Angular Contact Ball Bearings · ISO 15 / DIN 628-1 / GB/T 292
ISO 15 7300B Series Angular Contact Ball Bearings Specification
What ISO 15 fixes, what it deliberately leaves to another document, its equivalents, and the dimensional table.
ISO 15 fixes the boundary dimensions of metric radial rolling bearings: the bore d, the outside diameter D, the width B and the limiting corner radius r, arranged in diameter and width series so that a bore of 20 mm exists in several standard envelopes (6004, 6204, 6304, 6404). It is the reason a 6204 from any manufacturer drops into the same housing.
Standard
ISO 15
Covers
Boundary dimensions of radial rolling bearings
Does not fix
It says nothing about how much load the bearing carries, how fast it may run, how accurately it is made or how much clearance it has. Load ratings are calculated to ISO 281, running accuracy is ISO 492 and radial internal clearance is ISO 5753-1.
Equivalents
DIN 616 restates the dimension plan nationally, with the individual bearing types in DIN 625, DIN 628, DIN 630, DIN 635 and DIN 5412; GB/T 273.3 carries the same plan in China.
Product
7300B Series Angular Contact Ball Bearings
Governing standards
ISO 15 / DIN 628-1 / GB/T 292
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.
ISO 15 covers boundary dimensions of radial rolling bearings. This page sets out what the standard fixes for 7300b series angular contact ball bearings, what it deliberately leaves to other documents, its national equivalents, and the dimensional table supplied against it.
ISO 15 — Scope
ISO 15 fixes the boundary dimensions of metric radial rolling bearings: the bore d, the outside diameter D, the width B and the limiting corner radius r, arranged in diameter and width series so that a bore of 20 mm exists in several standard envelopes (6004, 6204, 6304, 6404). It is the reason a 6204 from any manufacturer drops into the same housing.
What ISO 15 Does Not Fix
It says nothing about how much load the bearing carries, how fast it may run, how accurately it is made or how much clearance it has. Load ratings are calculated to ISO 281, running accuracy is ISO 492 and radial internal clearance is 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 ISO 15
Designation
Bore d (mm)
Outer diameter D (mm)
Width B (mm)
Chamfer r min (mm)
Contact angle a (deg)
7300B
10
35
11
0.6
40
7301B
12
37
12
1
40
7302B
15
42
13
1
40
7303B
17
47
14
1
40
7304B
20
52
15
1.1
40
7305B
25
62
17
1.1
40
7306B
30
72
19
1.1
40
7307B
35
80
21
1.5
40
7308B
40
90
23
1.5
40
7309B
45
100
25
1.5
40
7310B
50
110
27
2
40
7311B
55
120
29
2
40
7312B
60
130
31
2.1
40
7313B
65
140
33
2.1
40
7314B
70
150
35
2.1
40
7315B
75
160
37
2.1
40
7316B
80
170
39
2.1
40
7317B
85
180
41
3
40
7318B
90
190
43
3
40
7319B
95
200
45
3
40
7320B
100
215
47
3
40
National Equivalents
DIN 616 restates the dimension plan nationally, with the individual bearing types in DIN 625, DIN 628, DIN 630, DIN 635 and DIN 5412; GB/T 273.3 carries the same plan in China.
This product is supplied against ISO 15 / DIN 628-1 / GB/T 292, which names the documents it is made to.
Catalog Products Governed by ISO 15
ISO 15 governs more than this one series. In this catalog it applies to:
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
The numbers come off our own machines
Every ring is gauged for bore and outside diameter, every assembly for radial internal clearance to ISO 5753-1, and every finished bearing for vibration. That is why the values on this page are quotable rather than indicative.
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 628-1 / GB/T 292)
Designation
Bore d (mm)
Outer diameter D (mm)
Width B (mm)
Chamfer r min (mm)
Contact angle a (deg)
7300B
10
35
11
0.6
40
7301B
12
37
12
1
40
7302B
15
42
13
1
40
7303B
17
47
14
1
40
7304B
20
52
15
1.1
40
7305B
25
62
17
1.1
40
7306B
30
72
19
1.1
40
7307B
35
80
21
1.5
40
7308B
40
90
23
1.5
40
7309B
45
100
25
1.5
40
7310B
50
110
27
2
40
7311B
55
120
29
2
40
7312B
60
130
31
2.1
40
7313B
65
140
33
2.1
40
7314B
70
150
35
2.1
40
7315B
75
160
37
2.1
40
7316B
80
170
39
2.1
40
7317B
85
180
41
3
40
7318B
90
190
43
3
40
7319B
95
200
45
3
40
7320B
100
215
47
3
40
Video: ISO 15 7300B Series Angular Contact 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
Does ISO 15 fix the load rating?
No. ISO 15 does not set load ratings. Basic dynamic load ratings are calculated to the method of ISO 281 and are declared by the manufacturer; the static rating follows ISO 76.
Which edition of ISO 15 does this table follow?
The table reproduces the dimensions we supply 7300b series angular contact ball bearings to. We do not publish an edition year against it, so where the edition is contractually significant, cite the edition you require on the enquiry and we will confirm it against the table before quoting.
Can I cite the GB/T number instead of the ISO one?
For the boundary dimensions, yes — the GB/T standards restate the ISO dimension plan and a part made to either mounts in the same seat. The safest drawing note gives both, because it stays legible if the supply moves between a Chinese, a European and an international manufacturer.
What does ISO 15 specify?
ISO 15 fixes the boundary dimensions of metric radial rolling bearings: the bore d, the outside diameter D, the width B and the limiting corner radius r, arranged in diameter and width series so that a bore of 20 mm exists in several standard envelopes (6004, 6204, 6304, 6404). It is the reason a 6204 from any manufacturer drops into the same housing.
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.
Need a bearing quote or a spec sheet?Message our engineers on WhatsApp — send a drawing or DIN number and get pricing back fast.Start WhatsApp Chat →
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