameter series r1smina 75 71.83 0 -0.51 2.49 0.2 3.28 0.21 1.9 0.3 0 0.6 0.5-0.5- 80 76.81 0 -0.51 2.49 0.2 3.28 0.21 1.9 0.3 0 0.6 0.5 0.5 0.5 0.5 85 81.81 0 -0.5--3.28 0.21 1.9 0.3 0 0.6-0.5-- 90 86.79 0 -0.51 2.87 0.2 3.28 0.21 2.7 0.3 0 0.6 0.5 0.5 0.5 0.5 95 91.82 0 -0.51 2.87 0.2--2.7 0.3 0 0.6 0.5--- 100 96.8 0 -0.51 2.87 0.2 3.28 0.21 2.7 0.3 0 0.6 0.5 0.5 0.5 0.5 110 106.81 0 -0.51 2.87 0.2 3.28 0.21 2.7 0.3 0 0.6 0.5 0.5 0.5 0.5 115 111.81 0 -0.51 2.87 0.2--2.7 0.3 0 0.6 0.5--- 120 115.21 0 -0.5--4.06 0.2 3.1 0.3 0 0.6-0.5 0.5 0.5 125 120.22 0 -0.51 2.87 0.2 4.06 0.2 3.1 0.3 0 0.6 0.5 0.5-- 130 125.22 0 -0.51 2.87 0.2 4.06 0.2 3.1 0.3 0 0.6 0.5 0.5 0.5 0.5 140 135.23 0 -0.51 3.71 0.26 4.9 0.25 3.1 0.3 0 0.6 0.5 0.5 0.5 0.5 145 140.23 0 -0.5 3.71 0.26--3.1 0.3 0 0.6 0.5--- 150 145.24 0 -0.51 3.71 0.26 4.9 0.25 3.1 0.3 0 0.6 0.5 0.5 0.5 0.5 0.5 160 155.22 0 -0.51 3.71 0.26 4.9 0.25 3.1 0.3 0 0.6 0.5 0.5 0.5 0.5 170 163.65 0 -0.51 3.71 0.26 5.69 0.25 3.5 0.3 0 0.6 0.5 0.5 0.5- 180 173.66 0 -0.51 3.71 0.26 5.69 0.25 3.5 0.3 0 0.6 0.5 0.5 0.5 0.5 190 183.64 0 -0.51--5.69 0.25 3.5 0.3 0 0.6-0.5 0.5 0.5 200 193.65 0 -0.51 5.69 0.25 5.69 0.25 3.5 0.3 0 0.6 0.5 0.5 0.5 0.5 210 203.6 0 -0.5 5.69 0.25 5.69 0.25 3.5 0.3 0 1 0.5--0.5 215 208.6 0 -0.5--5.69 0.25 3.5 0.3 0 1-0.5 0.5- 225 217 0 -0.5 6.5 0.3 6.5 0.3 4.5 0.4 0 1 0.5-0.5 0.5 230 222 0 -0.5--6.5 0.3 4.5 0.4 0 1-0.5-- 240 232 0 -0.5 6.5 0.3 6.5 0.3 4.5 0.4 0 1 0.5-0.5 0.5 250 242 0 -0.5--6.5 0.3 4.5 0.4 0 1-0.5-0.5 a The corresponding maximum chamfer size is in accordance with ISO 582.

