Tapered Roller Bearings · ISO 355 / DIN ISO 355 / GB/T 297
GB/T 297 32200 Series Tapered Roller Bearings Specification
What GB/T 297 fixes, what it deliberately leaves to another document, its equivalents, and the dimensional table.
GB/T 297 is the Chinese national standard for the boundary dimensions of metric tapered roller bearings, restating the ISO 355 plan: bore, outside diameter, assembled width T and the separate cone and cup widths.
Standard
GB/T 297
Covers
Tapered roller bearings, boundary dimensions
Does not fix
It does not cover the mounted setting, and it does not rate the bearing; GB/T 6391 (ISO 281) does that.
Equivalents
ISO 355, DIN ISO 355 and DIN 720 cover the same envelope.
Product
32200 Series Tapered Roller Bearings
Governing standards
ISO 355 / DIN ISO 355 / GB/T 297
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.
Specification summary of GB/T 297 (tapered roller bearings, boundary dimensions) as it applies to 32200 series tapered roller bearings: what the document fixes, where its scope ends, the ISO, DIN and GB/T equivalents, and the dimensions supplied to it.
GB/T 297 — Scope
GB/T 297 is the Chinese national standard for the boundary dimensions of metric tapered roller bearings, restating the ISO 355 plan: bore, outside diameter, assembled width T and the separate cone and cup widths.
What GB/T 297 Does Not Fix
It does not cover the mounted setting, and it does not rate the bearing; GB/T 6391 (ISO 281) does that.
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 297
Designation
Bore d (mm)
Outer diameter D (mm)
Assembled width T (mm)
Width B (mm)
Width C (mm)
Contact angle a (deg)
Chamfer r min (mm)
32204
20
47
19.25
18
15
12.95
1
32205
25
52
19.25
18
16
14.04
1
32206
30
62
21.25
20
17
14.04
1
32207
35
72
24.25
23
19
14.04
1.5
32208
40
80
24.75
23
19
14.04
1.5
32209
45
85
24.75
23
19
15.11
1.5
32210
50
90
24.75
23
19
15.64
1.5
32211
55
100
26.75
25
21
15.11
2
32212
60
110
29.75
28
24
15.11
2
32213
65
120
32.75
31
27
15.11
2
32214
70
125
33.25
31
27
15.11
2
32215
75
130
33.25
31
27
16.17
2
32216
80
140
35.25
33
28
15.64
2.5
32217
85
150
38.5
36
30
15.64
2.5
32218
90
160
42.5
40
34
15.64
2.5
32219
95
170
45.5
43
37
15.64
3
32220
100
180
49
46
39
15.64
3
National Equivalents
ISO 355, DIN ISO 355 and DIN 720 cover the same envelope.
This product is supplied against ISO 355 / DIN ISO 355 / GB/T 297, which names the documents it is made to.
Catalog Products Governed by GB/T 297
GB/T 297 governs more than this one series. In this catalog it applies to:
Other ways to specify the 32200 Series Tapered Roller Bearings
The same part is also governed by ISO 355 and DIN 720, 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
Where these dimensions are actually made
Ring forging, heat treatment, raceway grinding and superfinishing all happen under one roof, so a bore tolerance and a clearance group are set by processes we control and can evidence, not by whichever supplier had stock.
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 355 / DIN ISO 355 / GB/T 297)
Designation
Bore d (mm)
Outer diameter D (mm)
Assembled width T (mm)
Width B (mm)
Width C (mm)
Contact angle a (deg)
Chamfer r min (mm)
32204
20
47
19.25
18
15
12.95
1
32205
25
52
19.25
18
16
14.04
1
32206
30
62
21.25
20
17
14.04
1
32207
35
72
24.25
23
19
14.04
1.5
32208
40
80
24.75
23
19
14.04
1.5
32209
45
85
24.75
23
19
15.11
1.5
32210
50
90
24.75
23
19
15.64
1.5
32211
55
100
26.75
25
21
15.11
2
32212
60
110
29.75
28
24
15.11
2
32213
65
120
32.75
31
27
15.11
2
32214
70
125
33.25
31
27
15.11
2
32215
75
130
33.25
31
27
16.17
2
32216
80
140
35.25
33
28
15.64
2.5
32217
85
150
38.5
36
30
15.64
2.5
32218
90
160
42.5
40
34
15.64
2.5
32219
95
170
45.5
43
37
15.64
3
32220
100
180
49
46
39
15.64
3
Video: GB/T 297 32200 Series Tapered Roller 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
Which edition of GB/T 297 does this table follow?
The table reproduces the dimensions we supply 32200 series tapered roller 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 GB/T 297 specify?
GB/T 297 is the Chinese national standard for the boundary dimensions of metric tapered roller bearings, restating the ISO 355 plan: bore, outside diameter, assembled width T and the separate cone and cup widths.
What does GB/T 297 not cover?
It does not cover the mounted setting, and it does not rate the bearing; GB/T 6391 (ISO 281) does that.
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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