Technical data
Product specifications
Metric and imperial values are paired where the manufacturer provides both. Expand a section to review its parameters.
Core specifications14 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Series | 21304 | |
| Bore diameter | d | 20 mm |
| Outside diameter | D | 52 mm |
| Width | B | 15 mm |
| Basic dynamic load rating | C | 41 kN |
| Basic static load rating | C0 | 33 kN |
| Fatigue load limit | Pu | 3.8 kN |
| Reference speed | nref | 9700 r/min |
| Limiting speed | nG | 16000 r/min |
| Mass | ≈m | 0.158 kg |
| Internal clearance | C3 (Group 3) — Internal clearance larger than CN | |
| Cage | TVPB — Plastic cage | |
| Minimum operating temperature | Tmin | -30 °C |
| Maximum operating temperature | Tmax | 120 °C |
Product characteristics2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Cage | TVPB | Plastic cage |
| Radial internal clearance | C3 (Group 3) | Internal clearance larger than CN |
Main Dimensions & Performance Data9 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore diameter | d | 20 mm0.787 in |
| Outside diameter | D | 52 mm2.047 in |
| Width | B | 15 mm0.591 in |
| Basic dynamic load rating, radial | Cr | 41,000 N9,217.626 lbf |
| Basic static load rating, radial | C0r | 33,000 N7,419.065 lbf |
| Fatigue load limit, radial | Cur | 3,800 N854.317 lbf |
| Limiting speed | nG | 16,000 1/min |
| Reference speed | nϑr | 9,700 1/min |
| Mass | ≈m | 0.158 kg0.348 lbs |
Mounting dimensions3 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Minimum diameter shaft shoulder | da min | 27 mm1.063 in |
| Maximum diameter of housing shoulder | Da max | 45 mm1.772 in |
| Maximum recess radius | ra max | 1 mm0.039 in |
Dimensions3 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Minimum chamfer dimension | rmin | 1.1 mm0.043 in |
| Bore diameter outer ring | D1 | 43 mm1.693 in |
| Raceway diameter of the inner ring | d2 | 28.9 mm1.138 in |
Temperature range2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Operating temperature min. | Tmin | -30 °C-22 °F |
| Operating temperature max. | Tmax | 120 °C248 °F |
Calculation factors4 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Limiting value of Fa/Fr for the applicability of diff. Values of factors X and Y | e | 0.3 |
| Dynamic axial load factor | Y1 | 2.25 |
| Dynamic axial load factor | Y2 | 3.34 |
| Static axial load factor | Y0 | 2.2 |
Manufacturer Identity7 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Schaeffler Product Code | 386652 | |
| Brand | FAG | |
| Base Type | 21304 | |
| Old Designation | ["21304-E1-TVPB-C3","21304E1TVPB.C3"] | |
| X Life Marking | XL | |
| SAP material number | 0167022040030 | |
| Base product | 2305091101 |
Product Identity1 parameter
| Parameter | Symbol | Value |
|---|---|---|
| Short Description | Spherical Roller Bearing |
Technical Data20 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore Diameter (D) | 20 mm | |
| Outside Diamater (D) | 52 mm | |
| Total Width (B) | 15 mm | |
| Basic Dynamic Load Rating, Radial (Cr) | 41,000 N | |
| Basic Static Load Rating, Radial (C0R) | 33,000 N | |
| Operating Temperature Min. (Tmin) | -30 °C | |
| Minimum Diameter Shaft Shoulder (Da) | 27 mm | |
| Operating Temperature Max. (Tmax) | 120 °C | |
| Limiting Speed (Limiting Spe) | 16,000 1/min | |
| Reference Speed (Nϑr) | 9,700 1/min | |
| Maximum Recess Radius (Ra Max) | 1 mm | |
| Maximum Diameter Of Housing Shoulder (Da) | 45 mm | |
| Limiting Value Of Fa/Fr For The Applicability Of Diff. Values Of Factors X And Y (E) | 0.3 | |
| Dynamic Axial Load Factor (Y1) | 2.25 | |
| Bore Diameter Outer Ring (D1) | 43 mm | |
| Raceway Diameter Of The Inner Ring (D2) | 28.9 mm | |
| Minimum Chamfer Dimension (Rmin) | 1.1 mm | |
| Static Axial Load Factor (Y0) | 2.2 | |
| Dynamic Axial Load Factor (Y2) | 3.34 | |
| Fatigue Load Limit, Radial (Cur) | 3,800 N |
