Cross-brand designation analysis
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Same-model Comparison
Explore products that share a base designation across loaded brands, with dimensional agreement and data gaps shown clearly.
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One base designation across loaded brands
Exact designations rank first. Dimensions, suffixes and other technical differences remain visible so the result is not mistaken for an interchangeability declaration.
Dimensions verified
“7018” across 3 loaded brands
At least two brands share the same bore, outside diameter and width. Use Custom Compare when you want to choose exact suffix variants yourself.
Technical comparison
Choose exact variants instead →Brand differences at a glance
| Parameter | SKF7018 ACD/P4ADT90 × 140 × 48 mm | NSK7018AWDB90 × 140 × 48 mm | KOYO7018DB FY90 × 140 × 48 mm |
|---|---|---|---|
| Comparable specifications | |||
| Brand | SKF | NSK | KOYO |
| Designation | 7018 ACD/P4ADT | 7018AWDB | 7018DB 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 | 90 mm | 90 mm | 90 mm |
| Outside diameterD | 140 mm | 140 mm | 140 mm |
| WidthB | 48 mm | 48 mm | 48 mm |
| Basic dynamic load ratingC | 121 kN | 120 kN | 132 kN |
| Basic static load ratingC0 | 143 kN | 133 kN | 127 kN |
| Fatigue load limitPu | 5.7 kN | — | 6.45 kN |
| Limiting speednG | — | — | 4100 r/min |
| Mass≈m | 2.28 kg | — | 2.52 kg |
| Sealing | Without | — | — |
| Cage | — | Pressed steel | — |
| Bearing material | Bearing steel | — | — |
| Lubricant | None | — | — |
| Boundary dimensions | |||
| Individual bearing widthB | — | 24 mm | — |
| Minimum bearing chamferr min. | — | 1.5 mm | — |
| Nominal width of two-bearing assembly2B | — | 48 mm | — |
| Minimum secondary bearing chamferr1 min. | — | 1 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 | 25.0 ° | — | — |
| Engineering — Abutment dimensions | |||
| Diameter of shaft abutmentd a | min. 97 mm | — | — |
| Diameter of shaft abutmentd b | min. 97 mm | — | — |
| Diameter of housing abutmentD a | max. 133 mm | — | — |
| Diameter of housing abutmentD b | max. 136 mm | — | — |
| Radius of filletr a | max. 1.5 mm | — | — |
| Radius of filletr b | max. 1 mm | — | — |
| Position of oil nozzled n | 108.7 mm | — | — |
| Engineering — Calculation data | |||
| Attainable speed for grease lubrication | To be calculated: Single bearing (8500) x speed reduction factor (see table below) | — | — |
| Attainable speed for oil-air lubrication | To be calculated: Single bearing (13000) x speed reduction factor (see table below) | — | — |
| Contact angleα | 25 ° | — | — |
| Ball diameterD w | 15.875 mm | — | — |
| Number of rowsi | 2 | — | — |
| Number of balls (per bearing)z | 20 | — | — |
| Reference grease quantity (per bearing)G ref | 15 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 | 0.99 | — | — |
| Correction factor for hybrid bearingsf HC | 1 | — | — |
| Engineering — Calculation data — Factors for equivalent bearing load calculation | |||
| Calculation factore | 0.68 | — | — |
| Axial load factor (single, tandem)Y 1 | 0 | — | — |
| Axial load factor (single, tandem)Y 2 | 0.87 | — | — |
| Axial load factor (single, tandem)Y 0 | 0.38 | — | — |
| Radial load factor (single, tandem)X 1 | 1 | — | — |
| Radial load factor (single, tandem)X 2 | 0.41 | — | — |
| Radial load factor (single, tandem)X 0 | 0.5 | — | — |
| Engineering — Dimensions | |||
| Shoulder diameter of inner ring (large side face)d 1 | 105.4 mm | — | — |
| Shoulder diameter of inner ring (small side face)d 2 | 105.4 mm | — | — |
| Shoulder diameter of outer ring (large side face)D 1 | 124.6 mm | — | — |
| Chamfer dimensionr 1,2 | min. 1.5 mm | — | — |
| Chamfer dimensionr 3,4 | min. 1 mm | — | — |
| Engineering — Engineering specifications | |||
| Universal matching bearing(s) | No | — | — |
| Load-centre geometry | |||
| Single-bearing effective load centrea | — | 45.2 mm | — |
| Matched-pair load-centre spacinga0 (DB) | — | 90.4 mm | — |
| Logistics | |||
| Product net weight | 2.28 kg | — | — |
| eClass code | 23-05-08-04 | — | — |
| UNSPSC code | 31171531 | — | — |
| Lubrication-qualified speed | |||
| Limiting speed — grease | — | 3200 r/min | — |
| Limiting speed — oil | — | 4300 r/min | — |
| Manufacturer Identity | |||
| Official Class Key | — | — | 020-020-010 |
| Mass reference | |||
| Single-bearing approximate mass (not pair mass) | — | 1.19 kg | — |
| Matched-pair load ratings | |||
| Basic dynamic radial load ratingCr | — | 120000 N | — |
| Basic static radial load ratingC0r | — | 133000 N | — |
| Mounting dimensions — shown arrangement | |||
| Minimum shaft shoulder diameterda min. | — | 99 mm | — |
| Maximum housing shoulder diameterDb max. | — | 134 mm | — |
| Maximum shaft-side fillet radiusra max. | — | 1.5 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 | 8.4 kg CO 2 e | — | — |
| Technical Data | |||
| d | — | — | 140 mm |
| B | — | — | 48 mm |
| R(Min.) | — | — | 1.5 mm |
| R1(Min.) | — | — | 1 mm |
| Basic Load Ratings : Cr | — | — | 132 kN |
| Basic Load Ratings : C0R | — | — | 127 kN |
| Fatigue Load Limit : Cu | — | — | 6.45 kN |
| Limiting Speeds(Grease Lub.) | — | — | 4100 min-1 |
| Limiting Speeds(Oil Lub.) | — | — | 5100 min-1 |
| Load Center Spread : A | — | — | 90.4 mm |
| Da(Min.) | — | — | 98.5 mm |
| Db(Max.) | — | — | 134.5 mm |
| Ra(Max.) | — | — | 1.5 mm |
| Rb(Max.) | — | — | 1 mm |
| Mass(Refer.) | — | — | 2.52 kg |
Automatic matching is a search aid, not an interchangeability declaration. Confirm the full suffix, tolerances, internal design and application limits before substitution.