Metric single-row tapered roller bearings
31328 Tapered Roller Bearing Dimensions & Specifications
31328 tapered roller bearing: 140 mm bore (d), 300 mm outside diameter (D), 77 mm overall width (T). Review the available technical values below. Matching dimensions alone do not confirm interchangeability between designations or suffixes.
Technical specifications
| Bore d | 140 mm |
|---|---|
| Outside diameter D | 300 mm |
| Overall width T | 77 mm |
| Inner-ring width B | 70 mm |
| Outer-ring width C | 47 mm |
| Mass | 23.8 kg |
| Catalogue dynamic load Cr | 670 kN |
| Catalogue static load Cor | 950 kN |
Mounting dimensions & additional parameters (12)
| Abutment dimension Da Da | 282 mm |
|---|---|
| Abutment dimension Db Db | 280 mm |
| Abutment dimension da da | 158 mm |
| Abutment dimension db db | 169 mm |
| Minimum chamfer r12 r12 | 5 mm |
| Minimum chamfer r34 r34 | 4 mm |
| Factor Y Y | 0.7 |
| Factor Y0 Y0 | 0.4 |
| Factor e e | 0.83 |
| Maximum fillet ra ra | 3 mm |
| Maximum fillet rb rb | 3 mm |
| Load centre dimension a a | 94 mm |
Fields without confirmed values are omitted. Final supply configuration and application suitability require technical confirmation.
Selection & installation
Which width should I use when checking 31328?
For 31328, the complete bearing width T is 77 mm; the inner-ring width B is 70 mm. The outer-ring width C is 47 mm. Check T against the assembly drawing; the separate ring widths describe different parts.
Which mounting dimensions are listed for 31328?
The 31328 catalogue lists da = 158 mm; Da = 282 mm; ra ≤ 3 mm. Check these symbols against the bearing drawing and the shaft/housing shoulders; they are not shaft or housing fit tolerances.
What is the reference mass of 31328?
The catalogue reference mass for 31328 is 23.8 kg. Confirm the supplied assembly and packed shipment weight separately when planning handling or transport.