Cross-brand designation analysis
COMPARE / VERIFY
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
“51168” 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 | FAG51168-MP340 × 420 × 64 mm | NSK51168X340 × 420 × 64 mm | KOYO51168340 × 420 × 64 mm |
|---|---|---|---|
| Comparable specifications | |||
| Brand | FAG | NSK | KOYO |
| Designation | 51168-MP | 51168X | 51168 |
| Product family | — | Axial deep groove ball bearing | Single direction / With flat back faces |
| Detailed type | Axial deep groove ball bearings | Axial deep groove ball bearings | Axial deep groove ball bearings |
| Series | 51168 | — | — |
| Bore diameterd | 340 mm | 340 mm | 340 mm |
| Outside diameterD | 420 mm | 420 mm | 420 mm |
| WidthB | 64 mm | 64 mm | 64 mm |
| Fatigue load limitPu | — | — | 43.1 kN |
| Reference speednref | 1020 r/min | — | — |
| Limiting speednG | 1160 r/min | — | 500 r/min |
| Mass≈m | 19.9 kg | 19.9 kg | 20.5 kg |
| Precision class | PN — Normal (ISO 492:2023) | — | — |
| Cage | MP — Solid brass cage, rolling element guided | — | — |
| Minimum operating temperatureTmin | -30 °C | — | — |
| Maximum operating temperatureTmax | 200 °C | — | — |
| Assembly boundary dimensions | |||
| Shaft-washer bore diameterd | — | 340 mm | — |
| Overall outside diameterD | — | 420 mm | — |
| Complete assembled heightT | — | 64 mm | — |
| Axial load ratings | |||
| Basic dynamic axial load ratingCa | — | 375000 N | — |
| Basic static axial load ratingC0a | — | 1760000 N | — |
| Calculation factors | |||
| Minimum load factorA | 18 | — | — |
| Capabilities & suitability | |||
| Axial load capacity in one direction | Yes | — | — |
| Suitable for grease lubrication | Yes | — | — |
| Suitable for oil lubrication | Yes | — | — |
| Unsealed design | Yes | — | — |
| Largebearing | Yes | — | — |
| Chamfers | |||
| Minimum housing-side chamferr min. | — | 2 mm | — |
| Classification | |||
| Official Category Path | — | — | Thrust ball bearings - Single direction - With flat back faces |
| Official Classification 1 | — | — | Thrust ball bearings / Single direction / With flat back faces |
| Component dimensions | |||
| Shaft washer outside diameterd1 | — | 416 mm | — |
| Housing washer bore diameterD1 | — | 344 mm | — |
| Construction | |||
| Axial load directions | — | One direction | — |
| Seat construction | — | Flat seat | — |
| Radial-load support | — | Not suitable for radial load; separate radial support required | — |
| Dimensions | |||
| Minimum chamfer dimensionrmin | 2 mm | — | — |
| Minimum chamfer dimensionrmin | 0.079 in | — | — |
| Inner diameter housing washerD1 | 344 mm | — | — |
| Inner diameter housing washerD1 | 13.543 in | — | — |
| Outer diameter shaft washerd1 | 416 mm | — | — |
| Outer diameter shaft washerd1 | 16.378 in | — | — |
| Lubrication-qualified speed | |||
| Limiting speed — grease | — | 560 r/min | — |
| Limiting speed — oil | — | 850 r/min | — |
| Main Dimensions & Performance Data | |||
| Inner diameter shaft washerd | 340 mm | — | — |
| Inner diameter shaft washerd | 13.386 in | — | — |
| Outer diameter housing washerD | 420 mm | — | — |
| Outer diameter housing washerD | 16.535 in | — | — |
| Basic dynamic load rating, axialCa | 380,000 N | — | — |
| Basic dynamic load rating, axialCa | 85,431.655 lbf | — | — |
| Basic static load rating, axialC0a | 1,810,000 N | — | — |
| Basic static load rating, axialC0a | 406,924.46 lbf | — | — |
| Fatigue load limit, axialCua | 51,000 N | — | — |
