GB T 297 is the standard cited for tapered roller bearing. This page sets out what the standard controls for this part, reproduces the dimensional table supplied against it, and notes the related designations referenced on drawings.
GB T 297 — Scope
The table below lists the dimensions catalogued for tapered roller bearing — iso / din (series 116) under GB T 297. The scope of GB T 297 itself is not summarised here — where a figure matters, confirm it against the published document.
Tolerance & Product Grades
Product grade is a concept from dimensional fastener standards and does not apply to GB T 297. Tolerances for this part are the limits shown against each dimension in the table.
Dimensions Specified by GB T 297
| Bore d (mm) | Outer diameter D (mm) | Total width T (mm) | Cone angle (deg) | Dynamic load C (kN) | Reference standard |
|---|---|---|---|---|---|
| 20 | 47 | 15.25 | 15 | 30.0 | ISO 355 / GB/T 297 |
| 25 | 52 | 16.25 | 15 | 34.0 | ISO 355 / GB/T 297 |
| 30 | 62 | 17.25 | 15 | 49.5 | ISO 355 / GB/T 297 |
| 35 | 72 | 18.25 | 15 | 69.0 | ISO 355 / GB/T 297 |
| 40 | 80 | 19.75 | 15 | 81.5 | ISO 355 / GB/T 297 |
| 50 | 90 | 21.75 | 15 | 93.0 | ISO 355 / GB/T 297 |
| 60 | 110 | 23.75 | 15 | 142 | ISO 355 / GB/T 297 |
| 80 | 140 | 28.25 | 15 | 224 | ISO 355 / GB/T 297 |
Companion Standards
A complete specification for tapered roller bearing — iso / din (series 116) normally cites several documents: one for the geometry, one for the material or mechanical properties, and one for the finish. GB T 297 is one of them, not all of them.
When to Specify GB T 297
Choose GB T 297 for international engineering work and OEM supply where ISO standards are the contractual reference. It is the default modern specification for tapered roller bearing — iso / din (series 116).
Custom manufacturing · Made to drawing
Need a bearing & bushing to this standard in a non-standard size?
Parts built to GB T 297 are already in the catalog, so a special is usually a variation on existing tooling rather than a new design — which is what keeps the cost down.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
