Technical data
Product specifications
Metric and imperial values are paired where the manufacturer provides both. Expand a section to review its parameters.
Core specifications17 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Series | 6311 | |
| Bore diameter | d | 55 mm |
| Outside diameter | D | 120 mm |
| Width | B | 29 mm |
| Basic dynamic load rating | C | 83 kN |
| Basic static load rating | C0 | 47.5 kN |
| Fatigue load limit | Pu | 3.3 kN |
| Reference speed | nref | 7800 r/min |
| Limiting speed | nG | 8500 r/min |
| Mass | ≈m | 1.33 kg |
| Precision class | P6 — Class 6 (ISO 492:2023) | |
| Internal clearance | C3 (Group 3) — Internal clearance larger than CN | |
| Sealing | Without — Not sealed | |
| Cage | JN — Steel sheet metal | |
| Lubricant | Without — Bearing not greased | |
| Minimum operating temperature | Tmin | -30 °C |
| Maximum operating temperature | Tmax | 150 °C |
Precision classification2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Radial ball bearing tolerance equivalent | ABEC 3Derived from ISO P6; not a direct ABEC marking | |
| Mapping basis | ISO 492 / ANSI/ABMA 20The original manufacturer tolerance remains the controlling value. |
Product characteristics9 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Changed internal design | C | GenerationC |
| Type of Seal | Without | Not sealed |
| Design, bearing outer ring | N | Ring groove for snap ring |
| Cage | JN | Steel sheet metal |
| Tolerance class | P6 | Class 6 (ISO 492:2023) |
| Dimensional / heat stabilization | S0 | Rings dimensional stabilized up to 150° |
| Lubricant | Without | Bearing not greased |
| Radial internal clearance | C3 (Group 3) | Internal clearance larger than CN |
| Bore type | Z | Cylindrical |
Main Dimensions & Performance Data9 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore diameter | d | 55 mm2.165 in |
| Outside diameter | D | 120 mm4.724 in |
| Width | B | 29 mm1.142 in |
| Basic dynamic load rating, radial | Cr | 83,000 N18,660.072 lbf |
| Basic static load rating, radial | C0r | 47,500 N10,678.957 lbf |
| Fatigue load limit, radial | Cur | 3,300 N741.906 lbf |
| Limiting speed | nG | 8,500 1/min |
| Reference speed | nϑr | 7,800 1/min |
| Mass | ≈m | 1.33 kg2.932 lbs |
Mounting dimensions3 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Minimum diameter shaft shoulder | da min | 66 mm2.598 in |
| Maximum diameter of housing shoulder | Da max | 109 mm4.291 in |
| Maximum fillet radius | ra max | 2 mm0.079 in |
Dimensions5 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Minimum chamfer dimension | rmin | 2 mm0.079 in |
| Shoulder diameter outer ring | D1 | 102.15 mm4.022 in |
| Caliber diameter outer ring | D2 | 105.3 mm4.146 in |
| Shoulder diameter inner ring | d1 | 74.7 mm2.941 in |
| Caliber diameter inner ring | d2 | 72.54 mm2.856 in |
Temperature range2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Operating temperature min. | Tmin | -30 °C-22 °F |
| Operating temperature max. | Tmax | 150 °C302 °F |
Calculation factors1 parameter
| Parameter | Symbol | Value |
|---|---|---|
| Calculation factor | f0 | 12.9 |
Capabilities & suitability6 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Radial load capacity | Yes | |
| Axial load capacity in one direction | Yes | |
| Axial load capacity in both directions | Yes | |
| Suitable for grease lubrication | Yes | |
| Suitable for oil lubrication | Yes | |
| Unsealed design | Yes |
Manufacturer Identity9 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Schaeffler Product Code | 355900 | |
| Brand | FAG | |
| Base Type | 6311 | |
| X Life Marking | C | |
| SAP material number | 0891352290030 | |
| Base product | 2305080101 | |
| Bearing X designation | 6311-C-N-C3 | |
| Mounting Manager ID | 6311-C-N-C3 | |
| Grease application ID | 6311-C-N-C3 |
Product Identity2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Construction | Deep groove ball bearing 63..-C-N, single row, Generation C, steel sheet metal cage, ring groove | |
| Short Description | Deep groove ball bearing |
Technical Data19 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore Diameter (D) | 55 mm | |
| Outside Diameter (D) | 120 mm | |
| Width (B) | 29 mm | |
| Basic Dynamic Load Rating, Radial (Cr) | 83,000 N | |
| Basic Static Load Rating, Radial (C0R) | 47,500 N | |
| Operating Temperature Min. (Tmin) | -30 °C | |
| Limiting Speed (Ng) | 8,500 1/min | |
| Operating Temperature Max. (Tmax) | 150 °C | |
| Reference Speed (Nϑr) | 7,800 1/min | |
| Calculation Factor (F0) | 12.9 | |
| Fatigue Load Limit, Radial (Cur) | 3,300 N | |
| Minimum Diameter Shaft Shoulder (Da Min) | 66 mm | |
| Shoulder Diameter Inner Ring (D1) | 74.7 mm | |
| Maximum Diameter Of Housing Shoulder (Da Max) | 109 mm | |
| Minimum Chamfer Dimension (Rmin) | 2 mm | |
| Caliber Diameter Inner Ring (D1) | 72.54 mm | |
| Maximum Fillet Radius (Ra Max) | 2 mm | |
| Shoulder Diameter Outer Ring (D1) | 102.15 mm | |
| Caliber Diameter Outer Ring (D1) | 105.3 mm |