6 Stop ring dimensions and tolerance values

The size and tolerance values of the stop ring of size series 18 and size series 19 radial bearings are as specified in Table 4; diameter series 0, diameter series 2, Radial bearings of diameter series 3 and diameter series 4 are specified in Table 5. Table 4 Stop ring dimensions and tolerance values for radial series 18 and 19 series radial units are in millimeters D2a max D3 tΔD3s UL tΔe UL tΔf UL ga 30 32.8 28.3 0 -0.3 2.05 0 -0.15 0.85 0 -0.1 3 32 34.8 30.3 0 -0.3 2.05 0 -0.15 0.85 0 -0.1 3 34 36.8 32.3 0 -0.3 2.05 0 -0.15 0.85 0 -0.1 3 37 39.8 35.3 0 -0.3 2.05 0 -0.15 0.85 0 -0.1 3 39 41.8 37.3 0 -0.3 2.05 0 -0.15 0.85 0 -0.1 3 40 42.8 38.3 0 -0.3 2.05 0 -0.15 0.85 0 -0.1 3 42 44.8 40.3 0 -0.4 2.05 0 -0.15 0.85 0 -0.1 3 44 46.8 42.3 0 -0.4 2.05 0 -0.15 0.85 0 -0.1 4 45 47.8 43.3 0 -0.4 2.05 0 -0.15 0.85 0 -0.1 4 47 49.8 45.3 0 -0.4 2.05 0 -0.15 0.85 0 -0.1 4 52 54.8 50.3 0 -0.4 2.05 0 -0.15 0.85 0 -0.1 4 55 57.8 53.3 0 -0.4 2.05 0 -0.15 0.85 0 -0.1 4 58 60.8 56.3 0 -0.6 2.05 0 -0.15 0.85 0 -0.1 4 62 64.8 60.2 0 -0.6 2.05 0 -0.15 0.85 0 -0.1 4 65 67.8 63.2 0 -0.6 2.05 0 -0.15 0.85 0 -0.1 4 68 70.8 66.2 0 -0.6 2.05 0 -0.15 0.85 0 -0.1 5 72 74.8 70.2 0 -0.6 2.05 0 -0.15 0.85 0 -0.1 5 78 82.7 75.7 0 -0.6 3.25 0 -0.15 1.12 0 -0.1 5 80 84.4 77.4 0 -0.6 3.25 0 -0.15 1.12 0 -0.1 5 85 89.4 82.4 0 -0.6 3.25 0 -0.15 1.12 0 -0.1 5 90 94.4 87.4 0 -0.6 3.25 0 -0.15 1.12 0 -0.1 5 95 99.4 92.4 0 -0.6 3.25 0 -0.15 1.12 0 -0.1 5 100 104.4 97.4 0 -0.6 3.25 0 -0.15 1.12 0 -0.1 5 105 110.7 101.9 0 -0.8 4.04 0 -0.15 1.12 0 -0.1 5 110 115.7 106.9 0 -0.8 4.04 0 -0.15 1.12 0 -0.1 5 115 120.7 111.9 0 -0.8 4.04 0 -0.15 1.12 0 -0.1 5 120 125.7 116.9 0 -0.8 4.04 0 -0.15 1.12 0 -0.1 7 125 130.7 121.8 0 -0.8 4.04 0 -0.15 1.12 0 -0.1 7 130 135.7 126.8 0 -0.8 4.04 0 -0.15 1.12 0 -0.1 7 140 145.7 136.8 0 -1 4.04 0 -0.15 1.7 0 -0.1 7 145 150.7 141.8 0 -1 4.04 0 -0.15 1.7 0 -0.1 7 150 155.7 146.8 0 -1.2 4.04 0 -0.15 1.7 0 -0.1 7 165 171.5 161 0 -1.2 4.85 0 -0.15 1.7 0 -0.1 7 Table 4 (continued) Units are mm D2a max D3 tΔD3s UL tΔe UL tΔf UL ga 175 181.5 171 0 -1.2 4.85 0 -0.15 1.7 0 -0.1 10 180 186.5 176 0 -1.2 4.85 0 -0.15 1.7 0 -0.1 10 190 196.5 186 0 -1.4 4.85 0 -0.15 1.7 0 -0.1 10 200 206.5 196 0 -1.4 4.85 0 -0.15 1.7 0 -0.1 10 a The dimensions of the stop rings D2 and g listed in the table after they are installed in the stop grooves. The stop ring should not have a radial clearance in the stop groove. The inch rose slightly. Table 5 Stop ring dimensions and tolerance values for diameter series 0, diameter series 2, diameter series 3 and diameter series 4 radial bearings In millimeters D2a max D3 tΔD3s UL tΔe UL tΔf UL ga 30 34.7 27.9 0 -0.4 3.25 0 -0.15 1.12 0 -0.1 3 32 36.7 29.9 0 -0.4 3.25 0 -0.15 1.12 0 -0.1 3 35 39.7 32.9 0 -0.4 3.25 0 -0.15 1.12 0 -0.1 3 37 41.3 34.5 0 -0.4 3.25 0 -0.15 1.12 0 -0.1 3 40 44.6 37.8 0 -0.4 3.25 0 -0.15 1.12 0 -0.1 3 42 46.3 39.5 0 -0.5 3.25 0 -0.15 1.12 0 -0.1 3 44 48.3 41.5 0 -0.5 3.25 0 -0.15 1.12 0 -0.1 3 47 52.7 44.3 0 -0.5 4.04 0 -0.15 1.12 0 -0.1 4 50 55.7 47.3 0 -0.5 4.04 0 -0.15 1.12 0 -0.1 4 52 57.9 49.4 0 -0.5 4.04 0 -0.15 1.12 0 -0.1 4 55 60.7 52.3 0 -0.5 4.04 0 -0.15 1.12 0 -0.1 4 56 61.7 53.2 0 -0.6 4.04 0 -0.15 1.12 0 -0.1 4 58 63.7 55.2 0 -0.6 4.04 0 -0.15 1.12 0 -0.1 4 62 67.7 59 0 -0.6 4.04 0 -0.15 1.7 0 -0.1 4 65 70.7 62 0 -0.6 4.04 0 -0.15 1.7 0 -0.1 4 68 74.6 64.2 0 -0.6 4.85 0 -0.15 1.7 0 -0.1 5 72 78.6 68.2 0 -0.6 4.85 0 -0.15 1.7 0 -0.1 5 75 81.6 71.2 0 -0.6 4.85 0 -0.15 1.7 0 -0.1 5 80 86.6 76.2 0 -0.6 4.85 0 -0.15 1.7 0 -0.1 5 85 91.6 81.2 0 -0.6 4.85 0 -0.15 1.7 0 -0.1 5 90 96.5 86.2 0 -0.6 4.85 0 -0.15 2.46 0 -0.1 5 95 101.6 91.2 0 -0.6 4.85 0 -0.15 2.46 0 -0.1 5 Table 5 (continued) Units are mm D2a max D3 tΔD3s UL tΔe UL tΔf UL ga 100 106.5 96.2 0 -0.8 4.85 0 -0.15 2.46 0 -0.1 5 110 116.6 106.2 0 -0.8 4.85 0 -0.15 2.46 0 -0.1 5 115 121.6 111.2 0 -0.8 4.85 0 -0.15 2.46 0 -0.1 5 120 129.7 114.6 0 -0.8 7.21 0 -0.15 2.82 0 -0.1 7 125 134.7 119.6 0 -0.8 7.21 0 -0.15 2.82 0 -0.1 7 130 139.7 124.6 0 -0.8 7.21 0 -0.15 2.82 0 -0.1 7 140 149.7 134.6 0 -1.2 7.21 0 -0.15 2.82 0 -0.1 7 145 154.7 139.6 0 -1.2 7.21 0 -0.15 2.82 0 -0.1 7 150 159.7 144.5 0 -1.2 7.21 0 -0.15 2.82 0 -0.1 7 160 169.7 154.5 0 -1.2 7.21 0 -0.15 2.82 0 -0.1 7 170 182.9 162.9 0 -1.2 9.6 0 -0.15 3.1 0 -0.1 10 180 192.9 172.8 0 -1.2 9.6 0 -0.15 3.1 0 -0.1 10 190 202.9 182.8 0 -1.4 9.6 0 -0.15 3.1 0 -0.1 10 200 212.9 192.8 0 -1.4 9.6 0 -0.15 3.1 0 -0.1 10 210 222.8 202.7 0 -1.4 9.6 0 -0.15 3.1 0 -0.1 10 215 227.8 207.7 0 -1.4 9.6 0 -0.15 3.1 0 -0.1 10 225 237 216.1 0 -1.4 10 0 -0.15 3.5 0 -0.1 10 230 242 221 0 -1.4 10 0 -0.15 3.5 0 -0.1 10 240 252 231 0 -1.4 10 0 -0.15 3.5 0 -0.1 10 250 262 241 0 -1.4 10 0 -0.15 3.5 0 -0.1 10 a The dimensions of the stop rings D2 and g listed in the table after they are installed in the stop grooves. The stop ring should not have a radial clearance in the stop groove. The inch rose slightly.

