GB/T 894-2017Retaining rings for shaft (English PDF)

Foreword

This Standard is one of "retaining rings" series of standards. This series include.

GB/T 893 Retaining rings for bores;

GB/T 894 Retaining rings for shaft;

GB/T 896 "E" rings;

GB/T 959.1 Specifications for retaining rings - Circlips.

This Standard is drafted in accordance with the rules given in GB/T 1.1-2009.

This Standard replaces GB/T 894.1-1986 "Circlips for shaft - Type A" and GB/T 894.2-1986 "Circlips for shaft - Type B". As compared with GB/T 894.1-1986 and GB/T 894.2-1986, the main technical changes are as follows.

-GB/T 894.1-1986 and GB/T 894.2-1986 are combined into one standard; and the standard's name is modified;

-ADD specifications for standard type (Type A). d1=210, 220, 230, 240, 250, 260, 270, 280, 290, and 300 mm (SEE Table 1);

- MODIFY the thickness (s), and other dimensions and tolerances of standard type (Type A) (SEE Table 1);

-SPECIFY that the bore for installation pincer (d5) is the minimum limit dimension (SEE Table 1, Table 2);

ADD the standard value of bearing capacity FN of groove (SEE Table 1, Table 2, Chapter 5);

ADD the standard value of bearing capacity FR of rings (SEE Table 1, Table 2, Chapter 5);

ADD the limit speed of rings (SEE Table 1, Table 2, Chapter 5);

ADD a heavy type (Type B), d1 = 15 mm ~ 100 mm (SEE Table 2);

ADD installation tool standards and specifications (SEE Table 1, Table 2); ADD groove design and installation (SEE Chapter 6, Chapter 7);

- DELETE the previous Appendix A.

1 Scope

This Standard specifies the retaining rings for shaft of standard type (Type A) with bore diameter d1 = 3 mm ~ 300 mm and of heavy type (Type B) with d1 = 15 mm ~ 100 mm; and gives the groove design data for installing the retaining rings.

This Standard applies to the retaining rings, which can withstand axial force, used for fixed parts or components (such as rolling bearings) on the shaft.

2 Normative references

The following documents are indispensable for the application of this document. For the dated references, only the versions with the dates indicated are applicable to this document. For the undated references, the latest version (including all the amendments) are applicable to this document.

GB/T 959.1 Specifications for retaining rings - Circlips

GB/T 1237 Designation system for fasteners

JB/T 3411.47 Pincer for assembly spring thrust collar on shaft - Dimensions

3 Symbols

The following symbols are applicable to this document.

a - Lug radial width

b - Radial width opposite the opening of retaining ring

d1 - Shaft diameter

d2 - Groove diameter

d3 - Inner diameter of retaining ring in free state

d4 -The maximum centerline diameter of the external space. The calculation equation is. d4 = d1 - 2.1a

d5 - Installation bore diameter

FN - The groove bearing capacity when the lower yield strength of the material ReL = 200 MPa (SEE 5.2)

FR - Bearing capacity of the retaining ring at right angle contact (SEE 5.3)

FRg - Bearing capacity of the retaining ring at chamfer contact (SEE 5.3)

g - Part chamfer dimension (SEE Figure 2)

m - Groove width (SEE Table 1, Table 2)

n - Edge distance (SEE Table 1, Table 2)

nabl - Limit speed of retaining rings (SEE Table 1)

ReL - Lower yield strength of material

s - Thickness of retaining rings (SEE Table 1, Table 2)

t - The groove depth when d1 and d2 are nominal dimensions (SEE Figure 2)

4 Dimensions and design data

The dimensions of retaining ring and groove shall be in accordance with the provisions of Table 1 and Table 2. Among them, the dimensional tolerances apply to the dimensions before coating.

Figure 1 is only an example.

The load values for groove and groove edge are determined by specifications. The groove bottom shall be in accordance with 6.3.

5 Bearing capacity

6 Groove design