Self-Aligning Ball Bearings · ISO 15 / GB/T 281 / DIN 630
ISO 5753-1 1300K Series Tapered Bore Self-Aligning Ball Bearings Specification
What ISO 5753-1 fixes, what it deliberately leaves to another document, its equivalents, and the dimensional table.
ISO 5753-1 tabulates the radial internal clearance of unmounted radial bearings by bore range and clearance group — C2, CN (normal, and usually left out of the designation), C3, C4 and C5. The clearance is measured before mounting; the interference fits used on the shaft and in the housing, plus any temperature difference across the bearing, consume part of it in service.
Standard
ISO 5753-1
Covers
Radial internal clearance
Does not fix
It is not a tolerance class and it is not a fit table: how much of the listed clearance survives mounting depends on the shaft and housing fits chosen to ISO 286, which the standard does not prescribe.
Equivalents
GB/T 4604.1 is the Chinese equivalent; the values for tapered-bore and for non-ball types are given in the standard's own separate tables.
Product
1300K Series Tapered Bore Self-Aligning Ball Bearings
Governing standards
ISO 15 / GB/T 281 / DIN 630
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 5753-1 covers radial internal clearance. This page sets out what the standard fixes for 1300k series tapered bore self-aligning ball bearings, what it deliberately leaves to other documents, its national equivalents, and the dimensional table supplied against it.
ISO 5753-1 — Scope
ISO 5753-1 tabulates the radial internal clearance of unmounted radial bearings by bore range and clearance group — C2, CN (normal, and usually left out of the designation), C3, C4 and C5. The clearance is measured before mounting; the interference fits used on the shaft and in the housing, plus any temperature difference across the bearing, consume part of it in service.
What ISO 5753-1 Does Not Fix
It is not a tolerance class and it is not a fit table: how much of the listed clearance survives mounting depends on the shaft and housing fits chosen to ISO 286, which the standard does not prescribe.
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 5753-1
Designation
Bore d (mm)
Outer diameter D (mm)
Width B (mm)
Chamfer r min (mm)
Bore taper
Adapter sleeve
Permissible misalignment (deg)
1305K
25
62
17
1.1
1:12
H305
2.5
1306K
30
72
19
1.1
1:12
H306
2.5
1307K
35
80
21
1.5
1:12
H307
2.5
1308K
40
90
23
1.5
1:12
H308
2.5
1309K
45
100
25
1.5
1:12
H309
2.5
1310K
50
110
27
2
1:12
H310
2.5
1311K
55
120
29
2
1:12
H311
2.5
1312K
60
130
31
2.1
1:12
H312
2.5
1313K
65
140
33
2.1
1:12
H313
2.5
1314K
70
150
35
2.1
1:12
H314
2.5
1315K
75
160
37
2.1
1:12
H315
2.5
1316K
80
170
39
2.1
1:12
H316
2.5
1317K
85
180
41
3
1:12
H317
2.5
1318K
90
190
43
3
1:12
H318
2.5
1319K
95
200
45
3
1:12
H319
2.5
1320K
100
215
47
3
1:12
H320
2.5
National Equivalents
GB/T 4604.1 is the Chinese equivalent; the values for tapered-bore and for non-ball types are given in the standard's own separate tables.
This product is supplied against ISO 15 / GB/T 281 / DIN 630, which names the documents it is made to.
When to Cite ISO 5753-1
ISO 5753-1 is the international reference and the right one to cite on a new drawing or a purchase specification. Adding the national equivalents alongside it costs nothing and makes the requirement legible to a supplier working to DIN or to GB/T.
Other ways to specify the 1300K Series Tapered Bore Self-Aligning Ball Bearings
The same part is also governed by ISO 15, 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 / GB/T 281 / DIN 630)
Designation
Bore d (mm)
Outer diameter D (mm)
Width B (mm)
Chamfer r min (mm)
Bore taper
Adapter sleeve
Permissible misalignment (deg)
1305K
25
62
17
1.1
1:12
H305
2.5
1306K
30
72
19
1.1
1:12
H306
2.5
1307K
35
80
21
1.5
1:12
H307
2.5
1308K
40
90
23
1.5
1:12
H308
2.5
1309K
45
100
25
1.5
1:12
H309
2.5
1310K
50
110
27
2
1:12
H310
2.5
1311K
55
120
29
2
1:12
H311
2.5
1312K
60
130
31
2.1
1:12
H312
2.5
1313K
65
140
33
2.1
1:12
H313
2.5
1314K
70
150
35
2.1
1:12
H314
2.5
1315K
75
160
37
2.1
1:12
H315
2.5
1316K
80
170
39
2.1
1:12
H316
2.5
1317K
85
180
41
3
1:12
H317
2.5
1318K
90
190
43
3
1:12
H318
2.5
1319K
95
200
45
3
1:12
H319
2.5
1320K
100
215
47
3
1:12
H320
2.5
Video: ISO 5753-1 1300K Series Tapered Bore Self-Aligning 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 is the equivalent of ISO 5753-1?
GB/T 4604.1 is the Chinese equivalent; the values for tapered-bore and for non-ball types are given in the standard's own separate tables.
Does ISO 5753-1 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.
Does ISO 5753-1 fix the load rating?
No. ISO 5753-1 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 5753-1 does this table follow?
The table reproduces the dimensions we supply 1300k series tapered bore self-aligning 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.
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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