7 Marking example

Example. Stop ring 67.7 GB / T 305-2019 The outer diameter D = 62mm, diameter series 0, diameter series 2, diameter series 3, and diameter series 4 radial bearings are equipped with a stop ring with an outer diameter of 67.7mm.

Appendix A

(Informative appendix) D < 30mm radial groove bearing stop groove size, chamfer size and tolerance value For smaller radial bearings, when D < 30mm, machining the groove may cause deformation of the raceway. Therefore, it is recommended to use a flange Instead of ring bearings, the dimensions are in accordance with ISO 8443 [4]. D < 30mm, the size of the stop groove, chamfer size and tolerance of the 19 series radial bearings are given in Table A.1; D < 30mm, straight Information on radial series 0, diameter series 2 and diameter series 3 radial bearings is given in Table A.2. Table A.1 Stop groove size, chamfer size and tolerance value of 19 radial bearings of D < 30mm size series are in millimeters D D1 tΔD1s UL a tΔas b tΔbs UL r0smax r1smina 22 20.8 0 -0.3 1.05 0.15 0.8 0.25 0 0.2 0.2 24 22.8 0 -0.3 1.05 0.15 0.8 0.25 0 0.2 0.2 28 26.7 0 -0.3 1.3 0.15 0.95 0.25 0 0.25 0.3 a The corresponding maximum chamfer size is in accordance with ISO 582. Table A.2 D < 30mm diameter series 0, diameter series 2 and diameter series 3 radial bearing stop groove size, chamfer size and tolerance values In millimeters D D1 tΔD1s UL Diameter series 0 2 and 3 a tΔas a tΔas tΔbs UL r0smax Diameter series r1smina 13 12.04 0 -0.13--1.1 0.15 0.80 0.25 0 0.2-0.2 0.2 16 15.16 0 -0.12--1.2 0.15 0.80 0.25 0 0.2-0.2 0.2 19 18.25 0 -0.15 1.73 0.18 1.73 0.18 0.80 0.25 0 0.2 0.3 0.3 0.3 22 21.11 0 -0.16 1.73 0.18 1.73 0.18 0.80 0.25 0 0.2 0.3 0.3 0.3 24 23.00 0 -0.15 1.73 0.18 1.73 0.18 0.80 0.25 0 0.2 0.3 0.3 0.3 26 25.15 0 -0.15 1.73 0.18 1.73 0.18 0.80 0.25 0 0.2 0.3 0.3 0.3 28 26.7 0 -0.3 1.73 0.18 1.73 0.18 0.95 0.25 0 0.25 0.3-0.3 a The corresponding maximum chamfer size is in accordance with ISO 582.

