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This standard is one of the series standards on “retaining rings”, which consist of:
——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 developed in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 893.1-1986 Retaining rings for holes - Type A and GB/T 893.2-1986 Retaining rings for hole - Type B. The following technical changes have been made with respect to GB/T 893.1-1986 and GB/T 893.2-1986:
——GB/T 893.1-1986 and GB/T 893.2-1986 are combined into one standard with new title;
——Standard type (Type A) specifications: d1=210, 220, 230, 240, 250, 260, 270, 280, 290 and 300mm are added (see Table 1);
——Thickness (s) and other dimensions and tolerances of standard type (Type A) are modified (see Table 1);
——Minimum limit dimension of the hole (d5) for installation pliers are specified (see Table 1 and Table 2);
——Standard value of bearing capacity of groove FN is added (see Table 1, Table 2 and Clause 5);
——Standard value of bearing capacity of retaining ring FR is added (see Table 1, Table 2 and Clause 5);
——Installation tool standards and specifications are added (see Table 1 and Table 2);
——Heavy-duty type (Type B) is added, with d1 = 20mm ~ 100mm (see Table 2);
——Groove design and installation are added (see Clauses 6 and 7);
——Annex A in the former standard is deleted.
This standard was proposed by China Machinery Industry Federation.
This Standard is under the jurisdiction of National Technical Committee 85 on Fasteners of Standardization Administration of China (SAC/TC 85).
This standard is interpreted by the National Technical Committee 85 on Fasteners of Standardization Administration of China (SAC/TC 85).
The previous editions of this standard are as follows:
——GB/T 893-1976;
——GB/T 893.1-1986;
——GB/T 893.2-1986.
Retaining rings for bores
1 Scope
This standard specifies two types of retaining rings for bores: standard type (Type A) with aperture d1= 8mm ~ 300mm and the heavy-duty type (Type B) with aperture d1= 20mm ~ 100mm, and gives the design data of groove for assembling the retaining ring.
This standard is applicable to retaining rings capable of bearing axial force for fixing parts or components (such as rolling bearings) in bores.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 959.1 Specifications for retaining rings - Circlips
GB/T 1237 Designation system for fasteners
JB/T 3411.48 Pincer for assembly spring thrust collar in hole - Dimensions
3 Symbols
For the purposes of this document, the following symbols apply.
a radial width of a lug
b radial width opposite to the opening of retaining ring
d1 aperture
d2 groove diameter
d3 outer diameter of retaining ring in free state
d4 the minimum inner hole diameter on centerline, calculated using formula: d4 =d1-2.1a
d5 diameter of mounting hole
FN bearing capacity of groove with material lower yield strength of ReL=200MPa (see 5.2)
FR bearing capacity of retaining ring using right-angled contact (see 5.3)
FRg bearing capacity of retaining ring using chamfered contact (see 5.3)
g chamfer dimension of parts (see Figure 2)
m groove width (see Table 1 and Table 2)
n edge distance (see Table 1 and Table 2)
ReL material lower yield strength
s thickness of retaining ring (see Table 1 and Table 2)
t groove depth when d1 and d2 are nominal (see Figure 2)
4 Dimension and design data
Dimensions of retaining ring and groove shall be as specified in Table 1 and Table 2. Thereof, dimensional tolerance is applicable to the dimension before plating.
Figure 1 is for reference only.
Groove and its edge load values shall be accordance with specifications. Groove bottom shall be as specified in 6.3.
Note: The shape of retaining ring shall be determined by the manufacturer.
Figure 1 Dimensions
Figure 2 Example for installation
Foreword i
1 Scope
2 Normative references
3 Symbols
4 Dimension and design data
5 Bearing capacity
6 Groove design
7 Installation
8 Technical specifications
9 Marking
