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| Parameter | SKF30840 × 90 × 23 mm | INA308-NPP-B40 × 90 × 23 mm | TIMKEN308W40 × 90 × 23 mm |
|---|---|---|---|
| Comparable specifications | |||
| Brand | SKF | INA | TIMKEN |
| Designation | 308 | 308-NPP-B | 308W |
| Product family | Deep groove ball bearings | — | Radial Deep-Groove Ball |
| Detailed type | Deep groove ball bearing with filling slots | Self-aligning deep groove ball bearings | Deep groove ball bearings |
| Series | — | 308 | 300 |
| Bore diameterd | 40 mm | 40 mm | 40 mm |
| Outside diameterD | 90 mm | 90 mm | 90 mm |
| WidthB | 23 mm | 23 mm | 23 mm |
| Basic dynamic load ratingC | 45.7 kN | 47 kN | 58.1 kN |
| Basic static load ratingC0 | 36 kN | 26 kN | 39.1 kN |
| Fatigue load limitPu | 1.53 kN | — | — |
| Reference speednref | 14000 r/min | — | — |
| Limiting speednG | 8500 r/min | — | — |
| Mass≈m | 0.671 kg | 0.63 kg | 0.62 kg |
| Internal clearance | CN | — | — |
| Sealing | Without | — | Open |
| Cage | Sheet metal | — | Steel cage |
| Bearing material | Bearing steel | — | — |
| Lubricant | None | — | — |
| Minimum operating temperatureTmin | — | -20 °C | — |
| Maximum operating temperatureTmax | — | 100 °C | — |
| Calculation Factors | |||
| K Factor | — | — | 0.00 |
| Y1 Factor | — | — | 0.00 |
| Y2 Factor | — | — | 0.00 |
| Y0 Factor | — | — | 0.50 |
| E Factor | — | — | 0.00 |
| Cg Factor | — | — | 0.0425 |
| Engineering — Abutment dimensions | |||
| Diameter of shaft abutmentd a | min. 49 mm | — | — |
| Diameter of housing abutmentD a | max. 81 mm | — | — |
| Radius of shaft or housing filletr a | max. 1.5 mm | — | — |
| Engineering — Calculation data | |||
| Minimum load factork r | 0.05 | — | — |
| Engineering — Dimensions | |||
| Shoulder diameterd 1 | ≈ 56.11 mm | — | — |
| Recess diameterD 2 | ≈ 77.7 mm | — | — |
| Chamfer dimensionr 1,2 | min. 1.5 mm | — | — |
| Logistics | |||
| Product net weight | 0.671 kg | — | — |
| eClass code | 23-05-08-01 | — | — |
| UNSPSC code | 31171504 | — | — |
| Manufacturer Identity | |||
| Schaeffler Product Code | — | 357191 | — |
| Material Number | — | — | 000000000100155239 |
| Base Type | — | 308 | — |
| World Assembly Part Number | — | — | 308W |
| Gpsd Group | — | I04 | — |
| Upc | — | — | 0087796042780 |
| Product Line Id | — | 72 | — |
| X Life Marking | — | n.r. | — |
| Official Source System | — | — | CORE BP - DS DF |
| Official Last Run | — | — | 2026-08-23T20:02:46.157 |
| Product identity | |||
| Official product category | Deep groove ball bearings | — | — |
| Official taxonomy path | /products/rolling-bearings/ball-bearings/deep-groove-ball-bearings | — | — |
| Structure group ID | BB1_001_101 | — | — |
| Available from SKF | Yes | — | — |
| Remanufacturable | No | — | — |
| Product Identity | |||
| Type Description | — | — | Radial Deep-Groove Ball |
| Construction | — | — | Single Row Deep Groove Ball Bearing | Imperial Series | 1.5748 in Bore | 3.5433 in OD | 0.9060 in Width | Open | Cylindrical Bore | Steel Cage | C0 Clearance | ISO P0 Tolerance |
| Short Description | — | Self-aligning deep groove ball bearings | — |
| Number Of Rows | 1 | — | 1 |
| Tapered Bore | — | — | N |
| Properties | |||
| Filling slots | With | — | — |
| Locating feature, bearing outer ring | Without | — | — |
| Bore type | Cylindrical | — | — |
| Matched arrangement | No | — | — |
| Radial internal clearance | CN | — | — |
| Material, bearing | Bearing steel | — | — |
| Coating | Without | — | — |
| Relubrication feature | Without | — | — |
| Indicative carbon footprint for new product | 2.5 kg CO 2 e | — | — |
| Technical Data | |||
| Overall Width | — | — | 0.000 mm |
| Bore Diameter (D) | — | 40 mm | — |
| Radial Rating | — | — | 64,400 N |
| Outside Diameter (Dsp) | — | 90 mm | — |
| Axial Rating | — | — | 0 N |
| Width, Inner Ring (B) | — | 23 mm | — |
| Dynamic Rating C1 | — | — | 58,100 N |
| Basic Dynamic Load Rating, Radial (Cr) | — | 47,000 N | — |
| Dynamic Rating C90 | — | — | 0 N |
| Basic Static Load Rating, Radial (C0R) | — | 26,000 N | — |
| Dynamic Axial Rating Ca90 | — | — | 0 N |
| Operating Temperature Min. (Tmin) | — | -20 °C | — |
| Dynamic Axial Rating Ca1 | — | — | 0 N |
| Operating Temperature Max. (Tmax) | — | 100 °C | — |
| Static Radial Rating C0 | — | — | 39,100 N |
| Rib Diameter Sealing Inner Ring (D2) | — | 55.6 mm | — |
| Extended Dynamic Rating Ce | — | — | 64,400 N |
| Minimum Chamfer Dimension (Rmin) | — | 0.6 mm | — |
| Static Axial Rating C0A | — | — | 0 N |
Independent reference comparison based on the manufacturer data currently loaded. Always verify current limits, tolerances and suffix definitions with the official source before engineering selection.