Appendix B

(Informative appendix) Dimensions and tolerances of stop rings for D < 30mm radial bearings The dimensions and tolerance values of the stop ring of D < 30mm, size series 19 radial bearings are given in Table B.1; D < 30mm, diameter series 0, Information on diameter series 2 and diameter series 3 radial bearings is given in Table B.2. Table B.1 Stop ring size and tolerance value for 19 radial bearings of D < 30mm size series unit is mm D2a max D3 tΔD3s UL tΔe UL tΔf UL ga 22 24.8 20.5 0 -0.3 2 0 -0.15 0.7 0 -0.1 2 24 26.8 22.5 0 -0.3 2 0 -0.15 0.7 0 -0.1 2 28 30.8 26.4 0 -0.3 2.05 0 -0.15 0.85 0 -0.1 3 a The dimensions of the stop rings D2 and g listed in the table after they are installed in the stop grooves. The stop ring should not have a radial clearance in the stop groove. The inch rose slightly. Table B.2 Stop ring dimensions and tolerance values for radial bearings of diameter < 0, diameter series 2 and diameter series 3 for D < 30mm In millimeters D2a max D3 tΔD3s UL tΔe UL tΔf UL ga 13 14.3 11.9 0 -0.3 1.15 0 -0.15 0.7 0 -0.1 3 16 18.5 15 0 -0.3 1.65 0 -0.15 0.7 0 -0.1 3 19 21.5 18 0 -0.3 1.65 0 -0.15 0.7 0 -0.1 3 22 25.1 20.8 0 -0.4 2 0 -0.15 0.7 0 -0.1 3 24 27 22.7 0 -0.4 2 0 -0.15 0.7 0 -0.1 3 26 29.2 24.9 0 -0.4 2 0 -0.15 0.7 0 -0.1 3 28 30.8 26.4 0 -0.4 2.05 0 -0.15 0.85 0 -0.1 3 a The dimensions of the stop rings D2 and g listed in the table after they are installed in the stop grooves. The stop ring should not have a radial clearance in the stop groove. The inch rose slightly.

Appendix C

(Informative appendix) Stop ring material The stop ring is recommended to be made of spring steel with a hardness of 450HV ~ 520HV.

Appendix D

(Informative appendix) Application example See Figure D.1 for examples of applications with stop ring bearings. When assembling the radial bearing housing, the stop ring is in axial contact with the bearing housing and the bearing. In addition, the outer diameter of the stop ring and the bearing bore should also maintain a certain gap in the radial direction. Figure D.1 Example of application with stop ring bearing

Appendix E

(Informative appendix) Example of dimension specification for stop groove specifications Figure E.1 shows an example of the standard drawing of the stop groove specifications specified in this standard. Note. Dimensions (not to scale) and tolerance values correspond to radial bearings of size series 10, inner diameter 60mm and outer diameter 95mm. Figure E.1 Example of a pattern references [1] ISO 15 Rolingbearings-Radialbearings-Boundarydimensions, generalplan [2] ISO 1132-2 Rolingbearings-Tolerances-Part 2. Measuringandgaugingprinciples andmethods [3] ISO 8015 Geometrical productspecifications (GPS) -Fundamentals-Concepts, principals andrules [4] ISO 8443 Rolingbearings-Radialbalbearingswithflangedouterring-Flangedimen- sions [5] ISO 14253-1 Geometrical productspecifications (GPS) -Inspectionbymeasurementof workpieces and measuring equipment-Part 1. Decision rules for verifying conformity or nonconformitywithspecifications [6] ISO 14253-2 Geometrical product specifications (GPS) -Inspectionbymeasurementof workpiecesandmeasuringequipment-Part 2. GuidancefortheestimationofuncertaintyinGPS measurement, incalibrationofmeasuringequipmentandinproductverification [7] ISO 14638 Geometrical productspecifications (GPS) -Matrixmodel

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