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 | 66.91 kN |
| Basic static load rating | C0 | 41.89 kN |
| Fatigue load limit | Pu | 2.55 kN |
| Reference speed | nref | 7200 r/min |
| Limiting speed | nG | 7900 r/min |
| Mass | ≈m | 1.4 kg |
| Precision class | PN — Normal (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 | 120 °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 characteristics9 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Version code | >N | Not marked on bearing |
| Changed internal design | H | Design variant H (H-Series) |
| Type of Seal | Without | Not sealed |
| Cage | JN | Steel sheet metal |
| Tolerance class | PN | Normal (ISO 492:2023) |
| Dimensional / heat stabilization | SN | Rings dimensional stabilized up to 120° |
| 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 | 66,910 N15,042.716 lbf |
| Basic static load rating, radial | C0r | 41,890 N9,417.716 lbf |
| Fatigue load limit, radial | Cur | 2,550 N573.291 lbf |
| Limiting speed | nG | 7,900 1/min |
| Reference speed | nϑr | 7,200 1/min |
| Mass | ≈m | 1.4 kg3.086 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 |
Dimensions3 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Minimum chamfer dimension | rmin | 2 mm0.079 in |
| Shoulder diameter outer ring | D1 | 100.9 mm3.972 in |
| Shoulder diameter inner ring | d1 | 76.1 mm2.996 in |
Temperature range2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Operating temperature min. | Tmin | -30 °C-22 °F |
| Operating temperature max. | Tmax | 120 °C248 °F |
Calculation factors1 parameter
| Parameter | Symbol | Value |
|---|---|---|
| Calculation factor | f0 | 13.3 |
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 Identity5 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Schaeffler Product Code | 2633338 | |
| Brand | FAG | |
| Base Type | 6311 | |
| SAP material number | 3003963410030 | |
| Base product | 2305080101 |
Product Identity2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Construction | Deep groove ball bearing 63..-H, single row, H-Series, steel sheet metal cage | |
| Short Description | Deep groove ball bearing |
Technical Data17 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore Diameter (D) | 55 mm | |
| Outside Diameter (D) | 120 mm | |
| Width (B) | 29 mm | |
| Basic Dynamic Load Rating, Radial (Cr) | 66,910 N | |
| Basic Static Load Rating, Radial (C0R) | 41,890 N | |
| Operating Temperature Min. (Tmin) | -30 °C | |
| Limiting Speed (Ng) | 7,900 1/min | |
| Operating Temperature Max. (Tmax) | 120 °C | |
| Reference Speed (Nϑr) | 7,200 1/min | |
| Calculation Factor (F0) | 13.3 | |
| Fatigue Load Limit, Radial (Cur) | 2,550 N | |
| Minimum Diameter Shaft Shoulder (Da Min) | 66 mm | |
| Shoulder Diameter Inner Ring (D1) | 76.1 mm | |
| Maximum Diameter Of Housing Shoulder (Da Max) | 109 mm | |
| Minimum Chamfer Dimension (Rmin) | 2 mm | |
| Maximum Fillet Radius (Ra Max) | 2 mm | |
| Shoulder Diameter Outer Ring (D1) | 100.9 mm |
