Specification summary of GB T 301 as applied to thrust bearing: the dimensions the standard fixes, the full size range supplied, and the related designations commonly cross-referenced.
GB T 301 — Scope
The table below lists the dimensions catalogued for thrust bearing — iso / din (series 110) under GB T 301. The scope of GB T 301 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 301. Tolerances for this part are the limits shown against each dimension in the table.
Dimensions Specified by GB T 301
| Bore d (mm) | Outer diameter D (mm) | Total height H (mm) | Dynamic axial load Ca (kN) | Limit speed (rpm) | Reference standard |
|---|---|---|---|---|---|
| 10 | 24 | 9 | 9.65 | 4000 | ISO 104 / GB/T 301 |
| 15 | 28 | 9 | 11.5 | 3800 | ISO 104 / GB/T 301 |
| 20 | 35 | 10 | 17.0 | 3200 | ISO 104 / GB/T 301 |
| 25 | 42 | 11 | 22.0 | 2800 | ISO 104 / GB/T 301 |
| 30 | 47 | 11 | 27.0 | 2400 | ISO 104 / GB/T 301 |
| 40 | 60 | 13 | 42.5 | 2000 | ISO 104 / GB/T 301 |
| 50 | 70 | 14 | 52.0 | 1700 | ISO 104 / GB/T 301 |
| 60 | 85 | 17 | 70.0 | 1500 | ISO 104 / GB/T 301 |
| 80 | 105 | 19 | 93.0 | 1200 | ISO 104 / GB/T 301 |
Equivalent Standards
Where direct equivalents exist (ISO ↔ DIN, ISO ↔ ASME), they are listed on the parent Thrust Bearing — ISO / DIN (Series 110) page.
Always confirm against the dimensions on this page, since some "equivalent" standards differ in tolerances and head geometry.
Companion Standards
A complete specification for thrust bearing — iso / din (series 110) normally cites several documents: one for the geometry, one for the material or mechanical properties, and one for the finish. GB T 301 is one of them, not all of them.
Custom manufacturing · Made to drawing
Need a bearing & bushing to this standard in a non-standard size?
Parts built to GB T 301 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.
