GB/T 276 6300 Series Deep Groove Ball Bearings Specification
What GB/T 276 fixes, what it deliberately leaves to another document, its equivalents, and the dimensional table.
GB/T 276 is the Chinese national standard for the boundary dimensions of single row deep groove ball bearings, identical in the dimensions it fixes to ISO 15 for this bearing type. A 6204 supplied to GB/T 276 mounts in the same seat as one supplied to ISO 15 or DIN 625-1.
Standard
GB/T 276
Covers
Deep groove ball bearings, boundary dimensions
Does not fix
It fixes dimensions. Load ratings follow GB/T 6391 (equivalent to ISO 281), tolerances GB/T 307.1 (ISO 492) and internal clearance GB/T 4604.1 (ISO 5753-1).
Equivalents
ISO 15 and DIN 625-1 cover the same bearings with the same dimensions.
Product
6300 Series Deep Groove Ball Bearings
Governing standards
ISO 15 / DIN 625-1 / GB/T 276
Equivalence between the ISO, DIN and GB/T documents is dimensional: a bearing made to either mounts in the same seat. It is not an equivalence of load rating, tolerance class or internal clearance, each of which is fixed by a separate standard and declared separately.
6300 Series Deep Groove Ball Bearings manufactured to GB/T 276 are tabulated below. The standard covers deep groove ball bearings, boundary dimensions — and reading it as though it covered anything else is the most common mistake made with a bearing standard, so the boundary of its scope is set out first.
GB/T 276 — Scope
GB/T 276 is the Chinese national standard for the boundary dimensions of single row deep groove ball bearings, identical in the dimensions it fixes to ISO 15 for this bearing type. A 6204 supplied to GB/T 276 mounts in the same seat as one supplied to ISO 15 or DIN 625-1.
What GB/T 276 Does Not Fix
It fixes dimensions. Load ratings follow GB/T 6391 (equivalent to ISO 281), tolerances GB/T 307.1 (ISO 492) and internal clearance GB/T 4604.1 (ISO 5753-1).
This division of labour is the thing to carry away from any bearing standard. A boundary dimension standard makes bearings interchangeable; it does not make them equivalent. Two bearings of the same designation from different makers mount in the same seat and are not required to have the same load rating, the same internal design, the same cage or the same speed limit.
Dimensions Supplied to GB/T 276
Designation
Bore d (mm)
Outer diameter D (mm)
Width B (mm)
Chamfer r min (mm)
Basic dynamic load rating Cr (kN)
Basic static load rating C0r (kN)
Limiting speed grease (rpm)
Mass (kg)
6300
10
35
11
0.6
8.06
3.40
17000
0.053
6301
12
37
12
1
9.75
4.15
16000
0.060
6302
15
42
13
1
11.4
5.40
14000
0.082
6303
17
47
14
1
14.3
6.55
12000
0.115
6304
20
52
15
1.1
16.8
7.80
10000
0.144
6305
25
62
17
1.1
23.4
11.6
8500
0.232
6306
30
72
19
1.1
29.6
16.0
7000
0.350
6307
35
80
21
1.5
35.1
19.0
6300
0.460
6308
40
90
23
1.5
42.3
24.0
5600
0.640
6309
45
100
25
1.5
55.3
31.5
5000
0.836
6310
50
110
27
2
65.0
38.0
4500
1.05
6311
55
120
29
2
74.1
45.0
4300
1.35
6312
60
130
31
2.1
85.2
52.0
4000
1.70
6313
65
140
33
2.1
92.3
60.0
3600
2.10
6314
70
150
35
2.1
104
68.0
3400
2.55
6315
75
160
37
2.1
114
76.5
3200
3.00
6316
80
170
39
2.1
124
86.5
3000
3.45
6317
85
180
41
3
133
96.5
2800
4.05
6318
90
190
43
3
143
104
2600
4.65
6319
95
200
45
3
153
118
2400
5.40
6320
100
215
47
3
174
137
2200
6.65
National Equivalents
ISO 15 and DIN 625-1 cover the same bearings with the same dimensions.
