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| Parameter | SKF640420 × 72 × 19 mm | KOYO640420 × 72 × 19 mm |
|---|---|---|
| Comparable specifications | ||
| Brand | SKF | KOYO |
| Designation | 6404 | 6404 |
| Product family | Deep groove ball bearings | Single-row / Open type |
| Detailed type | Deep groove ball bearings | Deep groove ball bearings |
| Bore diameterd | 20 mm | 20 mm |
| Outside diameterD | 72 mm | 72 mm |
| WidthB | 19 mm | 19 mm |
| Basic dynamic load ratingC | 30.7 kN | 38.7 kN |
| Basic static load ratingC0 | 15 kN | 15.2 kN |
| Fatigue load limitPu | 0.64 kN | 1.5 kN |
| Reference speednref | 24000 r/min | — |
| Limiting speednG | 15000 r/min | 11000 r/min |
| Mass≈m | 0.4 kg | 0.4 kg |
| Precision class | Normal | — |
| Internal clearance | CN | — |
| Sealing | Without | Open |
| Cage | Sheet metal | — |
| Bearing material | Bearing steel | — |
| Lubricant | None | — |
| Classification | ||
| Official Category Path | — | Deep groove ball bearings - Single-row - Open type |
| Official Classification 1 | — | Deep groove ball bearings / Single-row / Open type |
| Engineering — Abutment dimensions | ||
| Diameter of shaft abutmentd a | min. 29 mm | — |
| Diameter of housing abutmentD a | max. 63 mm | — |
| Radius of shaft or housing filletr a | max. 1 mm | — |
| Engineering — Calculation data | ||
| Minimum load factork r | 0.04 | — |
| Calculation factorf 0 | 11 | — |
| Engineering — Dimensions | ||
| Deviation limits of mid-range bore diametert Δdmp | -0.01 to 0 mm | — |
| Deviation limits of mid-range outside diametert ΔDmp | -0.013 to 0 mm | — |
| Deviation limits of ring widtht ΔBs | -0.12 to 0 mm | — |
| Shoulder diameterd 1 | ≈ 54.75 mm | — |
| Chamfer dimensionr 1,2 | min. 1.1 mm | — |
| ISO tolerance class for dimensions | Normal | — |
| Engineering — Tolerances of run-out | ||
| Range of section height at inner ring of assembled bearingt Kia | 13 µm | — |
| Range of section height at outer ring of assembled bearingt Kea | 25 µm | — |
| ISO tolerance class for geometrical tolerances | Normal | — |
| Logistics | ||
| Product net weight | 0.4 kg | — |
| eClass code | 23-05-08-01 | — |
| UNSPSC code | 31171504 | — |
| Manufacturer Identity | ||
| Official Class Key | — | 010-010-010 |
| 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 | — |
| Properties | ||
| Filling slots | Without | — |
| Number of rows | 1 | — |
| 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 | 1.5 kg CO 2 e | — |
| Technical Data | ||
| d | — | 72 mm |
| B | — | 19 mm |
| R(Min.) | — | 1.1 mm |
| Basic Load Ratings : Cr | — | 38.7 kN |
| Basic Load Ratings : C0R | — | 15.2 kN |
| Fatigue Load Limit : Cu | — | 1.50 kN |
| Factor : F0 | — | 11.1 |
| Limiting Speeds(Grease Lub.) | — | 11000 min-1 |
| Limiting Speeds(Oil Lub.) | — | 13000 min-1 |
| Da(Min.) | — | 26.5 mm |
| Da(Max.) | — | 65.5 mm |
| Ra(Max.) | — | 1 mm |
| Mass(Refer.) | — | 0.400 kg |
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.