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
“51248” 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 | FAG51248-MP240 × 340 × 78 mm | NSK51248X240 × 340 × 78 mm | KOYO51248240 × 340 × 78 mm |
|---|---|---|---|
| Comparable specifications | |||
| Brand | FAG | NSK | KOYO |
| Designation | 51248-MP | 51248X | 51248 |
| 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 | 51248 | — | — |
| Bore diameterd | 240 mm | 240 mm | 240 mm |
| Outside diameterD | 340 mm | 340 mm | 340 mm |
| WidthB | 78 mm | 78 mm | 78 mm |
| Fatigue load limitPu | — | — | 47.8 kN |
| Reference speednref | 1510 r/min | — | — |
| Limiting speednG | 1200 r/min | — | 520 r/min |
| Mass≈m | 22.7 kg | 23.7 kg | 23.1 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 | — | 240 mm | — |
| Overall outside diameterD | — | 340 mm | — |
| Complete assembled heightT | — | 78 mm | — |
| Axial load ratings | |||
| Basic dynamic axial load ratingCa | — | 420000 N | — |
| Basic static axial load ratingC0a | — | 1650000 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. | — | 2.1 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 | — | 335 mm | — |
| Housing washer bore diameterD1 | — | 244 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 | 2.1 mm | — | — |
| Minimum chamfer dimensionrmin | 0.083 in | — | — |
| Inner diameter housing washerD1 | 244 mm | — | — |
| Inner diameter housing washerD1 | 9.606 in | — | — |
| Outer diameter shaft washerd1 | 335 mm | — | — |
| Outer diameter shaft washerd1 | 13.189 in | — | — |
| Lubrication-qualified speed | |||
| Limiting speed — grease | — | 560 r/min | — |
| Limiting speed — oil | — | 850 r/min | — |
| Main Dimensions & Performance Data | |||
| Inner diameter shaft washerd | 240 mm | — | — |
| Inner diameter shaft washerd | 9.449 in | — | — |
| Outer diameter housing washerD | 340 mm | — | — |
| Outer diameter housing washerD | 13.386 in | — | — |
| Basic dynamic load rating, axialCa | 435,000 N | — | — |
| Basic dynamic load rating, axialCa | 97,796.763 lbf | — | — |
| Basic static load rating, axialC0a | 1,840,000 N | — | — |
| Basic static load rating, axialC0a | 413,669.065 lbf | — | — |
| Fatigue load limit, axialCua | 49,000 N | — | — |
| Fatigue load limit, axialCua | 11,016.187 lbf | — | — |
| Manufacturer Identity | |||
| Schaeffler Product Code | 394593 | — | — |
| Official Class Key | — | — | 070-010-000 |
| Base Type | 51248 | — | — |
| Old Designation | ["51248MP","51248M"] | — | — |
| Gpsd Group | S02 | — | — |
| Product Line Id | 14 | — | — |
| X Life Marking | n.r. | — | — |
| SAP material number | 0190623200000 | — | — |
| Base product | 2305100101 | — | — |
| Bearing X designation | 51248-MP | — | — |
| Mounting Manager ID | 51248-MP | — | — |
| Grease application ID | 51248-MP | — | — |
| Mass reference | |||
| Approximate assembly mass | — | 23.7 kg | — |
| Mounting dimensions | |||
| Minimum shaft abutment diameterda min. | — | 299 mm | — |
| Maximum housing abutment diameterDa max. | — | 281 mm | — |
| Maximum housing-side fillet radiusra max. | — | 2 mm | — |
| Minimum diameter shaft shoulderda min | 300 mm | — | — |
| Minimum diameter shaft shoulderda min | 11.811 in | — | — |
| Maximum diameter of housing shoulderDa max | 280 mm | — | — |
| Maximum diameter of housing shoulderDa max | 11.024 in | — | — |
| Maximum filled radiusra max | 2.1 mm | — | — |
| Maximum filled radiusra max | 0.083 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 512..-MP, single direction, solid brass cage | — | — |
| Short Description | Axial deep groove ball bearing | — | — |
| Technical Data | |||
| d | — | — | 340 mm |
| T | — | — | 78 mm |
| R(Min.) | — | — | 2.1 mm |
| Basic Load Ratings Ca | — | — | 553 kN |
| Bore Diameter (D) | 240 mm | — | — |
| Basic Load Ratings C0A | — | — | 1800 kN |
| Outside Diameter (D) | 340 mm | — | — |
| Fatigue Load Limit : Cu | — | — | 47.8 kN |
| Width (B) | 78 mm | — | — |
| Limiting Speeds(Grease Lub.) | — | — | 520 min-1 |
| Basic Dynamic Load Rating, Axial (Ca) | 435,000 N | — | — |
| Limiting Speeds(Oil Lub.) | — | — | 800 min-1 |
| Basic Static Load Rating, Axial (C0A) | 1,840,000 N | — | — |
| D1(Max.) | — | — | 335 mm |
| Operating Temperature Min. (Tmin) | -30 °C | — | — |
| D1(Min.) | — | — | 244 mm |
| Limiting Speed (Ng) | 1,200 1/min | — | — |
| D2 | — | — | - mm |
| Operating Temperature Max. (Tmax) | 200 °C | — | — |
| D3 | — | — | - mm |
| Reference Speed (Nϑr) | 1,510 1/min | — | — |
| A | — | — | - mm |
| Minimum Diameter Shaft Shoulder (Da Min) | 300 mm | — | — |
| R | — | — | - mm |
| Minimum Load Factor (A) | 18 | — | — |
| C | — | — | - mm |
| Rip Diameter Shaft Washer (D1) | 335 mm | — | — |
| Da(Min.) | — | — | 299 mm |
| Bore Diameter Housing Washer (D1) | 244 mm | — | — |
| Da(Max.) | — | — | 281 mm |
| Maximum Diameter Of Housing Shoulder (Da Max) | 280 mm | — | — |
| Ra(Max.) | — | — | 2 mm |
| Minimum Chamfer Dimension (Rmin) | 2.1 mm | — | — |
| Mass(Refer.) | — | — | 23.1 kg |
| Maximum Fillet Radius (Ra Max) | 2.1 mm | — | — |
| Fatigue Load Limit, Axial (Cua) | 49,000 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.