Technical data
Product specifications
Metric and imperial values are paired where the manufacturer provides both. Expand a section to review its parameters.
Core specifications11 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Series | 51256 | |
| Bore diameter | d | 280 mm |
| Outside diameter | D | 380 mm |
| Width | B | 80 mm |
| Reference speed | nref | 1250 r/min |
| Limiting speed | nG | 1100 r/min |
| Mass | ≈m | 26 kg |
| Precision class | PN — Normal (ISO 492:2023) | |
| Cage | MP — Solid brass cage, rolling element guided | |
| Minimum operating temperature | Tmin | -30 °C |
| Maximum operating temperature | Tmax | 200 °C |
Product characteristics3 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Cage | MP | Solid brass cage, rolling element guided |
| Tolerance class | PN | Normal (ISO 492:2023) |
| Dimensional / heat stabilization | S1 | Rings dimensional stabilized up to 200° |
Main Dimensions & Performance Data9 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Inner diameter shaft washer | d | 280 mm11.024 in |
| Outer diameter housing washer | D | 380 mm14.961 in |
| Height | T | 80 mm3.15 in |
| Basic dynamic load rating, axial | Ca | 495,000 N111,285.971 lbf |
| Basic static load rating, axial | C0a | 2,150,000 N483,363.309 lbf |
| Fatigue load limit, axial | Cua | 54,000 N12,140.288 lbf |
| Limiting speed | nG | 1,100 1/min |
| Reference speed | nϑr | 1,250 1/min |
| Mass | ≈m | 26 kg57.32 lbs |
Mounting dimensions3 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Minimum diameter shaft shoulder | da min | 340 mm13.386 in |
| Maximum diameter of housing shoulder | Da max | 320 mm12.598 in |
| Maximum filled radius | ra max | 2.1 mm0.083 in |
Dimensions3 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Minimum chamfer dimension | rmin | 2.1 mm0.083 in |
| Inner diameter housing washer | D1 | 284 mm11.181 in |
| Outer diameter shaft washer | d1 | 375 mm14.764 in |
Temperature range2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Operating temperature min. | Tmin | -30 °C-22 °F |
| Operating temperature max. | Tmax | 200 °C392 °F |
Calculation factors1 parameter
| Parameter | Symbol | Value |
|---|---|---|
| Minimum load factor | A | 24 |
Capabilities & suitability5 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Axial load capacity in one direction | Yes | |
| Suitable for grease lubrication | Yes | |
| Suitable for oil lubrication | Yes | |
| Unsealed design | Yes | |
| Largebearing | Yes |
Manufacturer Identity10 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Schaeffler Product Code | 394597 | |
| Brand | FAG | |
| Base Type | 51256 | |
| Old Designation | ["51256M","51256MP"] | |
| X Life Marking | n.r. | |
| SAP material number | 0190624510000 | |
| Base product | 2305100101 | |
| Bearing X designation | 51256-MP | |
| Mounting Manager ID | 51256-MP | |
| Grease application ID | 51256-MP |
Product Identity2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Construction | Axial deep groove ball bearing 512..-MP, single direction, solid brass cage | |
| Short Description | Axial deep groove ball bearing |
Technical Data17 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore Diameter (D) | 280 mm | |
| Outside Diameter (D) | 380 mm | |
| Width (B) | 80 mm | |
| Basic Dynamic Load Rating, Axial (Ca) | 495,000 N | |
| Basic Static Load Rating, Axial (C0A) | 2,150,000 N | |
| Operating Temperature Min. (Tmin) | -30 °C | |
| Limiting Speed (Ng) | 1,100 1/min | |
| Operating Temperature Max. (Tmax) | 200 °C | |
| Reference Speed (Nϑr) | 1,250 1/min | |
| Minimum Diameter Shaft Shoulder (Da Min) | 340 mm | |
| Minimum Load Factor (A) | 24 | |
| Rip Diameter Shaft Washer (D1) | 375 mm | |
| Bore Diameter Housing Washer (D1) | 284 mm | |
| Maximum Diameter Of Housing Shoulder (Da Max) | 320 mm | |
| Minimum Chamfer Dimension (Rmin) | 2.1 mm | |
| Maximum Fillet Radius (Ra Max) | 2.1 mm | |
| Fatigue Load Limit, Axial (Cua) | 54,000 N |