Metric single-row tapered roller bearings
30256 Tapered Roller Bearing Dimensions & Specifications
30256 tapered roller bearing: 280 mm bore (d), 500 mm outside diameter (D), 89 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 | 280 mm |
|---|---|
| Outside diameter D | 500 mm |
| Overall width T | 89 mm |
| Inner-ring width B | 80 mm |
| Outer-ring width C | 67 mm |
| Mass | 66.3 kg |
| Catalogue dynamic load Cr | 1240 kN |
| Catalogue static load Cor | 1900 kN |
Mounting dimensions & additional parameters (12)
| Abutment dimension Da Da | 456 mm |
|---|---|
| Abutment dimension Db Db | 478 mm |
| Abutment dimension da da | 336 mm |
| Abutment dimension db db | 313 mm |
| Minimum chamfer r12 r12 | 6 mm |
| Minimum chamfer r34 r34 | 5 mm |
| Factor Y Y | 1.4 |
| Factor Y0 Y0 | 0.74 |
| Factor e e | 0.44 |
| Maximum fillet ra ra | 5 mm |
| Maximum fillet rb rb | 4 mm |
| Load centre dimension a a | 98.5 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 30256?
For 30256, the complete bearing width T is 89 mm; the inner-ring width B is 80 mm. The outer-ring width C is 67 mm. Check T against the assembly drawing; the separate ring widths describe different parts.
Which mounting dimensions are listed for 30256?
The 30256 catalogue lists da = 336 mm; Da = 456 mm; ra ≤ 5 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 30256?
The catalogue reference mass for 30256 is 66.3 kg. Confirm the supplied assembly and packed shipment weight separately when planning handling or transport.