| Fatigue load limit, axialCua | 11,465.827 lbf | — | — |
| Manufacturer Identity | |||
| Schaeffler Product Code | 394498 | — | — |
| Official Class Key | — | — | 070-010-000 |
| Base Type | 51168 | — | — |
| Old Designation | ["51168MP"] | — | — |
| Gpsd Group | S02 | — | — |
| Product Line Id | 14 | — | — |
| SAP material number | 0190615950000 | — | — |
| Base product | 2305100101 | — | — |
| Bearing X designation | 51168-MP | — | — |
| Mounting Manager ID | 51168-MP | — | — |
| Grease application ID | 51168-MP | — | — |
| Mass reference | |||
| Approximate assembly mass | — | 19.9 kg | — |
| Mounting dimensions | |||
| Minimum shaft abutment diameterda min. | — | 388 mm | — |
| Maximum housing abutment diameterDa max. | — | 372 mm | — |
| Maximum housing-side fillet radiusra max. | — | 2 mm | — |
| Minimum diameter shaft shoulderda min | 388 mm | — | — |
| Minimum diameter shaft shoulderda min | 15.276 in | — | — |
| Maximum diameter of housing shoulderDa max | 372 mm | — | — |
| Maximum diameter of housing shoulderDa max | 14.646 in | — | — |
| Maximum filled radiusra max | 2 mm | — | — |
| Maximum filled radiusra max | 0.079 in | — | — |
| Product characteristics | |||
| Tolerance classPN | Normal (ISO 492:2023) | — | — |
| Dimensional / heat stabilizationS1 | Rings dimensional stabilized up to 200° | — | — |
| Product Identity | |||
| Construction | Axial deep groove ball bearing 511..-MP, single direction, solid brass cage | — | — |
| Short Description | Axial deep groove ball bearing | — | — |
| Technical Data | |||
| d | — | — | 420 mm |
| T | — | — | 64 mm |
| R(Min.) | — | — | 2 mm |
| Bore Diameter (D) | 340 mm | — | — |
| Basic Load Ratings Ca | — | — | 483 kN |
| Outside Diameter (D) | 420 mm | — | — |
| Basic Load Ratings C0A | — | — | 1860 kN |
| Width (B) | 64 mm | — | — |
| Fatigue Load Limit : Cu | — | — | 43.1 kN |
| Basic Dynamic Load Rating, Axial (Ca) | 380,000 N | — | — |
| Limiting Speeds(Grease Lub.) | — | — | 500 min-1 |
| Basic Static Load Rating, Axial (C0A) | 1,810,000 N | — | — |
| Limiting Speeds(Oil Lub.) | — | — | 770 min-1 |
| Operating Temperature Min. (Tmin) | -30 °C | — | — |
| D1(Max.) | — | — | 416 mm |
| Limiting Speed (Ng) | 1,160 1/min | — | — |
| D1(Min.) | — | — | 344 mm |
| Operating Temperature Max. (Tmax) | 200 °C | — | — |
| D2 | — | — | - mm |
| Reference Speed (Nϑr) | 1,020 1/min | — | — |
| D3 | — | — | - mm |
| Minimum Diameter Shaft Shoulder (Da Min) | 388 mm | — | — |
| A | — | — | - mm |
| Minimum Load Factor (A) | 18 | — | — |
| R | — | — | - mm |
| Rip Diameter Shaft Washer (D1) | 416 mm | — | — |
| C | — | — | - mm |
| Bore Diameter Housing Washer (D1) | 344 mm | — | — |
| Da(Min.) | — | — | 388 mm |
| Maximum Diameter Of Housing Shoulder (Da Max) | 372 mm | — | — |
| Da(Max.) | — | — | 372 mm |
| Minimum Chamfer Dimension (Rmin) | 2 mm | — | — |
| Ra(Max.) | — | — | 2 mm |
| Maximum Fillet Radius (Ra Max) | 2 mm | — | — |
| Mass(Refer.) | — | — | 20.5 kg |
| Fatigue Load Limit, Axial (Cua) | 51,000 N | — | — |
| Temperature range | |||
| Operating temperature min.Tmin | -30 °C | — | — |
| Operating temperature min.Tmin | -22 °F | — | — |
| Operating temperature max.Tmax | 200 °C | — | — |
| Operating temperature max.Tmax | 392 °F | — | — |
Automatic matching is a search aid, not an interchangeability declaration. Confirm the full suffix, tolerances, internal design and application limits before substitution.