Metric single-row tapered roller bearings
31321 Tapered Roller Bearing Dimensions & Specifications
31321 tapered roller bearing: 105 mm bore (d), 225 mm outside diameter (D), 58 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 | 105 mm |
|---|---|
| Outside diameter D | 225 mm |
| Overall width T | 58 mm |
| Inner-ring width B | 53 mm |
| Outer-ring width C | 36 mm |
| Mass | 9.72 kg |
| Catalogue dynamic load Cr | 397 kN |
| Catalogue static load Cor | 489 kN |
Mounting dimensions & additional parameters (12)
| Abutment dimension Da Da | 193 mm |
|---|---|
| Abutment dimension Db Db | 211 mm |
| Abutment dimension da da | 123 mm |
| Abutment dimension db db | 126 mm |
| Minimum chamfer r12 r12 | 4 mm |
| Minimum chamfer r34 r34 | 3 mm |
| Factor Y Y | 0.73 |
| Factor Y0 Y0 | 0.4 |
| Factor e e | 0.83 |
| Maximum fillet ra ra | 3 mm |
| Maximum fillet rb rb | 2.5 mm |
| Load centre dimension a a | 70.3 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 31321?
For 31321, the complete bearing width T is 58 mm; the inner-ring width B is 53 mm. The outer-ring width C is 36 mm. Check T against the assembly drawing; the separate ring widths describe different parts.
Which mounting dimensions are listed for 31321?
The 31321 catalogue lists da = 123 mm; Da = 193 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 31321?
The catalogue reference mass for 31321 is 9.72 kg. Confirm the supplied assembly and packed shipment weight separately when planning handling or transport.