Technical data
Product specifications
Metric and imperial values are paired where the manufacturer provides both. Expand a section to review its parameters.
Core specifications16 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Series | 71856 | |
| Bore diameter | d | 280 mm |
| Outside diameter | D | 350 mm |
| Width | B | 33 mm |
| Basic dynamic load rating | C | 162 kN |
| Basic static load rating | C0 | 250 kN |
| Fatigue load limit | Pu | 8.3 kN |
| Reference speed | nref | 1550 r/min |
| Limiting speed | nG | 2650 r/min |
| Mass | ≈m | 6.86 kg |
| Precision class | PN — Normal (ISO 492:2023) | |
| Sealing | Without — Not sealed | |
| Cage | MP — Solid brass cage, ball guided | |
| Lubricant | Without — Bearing not greased | |
| Minimum operating temperature | Tmin | -30 °C |
| Maximum operating temperature | Tmax | 200 °C |
Precision classification2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Radial ball bearing tolerance equivalent | ABEC 1Derived from ISO Normal; not a direct ABEC marking | |
| Mapping basis | ISO 492 / ANSI/ABMA 20The original manufacturer tolerance remains the controlling value. |
Product characteristics5 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Type of Seal | Without | Not sealed |
| Cage | MP | Solid brass cage, ball guided |
| Tolerance class | PN | Normal (ISO 492:2023) |
| Dimensional / heat stabilization | S1 | Rings dimensional stabilized up to 200° |
| Lubricant | Without | Bearing not greased |
Main Dimensions & Performance Data9 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore diameter | d | 280 mm11.024 in |
| Outside diameter | D | 350 mm13.78 in |
| Width | B | 33 mm1.299 in |
| Basic dynamic load rating, radial | Cr | 162,000 N36,420.863 lbf |
| Basic static load rating, radial | C0r | 250,000 N56,205.036 lbf |
| Fatigue load limit, radial | Cur | 8,300 N1,866.007 lbf |
| Limiting speed | nG | 2,650 1/min |
| Reference speed | nϑr | 1,550 1/min |
| Mass | ≈m | 6.86 kg15.124 lbs |
Mounting dimensions5 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Minimum diameter of shaft shoulder | da min | 288.8 mm11.37 in |
| Maximum diameter of housing shoulder | Da max | 341.2 mm13.433 in |
| Maximum diameter of housing shoulder | Db max | 345.4 mm13.598 in |
| Maximum fillet radius of shaft | ra max | 2 mm0.079 in |
| Maximum fillet radius of housing | ra1 max | 1 mm0.039 in |
Dimensions6 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Minimum chamfer dimension | rmin | 2 mm0.079 in |
| Minimum chamfer dimension | r1 min | 1 mm0.039 in |
| Shoulder diameter on outer ring wide side face | D1 | 323.9 mm12.752 in |
| Shoulder diameter on inner ring wide side face | d1 | 307.6 mm12.11 in |
| Distance between the apexes of the pressure cones | a | 107.4 mm4.228 in |
| Contact angle | α | 30 ° |
Temperature range2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Operating temperature min. | Tmin | -30 °C-22 °F |
| Operating temperature max. | Tmax | 200 °C392 °F |
Capabilities & suitability6 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Radial load capacity | Yes | |
| Axial load capacity in one direction | Yes | |
| Suitable for grease lubrication | Yes | |
| Suitable for oil lubrication | Yes | |
| Unsealed design | Yes | |
| Largebearing | Yes |
Manufacturer Identity8 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Schaeffler Product Code | 2506037 | |
| Brand | FAG | |
| Base Type | 71856 | |
| SAP material number | 0392675980000 | |
| Base product | 2305080301 | |
| Bearing X designation | 71856-MP | |
| Mounting Manager ID | 71856-MP | |
| Grease application ID | 71856-MP |
Product Identity2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Construction | Angular contact ball bearing 718..-MP, single row, solid brass cage | |
| Short Description | Angular contact ball bearing |
Technical Data21 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore Diameter (D) | 280 mm | |
| Outside Diameter (D) | 350 mm | |
| Width (B) | 33 mm | |
| Basic Dynamic Load Rating, Radial (Cr) | 162,000 N | |
| Basic Static Load Rating, Radial (C0R) | 250,000 N | |
| Operating Temperature Min. (Tmin) | -30 °C | |
| Limiting Speed (Ng) | 2,650 1/min | |
| Operating Temperature Max. (Tmax) | 200 °C | |
| Reference Speed (Nϑr) | 1,550 1/min | |
| Maximum Diameter Of Housing Shoulder (Db Max) | 345.4 mm | |
| Fatigue Load Limit, Radial (Cur) | 8,300 N | |
| Minimum Diameter Shaft Shoulder (Da Min) | 288.8 mm | |
| Shoulder Diameter Inner Ring (D1) | 307.6 mm | |
| Maximum Diameter Of Housing Shoulder (Da Max) | 341.2 mm | |
| Minimum Chamfer Dimension (Rmin) | 2 mm | |
| Maximum Fillet Radius (Ra Max) | 2 mm | |
| Maximum Recess Radius (Ra1 Max) | 1 mm | |
| Shoulder Diameter Outer Ring (D1) | 323.9 mm | |
| Minimum Chamfer Dimension (R1 Min) | 1 mm | |
| Contact Angle (Α) | 30 ° | |
| Distance Between The Apexes Of The Pressure Cones (A) | 107.4 mm |