31308 Tapered Roller Bearing – High Contact Angle Design
UMZ 31308 is a single-row metric tapered roller bearing featuring a high contact angle and dimensions of 40×90×25.25 mm. Designed for combined radial and axial loads, its bearing geometry is particularly suited to arrangements requiring substantial axial load support. The bearing features a separable cone and cup construction for flexible mounting and adjustment.
Product Description
31308 Metric Tapered Roller Bearing
High Contact Angle Tapered Roller Bearing
The UMZ 31308 is a single-row metric tapered roller bearing belonging to the ISO 355 dimension series 7FB.
Unlike conventional tapered roller bearings with smaller contact angles, the 31308 features a steeper roller and raceway geometry. This design allows the bearing to accommodate a relatively higher proportion of axial load while continuing to support radial loads.
Its separable inner ring assembly and outer ring facilitate installation and allow axial clearance or preload to be established through the bearing arrangement.
Dimensional Data
| Specification | Value |
|---|---|
| Bearing Designation | 31308 |
| Brand | UMZ/neutral/others |
| Bearing Type | Single-Row Tapered Roller Bearing |
| Dimension Series | ISO 355 – 7FB |
| Bore Diameter (d) | 40 mm |
| Outside Diameter (D) | 90 mm |
| Overall Width (T) | 25.25 mm |
| Inner Ring Width (B) | 23 mm |
| Outer Ring Width (C) | 17 mm |
| Inner Ring Chamfer (min.) | 2 mm |
| Outer Ring Chamfer (min.) | 1.5 mm |
| Reference Weight | Approx. 0.72 kg |
Bearing Selection Notes
When specifying 31308 for a new design or replacement application, pay particular attention to the required axial load direction, bearing arrangement, shaft and housing dimensions, lubrication, and axial setting.
Where axial loads act in both directions, an appropriate opposed bearing arrangement is required.
Request a Quotation
Contact UMZ Bearing for 31308 tapered roller bearing pricing, bulk orders, and customized bearing marking or packaging requirements.
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