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| Parameter | SKF7010 CD/P4ADT50 × 80 × 32 mm | NSK7010AWDB50 × 80 × 32 mm | KOYO7010DB FY50 × 80 × 32 mm |
|---|---|---|---|
| Comparable specifications | |||
| Brand | SKF | NSK | KOYO |
| Designation | 7010 CD/P4ADT | 7010AWDB | 7010DB FY |
| Product family | Super-precision angular contact ball bearings | Angular contact ball bearing | Matched pair / Back-to-back / With machined cage |
| Detailed type | Matched set of two super-precision, high-capacity, d design, single row angular contact ball bearings | Angular contact ball bearings | Angular contact ball bearings |
| Bore diameterd | 50 mm | 50 mm | 50 mm |
| Outside diameterD | 80 mm | 80 mm | 80 mm |
| WidthB | 32 mm | 32 mm | 32 mm |
| Basic dynamic load ratingC | 48.8 kN | 43.5 kN | 48 kN |
| Basic static load ratingC0 | 48 kN | 42 kN | 40.2 kN |
| Fatigue load limitPu | 2.04 kN | — | 2.2 kN |
| Limiting speednG | — | — | 7300 r/min |
| Mass≈m | 0.498 kg | — | 0.58 kg |
| Sealing | Without | — | — |
| Cage | — | Pressed steel | — |
| Bearing material | Bearing steel | — | — |
| Lubricant | None | — | — |
| Boundary dimensions | |||
| Individual bearing widthB | — | 16 mm | — |
| Minimum bearing chamferr min. | — | 1 mm | — |
| Nominal width of two-bearing assembly2B | — | 32 mm | — |
| Minimum secondary bearing chamferr1 min. | — | 0.6 mm | — |
| Classification | |||
| Official Category Path | — | — | Angular contact ball bearings - Matched pair - Back-to-back - With machined cage |
| Official Classification 1 | — | — | Angular contact ball bearings / Matched pair / Back-to-back / With machined cage |
| Construction | |||
| Nominal contact angleα | — | 30 ° | — |
| Standard cage code | — | W | — |
| Optional cage codes — ratings require separate confirmation | — | (M), T,TYN | — |
| Catalogue matching scope | — | DB, DF, DT | — |
| Cage material and construction | — | Pressed steel | — |
| Construction / arrangement | — | Back-to-back matched pair | — |
| Dimensions | |||
| Contact angle | 15.0 ° | — | — |
| Engineering — Abutment dimensions | |||
| Diameter of shaft abutmentd a | min. 54.6 mm | — | — |
| Diameter of shaft abutmentd b | min. 54.6 mm | — | — |
| Diameter of housing abutmentD a | max. 75.4 mm | — | — |
| Diameter of housing abutmentD b | max. 78 mm | — | — |
| Radius of filletr a | max. 1 mm | — | — |
| Radius of filletr b | max. 0.3 mm | — | — |
| Position of oil nozzled n | 61.2 mm | — | — |
| Engineering — Calculation data | |||
| Attainable speed for grease lubrication | To be calculated: Single bearing (17000) x speed reduction factor (see table below) | — | — |
| Attainable speed for oil-air lubrication | To be calculated: Single bearing (28000) x speed reduction factor (see table below) | — | — |
| Contact angleα | 15 ° | — | — |
| Ball diameterD w | 9.525 mm | — | — |
| Number of rowsi | 2 | — | — |
| Number of balls (per bearing)z | 18 | — | — |
| Reference grease quantity (per bearing)G ref | 3.6 cm³ | — | — |
| Engineering — Calculation data — Correction factors for preload calculation | |||
| Correction factor dependent on bearing series and sizef | 1.1 | — | — |
| Correction factor dependent on contact anglef 1 | 1 | — | — |
| Correction factor for hybrid bearingsf HC | 1 | — | — |
