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.
Automatic candidate selection
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
“684” 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 | FAG684>N4 × 9 × 2.5 mm | NSK684A4 × 9 × 2.5 mm | KOYO6844 × 9 × 2.5 mm |
|---|---|---|---|
| Comparable specifications | |||
| Brand | FAG | NSK | KOYO |
| Designation | 684>N | 684A | 684 |
| Product family | — | Single row deep groove ball bearings | Extra-small, miniature ball bearings / Standard type / Open |
| Detailed type | Deep groove ball bearings | Deep groove ball bearings | Deep groove ball bearings |
| Series | 684 | — | — |
| Bore diameterd | 4 mm | 4 mm | 4 mm |
| Outside diameterD | 9 mm | 9 mm | 9 mm |
| WidthB | 2.5 mm | 2.5 mm | 2.5 mm |
| Basic dynamic load ratingC | 0.68 kN | 0.705 kN | 0.8 kN |
| Basic static load ratingC0 | 0.228 kN | 0.225 kN | 0.23 kN |
| Fatigue load limitPu | 0.0141 kN | — | 0.006 kN |
| Reference speednref | 47000 r/min | — | — |
| Limiting speednG | 94000 r/min | — | 59000 r/min |
| Mass≈m | 0.00065 kg | 0.00063 kg | 0 kg |
| Precision class | PN — Normal (ISO 492:2023) | — | — |
| Internal clearance | CN (Group N) — Normal internal clearance | — | — |
| Sealing | Without — Not sealed | Open | Open |
| Cage | JN — Steel sheet metal | — | — |
| Lubricant | Without — Bearing not greased | — | — |
| Minimum operating temperatureTmin | -30 °C | — | — |
| Maximum operating temperatureTmax | 120 °C | — | — |
| Boundary dimensions | |||
| Bearing width (open)B | — | 2.5 mm | — |
| Minimum bearing chamferr min. | — | 0.15 mm | — |
| Calculation factors | |||
| Calculation factorf0 | 12.9 | — | — |
| Capabilities & suitability | |||
| Radial load capacity | Yes | — | — |
| Axial load capacity in one direction | Yes | — | — |
| Axial load capacity in both directions | Yes | — | — |
| Suitable for grease lubrication | Yes | — | — |
| Suitable for oil lubrication | Yes | — | — |
| Unsealed design | Yes | — | — |
| Classification | |||
| Official Category Path | — | — | Deep groove ball bearings - Extra-small, miniature ball bearings - Standard type - Open |
| Official Classification 1 | — | — | Deep groove ball bearings / Extra-small, miniature ball bearings / Standard type / Open |
| Construction | |||
| Catalogue closure construction | — | Open | — |
| Dimensions | |||
| Minimum chamfer dimensionrmin | 0.1 mm | — | — |
| Minimum chamfer dimensionrmin | 0.004 in | — | — |
| Shoulder diameter outer ringD1 | 7.7 mm | — | — |
| Shoulder diameter outer ringD1 | 0.303 in | — | — |
| Shoulder diameter inner ringd1 | 5.3 mm | — | — |
| Shoulder diameter inner ringd1 | 0.209 in | — | — |
| Load ratings | |||
| Basic dynamic radial load ratingCr | — | 705 N | — |
| Basic static radial load ratingC0r | — | 225 N | — |
| Lubrication-qualified speed | |||
| Limiting speed with grease | — | 53000 r/min | — |
| Limiting speed with oil (open) | — | 63000 r/min | — |
| Main Dimensions & Performance Data | |||
| Basic dynamic load rating, radialCr | 680 N | — | — |
| Basic dynamic load rating, radialCr | 152.878 lbf | — | — |
| Basic static load rating, radialC0r | 228 N | — | — |
| Basic static load rating, radialC0r | 51.259 lbf | — | — |
| Fatigue load limit, radialCur | 14.1 N | — | — |
| Fatigue load limit, radialCur | 3.17 lbf | — | — |