This product is supplied against ISO 15 / DIN 625-1 / GB/T 276, which names the documents it is made to.
Catalog Products Governed by GB/T 276
GB/T 276 governs more than this one series. In this catalog it applies to:
Other ways to specify the 6300 Series Deep Groove Ball Bearings
The same part is also governed by DIN 625 and ISO 281, and where two standards cover one dimension they agree — the numbers are the same, the document is not.
Customize the parameters below — every spec field is editable, and the drawing redraws to match the values you choose. Changing the designation snaps the other fields to that size's standard values; you can then override any individual value.
Sends the selected values to the quote form below.
Our facility
Held in production, not just on paper
The tolerances above are decided on the grinding and superfinishing lines in our own plant, and gauged on every ring rather than on a sample. A dimension is only worth quoting if it survives the process that produces it.
Request a Quote
The form below follows the current technical drawing configuration. Change the drawing values above and the request details update automatically.
Dimensions & Specifications (ISO 15 / DIN 625-1 / GB/T 276)
Designation
Bore d (mm)
Outer diameter D (mm)
Width B (mm)
Chamfer r min (mm)
Basic dynamic load rating Cr (kN)
Basic static load rating C0r (kN)
Limiting speed grease (rpm)
Mass (kg)
6300
10
35
11
0.6
8.06
3.40
17000
0.053
6301
12
37
12
1
9.75
4.15
16000
0.060
6302
15
42
13
1
11.4
5.40
14000
0.082
6303
17
47
14
1
14.3
6.55
12000
0.115
6304
20
52
15
1.1
16.8
7.80
10000
0.144
6305
25
62
17
1.1
23.4
11.6
8500
0.232
6306
30
72
19
1.1
29.6
16.0
7000
0.350
6307
35
80
21
1.5
35.1
19.0
6300
0.460
6308
40
90
23
1.5
42.3
24.0
5600
0.640
6309
45
100
25
1.5
55.3
31.5
5000
0.836
6310
50
110
27
2
65.0
38.0
4500
1.05
6311
55
120
29
2
74.1
45.0
4300
1.35
6312
60
130
31
2.1
85.2
52.0
4000
1.70
6313
65
140
33
2.1
92.3
60.0
3600
2.10
6314
70
150
35
2.1
104
68.0
3400
2.55
6315
75
160
37
2.1
114
76.5
3200
3.00
6316
80
170
39
2.1
124
86.5
3000
3.45
6317
85
180
41
3
133
96.5
2800
4.05
6318
90
190
43
3
143
104
2600
4.65
6319
95
200
45
3
153
118
2400
5.40
6320
100
215
47
3
174
137
2200
6.65
Video: GB/T 276 6300 Series Deep Groove Ball Bearings Specification
Third-party video, selected automatically for this topic. It is not produced by Bushing Bearings and is not a specification source — use the tables on this page for dimensional data.
Frequently Asked Questions
What does GB/T 276 specify?
GB/T 276 is the Chinese national standard for the boundary dimensions of single row deep groove ball bearings, identical in the dimensions it fixes to ISO 15 for this bearing type. A 6204 supplied to GB/T 276 mounts in the same seat as one supplied to ISO 15 or DIN 625-1.
What does GB/T 276 not cover?
It fixes dimensions. Load ratings follow GB/T 6391 (equivalent to ISO 281), tolerances GB/T 307.1 (ISO 492) and internal clearance GB/T 4604.1 (ISO 5753-1).
What is the equivalent of GB/T 276?
ISO 15 and DIN 625-1 cover the same bearings with the same dimensions.
Does GB/T 276 mean two bearings are interchangeable?
Dimensionally, yes — that is what a boundary dimension standard is for, and a bearing of the same designation from any maker mounts in the same shaft and housing seat. Functionally, not necessarily: the load rating, the internal design, the cage, the clearance group and the speed limit are decided by the manufacturer and by other standards, and two bearings with the same number are not required to match on any of them.
How do I request a quotation?
Use the technical drawing on this page to pick the exact configuration, then submit it with the quote form. We respond within one business day.
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