| Engineering — Calculation data — Factors for equivalent bearing load calculation | |||
| Calculation factor for equivalent loadsf 0 | 15.4 | — | — |
| Additional factors for equivalent loads | Refer to Notes 1 and 2 below | — | — |
| Engineering — Dimensions | |||
| Shoulder diameter of inner ring (large side face)d 1 | 59.2 mm | — | — |
| Shoulder diameter of inner ring (small side face)d 2 | 59.2 mm | — | — |
| Shoulder diameter of outer ring (large side face)D 1 | 70.8 mm | — | — |
| Chamfer dimensionr 1,2 | min. 1 mm | — | — |
| Chamfer dimensionr 3,4 | min. 0.3 mm | — | — |
| Engineering — Engineering specifications | |||
| Universal matching bearing(s) | No | — | — |
| Load-centre geometry | |||
| Single-bearing effective load centrea | — | 26.8 mm | — |
| Matched-pair load-centre spacinga0 (DB) | — | 53.5 mm | — |
| Logistics | |||
| Product net weight | 0.498 kg | — | — |
| eClass code | 23-05-08-04 | — | — |
| UNSPSC code | 31171531 | — | — |
| Lubrication-qualified speed | |||
| Limiting speed — grease | — | 5600 r/min | — |
| Limiting speed — oil | — | 7500 r/min | — |
| Manufacturer Identity | |||
| Official Class Key | — | — | 020-020-010 |
| Mass reference | |||
| Single-bearing approximate mass (not pair mass) | — | 0.263 kg | — |
| Matched-pair load ratings | |||
| Basic dynamic radial load ratingCr | — | 43500 N | — |
| Basic static radial load ratingC0r | — | 42000 N | — |
| Mounting dimensions — shown arrangement | |||
| Minimum shaft shoulder diameterda min. | — | 56 mm | — |
| Maximum housing shoulder diameterDb max. | — | 75 mm | — |
| Maximum shaft-side fillet radiusra max. | — | 1 mm | — |
| Performance | |||
| Note | Refer to catalogue data or contact SKF for the attainable speeds | — | — |
| Product identity | |||
| Official product category | Super-precision angular contact ball bearings | — | — |
| Official taxonomy path | /products/super-precision-bearings/angular-contact-ball-bearings | — | — |
| Structure group ID | BA1_010 | — | — |
| Available from SKF | Yes | — | — |
| Remanufacturable | No | — | — |
| Properties | |||
| Contact type | Normal contact (two-point contact) | — | — |
| Number of rows | 2 | — | — |
| Ring type | One-piece inner and outer rings | — | — |
| Design | High-capacity D | — | — |
| Universal matching bearing | No | — | — |
| Matched arrangement | Tandem << | — | — |
| Number of bearings in matched set | 2 | — | — |
| Matched condition (axial clearance/ preload) | Not applicable | — | — |
| Tolerance class | P4A | — | — |
| Material, bearing | Bearing steel | — | — |
| Coating | Without | — | — |
| Indicative carbon footprint for new product | 1.8 kg CO 2 e | — | — |
| Technical Data | |||
| d | — | — | 80 mm |
| B | — | — | 32 mm |
| R(Min.) | — | — | 1 mm |
| R1(Min.) | — | — | 0.6 mm |
| Basic Load Ratings : Cr | — | — | 48.0 kN |
| Basic Load Ratings : C0R | — | — | 40.2 kN |
| Fatigue Load Limit : Cu | — | — | 2.20 kN |
| Limiting Speeds(Grease Lub.) | — | — | 7300 min-1 |
| Limiting Speeds(Oil Lub.) | — | — | 9200 min-1 |
| Load Center Spread : A | — | — | 53.8 mm |
| Da(Min.) | — | — | 55.5 mm |
| Db(Max.) | — | — | 75.5 mm |
| Ra(Max.) | — | — | 1 mm |
| Rb(Max.) | — | — | 0.6 mm |
| Mass(Refer.) | — | — | 0.580 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.