| Manufacturer Identity | |||
| Schaeffler Product Code | 2872724 | — | — |
| Official Class Key | — | — | 010-020-010 |
| Base Type | 684 | — | — |
| Gpsd Group | S02 | — | — |
| Product Line Id | 14 | — | — |
| SAP material number | 0976727850000 | — | — |
| Base product | 2305080101 | — | — |
| Mounting dimensions | |||
| Minimum shaft shoulder diameter (open)da min. | — | 4.8 mm | — |
| Maximum adjacent fillet radiusra max. | — | 0.1 mm | — |
| Maximum housing shoulder diameter (open)Da max. | — | 8.2 mm | — |
| Minimum diameter shaft shoulderda min | 4.6 mm | — | — |
| Minimum diameter shaft shoulderda min | 0.181 in | — | — |
| Maximum diameter of housing shoulderDa max | 8.4 mm | — | — |
| Maximum diameter of housing shoulderDa max | 0.331 in | — | — |
| Maximum fillet radiusra max | 0.1 mm | — | — |
| Maximum fillet radiusra max | 0.004 in | — | — |
| Product characteristics | |||
| Version code>N | Not marked on bearing | — | — |
| Type of SealWithout | Not sealed | — | — |
| Tolerance classPN | Normal (ISO 492:2023) | — | — |
| Dimensional / heat stabilizationSN | Rings dimensional stabilized up to 120° | — | — |
| Radial internal clearanceCN (Group N) | Normal internal clearance | — | — |
| Bore typeZ | Cylindrical | — | — |
| Product Identity | |||
| Construction | Deep groove ball bearing 68.., single row, steel sheet metal cage | — | — |
| Short Description | Deep groove ball bearing | — | — |
| Reference mass | |||
| Approximate catalogue mass (open) | — | 0.63 g | — |
| Technical Data | |||
| d | — | — | 9 mm |
| B | — | — | 2.5 mm |
| Bore Diameter (D) | 4 mm | — | — |
| R(Min.) | — | — | 0.15 mm |
| Outside Diameter (D) | 9 mm | — | — |
| Basic Load Ratings : Cr | — | — | 0.800 kN |
| Width (B) | 2.5 mm | — | — |
| Basic Load Ratings : C0R | — | — | 0.23 kN |
| Basic Dynamic Load Rating, Radial (Cr) | 680 N | — | — |
| Fatigue Load Limit : Cu | — | — | 0.006 kN |
| Basic Static Load Rating, Radial (C0R) | 228 N | — | — |
| Factor : F0 | — | — | 12.8 |
| Operating Temperature Min. (Tmin) | -30 °C | — | — |
| Limiting Speeds(Grease Lub.) | — | — | 59000 min-1 |
| Limiting Speed (Ng) | 94,000 1/min | — | — |
| Limiting Speeds(Oil Lub.) | — | — | 70000 min-1 |
| Operating Temperature Max. (Tmax) | 120 °C | — | — |
| Da(Min.) | — | — | 5.2 mm |
| Reference Speed (Nϑr) | 47,000 1/min | — | — |
| Da(Max.) | — | — | 7.8 mm |
| Calculation Factor (F0) | 12.9 | — | — |
| Ra(Max.) | — | — | 0.1 mm |
| Fatigue Load Limit, Radial (Cur) | 14.1 N | — | — |
| Mass(Refer.) | — | — | 0.6 g |
| Minimum Diameter Shaft Shoulder (Da Min) | 4.6 mm | — | — |
| Shoulder Diameter Inner Ring (D1) | 5.3 mm | — | — |
| Maximum Diameter Of Housing Shoulder (Da Max) | 8.4 mm | — | — |
| Minimum Chamfer Dimension (Rmin) | 0.1 mm | — | — |
| Maximum Fillet Radius (Ra Max) | 0.1 mm | — | — |
| Shoulder Diameter Outer Ring (D1) | 7.7 mm | — | — |
| Temperature range | |||
| Operating temperature min.Tmin | -30 °C | — | — |
| Operating temperature min.Tmin | -22 °F | — | — |
| Operating temperature max.Tmax | 120 °C | — | — |
| Operating temperature max.Tmax | 248 °F | — | — |
Automatic matching is a search aid, not an interchangeability declaration. Confirm the full suffix, tolerances, internal design and application limits before substitution.