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.
Cross Reference centre · Interchange verification checklist · Understand suffix differences
You entered 51230X. This table explores the base group 51230; it does not preserve or approve every requested suffix. Search your complete marking first →
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
“51230” 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 | FAG51230-MP150 × 215 × 50 mm | NSK51230X150 × 215 × 50 mm | KOYO51230150 × 215 × 50 mm |
|---|---|---|---|
| Comparable specifications | |||
| Brand | FAG | NSK | KOYO |
| Designation | 51230-MP | 51230X | 51230 |
| 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 | 51230 | — | — |
| Bore diameterd | 150 mm | 150 mm | 150 mm |
| Outside diameterD | 215 mm | 215 mm | 215 mm |
| WidthB | 50 mm | 50 mm | 50 mm |
| Fatigue load limitPu | — | — | 21.8 kN |
| Reference speednref | 2500 r/min | — | — |
| Limiting speednG | 1950 r/min | — | 840 r/min |
| Mass≈m | 5.943 kg | 5.52 kg | 5.64 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 | — | 150 mm | — |
| Overall outside diameterD | — | 215 mm | — |
| Complete assembled heightT | — | 50 mm | — |
| Axial load ratings | |||
| Basic dynamic axial load ratingCa | — | 238000 N | — |
| Basic static axial load ratingC0a | — | 735000 N | — |
| Calculation factors | |||
| Minimum load factorA | 2.9 | — | — |
| 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. | — | 1.5 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 | — | 212 mm | — |
| Housing washer bore diameterD1 | — | 153 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 | 1.5 mm | — | — |
| Minimum chamfer dimensionrmin | 0.059 in | — | — |
| Inner diameter housing washerD1 | 153 mm | — | — |
| Inner diameter housing washerD1 | 6.024 in | — | — |
| Outer diameter shaft washerd1 | 212 mm | — | — |
| Outer diameter shaft washerd1 | 8.346 in | — | — |
| Lubrication-qualified speed | |||
| Limiting speed — grease | — | 950 r/min | — |
| Limiting speed — oil | — | 1400 r/min | — |
| Main Dimensions & Performance Data | |||
| Inner diameter shaft washerd | 150 mm | — | — |
| Inner diameter shaft washerd | 5.906 in | — | — |
| Outer diameter housing washerD | 215 mm | — | — |
| Outer diameter housing washerD | 8.465 in | — | — |
| Basic dynamic load rating, axialCa | 236,000 N | — | — |
| Basic dynamic load rating, axialCa | 53,057.554 lbf | — | — |
| Basic static load rating, axialC0a | 730,000 N | — | — |
| Basic static load rating, axialC0a | 164,118.705 lbf | — | — |
| Fatigue load limit, axialCua | 24,900 N | — | — |
| Fatigue load limit, axialCua | 5,598.022 lbf | — | — |
| Manufacturer Identity | |||
| Schaeffler Product Code | 394578 | — | — |
| Official Class Key | — | — | 070-010-000 |
| Base Type | 51230 | — | — |
| Old Designation | ["51230MP"] | — | — |
| Gpsd Group | S02 | — | — |
| Product Line Id | 14 | — | — |
| X Life Marking | n.r. | — | — |
| SAP material number | 0167152250000 | — | — |
| Base product | 2305100101 | — | — |
| Bearing X designation | 51230-MP | — | — |
| Mounting Manager ID | 51230-MP | — | — |
| Grease application ID | 51230-MP | — | — |
| Mass reference | |||
| Approximate assembly mass | — | 5.52 kg | — |
| Mounting dimensions | |||
| Minimum shaft abutment diameterda min. | — | 189 mm | — |
| Maximum housing abutment diameterDa max. | — | 176 mm | — |
| Maximum housing-side fillet radiusra max. | — | 1.5 mm | — |
| Minimum diameter shaft shoulderda min | 189 mm | — | — |
| Minimum diameter shaft shoulderda min | 7.441 in | — | — |
| Maximum diameter of housing shoulderDa max | 176 mm | — | — |
| Maximum diameter of housing shoulderDa max | 6.929 in | — | — |
| Maximum filled radiusra max | 1.5 mm | — | — |
| Maximum filled radiusra max | 0.059 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 512..-MP, single direction, solid brass cage | — | — |
| Short Description | Axial deep groove ball bearing | — | — |
| Technical Data | |||
| d | — | — | 215 mm |
| T | — | — | 50 mm |
| R(Min.) | — | — | 1.5 mm |
| Basic Load Ratings Ca | — | — | 266 kN |
| Bore Diameter (D) | 150 mm | — | — |
| Basic Load Ratings C0A | — | — | 652 kN |
| Outside Diameter (D) | 215 mm | — | — |
| Fatigue Load Limit : Cu | — | — | 21.8 kN |
| Width (B) | 50 mm | — | — |
| Limiting Speeds(Grease Lub.) | — | — | 840 min-1 |
| Basic Dynamic Load Rating, Axial (Ca) | 236,000 N | — | — |
| Limiting Speeds(Oil Lub.) | — | — | 1300 min-1 |
| Basic Static Load Rating, Axial (C0A) | 730,000 N | — | — |
| D1(Max.) | — | — | 212 mm |
| Operating Temperature Min. (Tmin) | -30 °C | — | — |
| D1(Min.) | — | — | 153 mm |
| Limiting Speed (Ng) | 1,950 1/min | — | — |
| D2 | — | — | - mm |
| Operating Temperature Max. (Tmax) | 150 °C | — | — |
| D3 | — | — | - mm |
| Reference Speed (Nϑr) | 2,500 1/min | — | — |
| A | — | — | - mm |
| Minimum Diameter Shaft Shoulder (Da Min) | 189 mm | — | — |
| R | — | — | - mm |
| Minimum Load Factor (A) | 2.9 | — | — |
| C | — | — | - mm |
| Rip Diameter Shaft Washer (D1) | 212 mm | — | — |
| Da(Min.) | — | — | 189 mm |
| Bore Diameter Housing Washer (D1) | 153 mm | — | — |
| Da(Max.) | — | — | 176 mm |
| Maximum Diameter Of Housing Shoulder (Da Max) | 176 mm | — | — |
| Ra(Max.) | — | — | 1.5 mm |
| Minimum Chamfer Dimension (Rmin) | 1.5 mm | — | — |
| Mass(Refer.) | — | — | 5.64 kg |
| Maximum Fillet Radius (Ra Max) | 1.5 mm | — | — |
| Fatigue Load Limit, Axial (Cua) | 24,900 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.