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
“51138” 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 | FAG51138-MP190 × 240 × 37 mm | NSK51138X190 × 240 × 37 mm | KOYO51138190 × 240 × 37 mm |
|---|---|---|---|
| Comparable specifications | |||
| Brand | FAG | NSK | KOYO |
| Designation | 51138-MP | 51138X | 51138 |
| 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 | 51138 | — | — |
| Bore diameterd | 190 mm | 190 mm | 190 mm |
| Outside diameterD | 240 mm | 240 mm | 240 mm |
| WidthB | 37 mm | 37 mm | 37 mm |
| Fatigue load limitPu | — | — | 20.2 kN |
| Reference speednref | 1850 r/min | — | — |
| Limiting speednG | 2040 r/min | — | 970 r/min |
| Mass≈m | 4.06 kg | 3.6 kg | 3.95 kg |
| Precision class | PN — Normal (ISO 492:2023) | — | — |
| Cage | MP — Solid brass cage, rolling element guided | — | — |
| Minimum operating temperatureTmin | -30 °C | — | — |
| Maximum operating temperatureTmax | 150 °C | — | — |
| Assembly boundary dimensions | |||
| Shaft-washer bore diameterd | — | 190 mm | — |
| Overall outside diameterD | — | 240 mm | — |
| Complete assembled heightT | — | 37 mm | — |
| Axial load ratings | |||
| Basic dynamic axial load ratingCa | — | 172000 N | — |
| Basic static axial load ratingC0a | — | 655000 N | — |
| Calculation factors | |||
| Minimum load factorA | 2.3 | — | — |
| Capabilities & suitability | |||
| Axial load capacity in one direction | Yes | — | — |
| Suitable for grease lubrication | Yes | — | — |
| Suitable for oil lubrication | Yes | — | — |
| Unsealed design | Yes | — | — |
| Chamfers | |||
| Minimum housing-side chamferr min. | — | 1.1 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 | — | 237 mm | — |
| Housing washer bore diameterD1 | — | 193 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 | 1.1 mm | — | — |
| Minimum chamfer dimensionrmin | 0.043 in | — | — |
| Inner diameter housing washerD1 | 193 mm | — | — |
| Inner diameter housing washerD1 | 7.598 in | — | — |
| Outer diameter shaft washerd1 | 237 mm | — | — |
| Outer diameter shaft washerd1 | 9.331 in | — | — |
| Lubrication-qualified speed | |||
| Limiting speed — grease | — | 1000 r/min | — |
| Limiting speed — oil | — | 1600 r/min | — |
| Main Dimensions & Performance Data | |||
| Inner diameter shaft washerd | 190 mm | — | — |
| Inner diameter shaft washerd | 7.48 in | — | — |
| Outer diameter housing washerD | 240 mm | — | — |
| Outer diameter housing washerD | 9.449 in | — | — |
| Basic dynamic load rating, axialCa | 161,000 N | — | — |
| Basic dynamic load rating, axialCa | 36,196.043 lbf | — | — |
| Basic static load rating, axialC0a | 650,000 N | — | — |
| Basic static load rating, axialC0a | 146,133.094 lbf | — | — |
| Fatigue load limit, axialCua | 20,200 N | — | — |
| Fatigue load limit, axialCua | 4,541.367 lbf | — | — |
| Manufacturer Identity | |||
| Schaeffler Product Code | 394482 | — | — |
| Official Class Key | — | — | 070-010-000 |
| Base Type | 51138 | — | — |
| Old Designation | ["51138MP"] | — | — |
| Gpsd Group | S02 | — | — |
| Product Line Id | 14 | — | — |
| X Life Marking | n.r. | — | — |
| SAP material number | 0190612690000 | — | — |
| Base product | 2305100101 | — | — |
| Bearing X designation | 51138-MP | — | — |
| Mounting Manager ID | 51138-MP | — | — |
| Grease application ID | 51138-MP | — | — |
| Mass reference | |||
| Approximate assembly mass | — | 3.6 kg | — |
| Mounting dimensions | |||
| Minimum shaft abutment diameterda min. | — | 220 mm | — |
| Maximum housing abutment diameterDa max. | — | 210 mm | — |
| Maximum housing-side fillet radiusra max. | — | 1 mm | — |
| Minimum diameter shaft shoulderda min | 220 mm | — | — |
| Minimum diameter shaft shoulderda min | 8.661 in | — | — |
| Maximum diameter of housing shoulderDa max | 210 mm | — | — |
| Maximum diameter of housing shoulderDa max | 8.268 in | — | — |
| Maximum filled radiusra max | 1 mm | — | — |
| Maximum filled radiusra max | 0.039 in | — | — |
| Product characteristics | |||
| Tolerance classPN | Normal (ISO 492:2023) | — | — |
| Dimensional / heat stabilizationS0 | Rings dimensional stabilized up to 150° | — | — |
| 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 | — | — | 240 mm |
| T | — | — | 37 mm |
| R(Min.) | — | — | 1.1 mm |
| Basic Load Ratings Ca | — | — | 213 kN |
| Bore Diameter (D) | 190 mm | — | — |
| Basic Load Ratings C0A | — | — | 655 kN |
| Outside Diameter (D) | 240 mm | — | — |
| Fatigue Load Limit : Cu | — | — | 20.2 kN |
| Width (B) | 37 mm | — | — |
| Limiting Speeds(Grease Lub.) | — | — | 970 min-1 |
| Basic Dynamic Load Rating, Axial (Ca) | 161,000 N | — | — |
| Limiting Speeds(Oil Lub.) | — | — | 1500 min-1 |
| Basic Static Load Rating, Axial (C0A) | 650,000 N | — | — |
| D1(Max.) | — | — | 237 mm |
| Operating Temperature Min. (Tmin) | -30 °C | — | — |
| D1(Min.) | — | — | 193 mm |
| Limiting Speed (Ng) | 2,040 1/min | — | — |
| D2 | — | — | - mm |
| Operating Temperature Max. (Tmax) | 150 °C | — | — |
| D3 | — | — | - mm |
| Reference Speed (Nϑr) | 1,850 1/min | — | — |
| A | — | — | - mm |
| Minimum Diameter Shaft Shoulder (Da Min) | 220 mm | — | — |
| R | — | — | - mm |
| Minimum Load Factor (A) | 2.3 | — | — |
| C | — | — | - mm |
| Rip Diameter Shaft Washer (D1) | 237 mm | — | — |
| Da(Min.) | — | — | 220 mm |
| Bore Diameter Housing Washer (D1) | 193 mm | — | — |
| Da(Max.) | — | — | 210 mm |
| Maximum Diameter Of Housing Shoulder (Da Max) | 210 mm | — | — |
| Ra(Max.) | — | — | 1 mm |
| Minimum Chamfer Dimension (Rmin) | 1.1 mm | — | — |
| Mass(Refer.) | — | — | 3.95 kg |
| Maximum Fillet Radius (Ra Max) | 1 mm | — | — |
| Fatigue Load Limit, Axial (Cua) | 20,200 N | — | — |
| Temperature range | |||
| Operating temperature min.Tmin | -30 °C | — | — |
| Operating temperature min.Tmin | -22 °F | — | — |
| Operating temperature max.Tmax | 150 °C | — | — |
| Operating temperature max.Tmax | 302 °F | — | — |
Automatic matching is a search aid, not an interchangeability declaration. Confirm the full suffix, tolerances, internal design and application limits before substitution.