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| Parameter | SKFSTO 4040 × 80 × mm | INASTO4040 × 80 × 19.8 mm |
|---|---|---|
| Comparable specifications | ||
| Brand | SKF | INA |
| Designation | STO 40 | STO40 |
| Product family | Support rollers (Yoke-type track rollers) | — |
| Detailed type | Support roller (yoke-type track roller), without flange rings | Yoke type track roller |
| Bore diameterd | 40 mm | 40 mm |
| Outside diameterD | 80 mm | 80 mm |
| WidthB | — | 19.8 mm |
| Basic dynamic load ratingC | 23.8 kN | 23.7 kN |
| Basic static load ratingC0 | 39 kN | 40 kN |
| Fatigue load limitPu | 4.75 kN | 6 kN |
| Limiting speednG | 1900 r/min | 850 r/min |
| Mass≈m | 0.53 kg | 0.545 kg |
| Internal clearance | CN | — |
| Sealing | Without | — |
| Cage | With | — |
| Bearing material | Bearing steel | — |
| Lubricant | Grease | — |
| Dimensions | ||
| Functional outside diameter | 80.0 mm | — |
| Width, total | 20.0 mm | — |
| Width, outer ring | 19.8 mm | — |
| Engineering — Calculation data | ||
| Maximum dynamic radial loadF r | max. 34.5 kN | — |
| Maximum static radial loadF 0r | max. 49 kN | — |
| Engineering — Dimensions | ||
| Width outer ringC | 19.8 mm | — |
| Width inner ringB | 20 mm | — |
| Raceway diameter outer ringE | 58 mm | — |
| Raceway diameter inner ringF | 50 mm | — |
| Chamfer dimension outer ringr 1,2 | min. 1 mm | — |
| Chamfer dimension inner ringr 3,4 | min. 1 mm | — |
| Logistics | ||
| Product net weight | 0.53 kg | — |
| eClass code | 23-05-09-03 | — |
| UNSPSC code | 31171512 | — |
| Manufacturer Identity | ||
| Schaeffler Product Code | — | 398676 |
| Base Type | — | STO40 |
| Old Designation | — | ["STO 40"] |
| Gpsd Group | — | I03 |
| Product Line Id | — | 13 |
| X Life Marking | — | n.r. |
| Product identity | ||
| Official product category | Support rollers (Yoke-type track rollers) | — |
| Official taxonomy path | /products/rolling-bearings/track-rollers/support-rollers | — |
| Structure group ID | BNT_002 | — |
| Available from SKF | Yes | — |
| Remanufacturable | No | — |
| Product Identity | ||
| Construction | — | Yoke type track rollers STO.., single row needle roller bearings with particularly thick-walled outer ring, needle roller and cage assembly and an inner ring, without axial guidance of the outer ring, open, inner ring, outer ring and needle roller and cage assembly can be mounted separately |
| Short Description | — | Yoke type track roller |
| Properties | ||
| Bearing part | Complete track roller | — |
| Rolling elements | Needle rollers | — |
| Number of rows | 1 | — |
| Outer ring profile | Crowned | — |
| Axial guidance of outer ring | No | — |
| Number of flanges, outer ring | 0 | — |
| Radial internal clearance | CN | — |
| Tolerance class | Other | — |
| Material, bearing | Bearing steel | — |
| Coating | Without | — |
| Relubrication feature | With | — |
| Technical Data | ||
| Bore Diameter (D) | — | 40 mm |
| Outside Diamater (D) | — | 80 mm |
| Width, Outer Ring (C) | — | 19.8 mm |
| Basic Dynamic Load Rating, Radial (Cr W) | — | 23,700 N |
| Basic Static Load Rating, Radial (C0R W) | — | 40,000 N |
| Raceway Diameter Inner Ring (F) | — | 50 mm |
| Speed On Permanent Grease Lubrication (Nd G) | — | 850 1/min |
| Width Inner Ring (B) | — | 20 mm |
| Radius Of Outer Ring Outside Profile (R) | — | 500 mm |
| Fatigue Load Limit, Radial (Cur W) | — | 6,000 N |
| Minimum Chamfer Dimension (Rmin) | — | 1 mm |
| Raceway Diameter Outer Ring (E) | — | 58 mm |
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.