Technical data
Product specifications
Metric and imperial values are paired where the manufacturer provides both. Expand a section to review its parameters.
Core specifications13 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Series | B7221 | |
| Bore diameter | d | 105 mm |
| Outside diameter | D | 190 mm |
| Width | B | 36 mm |
| Basic dynamic load rating | C | 156 kN |
| Basic static load rating | C0 | 99 kN |
| Fatigue load limit | Pu | 8.6 kN |
| Mass | ≈m | 3.89 kg |
| Precision class | P4S — Tolerance class P4S, FAG standard better than P4 to ISO 492:2023 | |
| Sealing | Without — Not sealed | |
| Cage | T — Laminated fabric cage | |
| Minimum operating temperature | Tmin | -30 °C |
| Maximum operating temperature | Tmax | 100 °C |
Product characteristics6 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Preload class | L | Preload light |
| Contact angle | E | Contact angle 25° |
| Tolerance class | P4S | Tolerance class P4S, FAG standard better than P4 to ISO 492:2023 |
| Type of Seal | Without | Not sealed |
| Cage | T | Laminated fabric cage |
| Arrangement bearing set | U | Single bearing |
Main Dimensions & Performance Data9 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore diameter | d | 105 mm4.134 in |
| Outside diameter | D | 190 mm7.48 in |
| Width | B | 36 mm1.417 in |
| Basic dynamic load rating, radial | Cr | 156,000 N35,071.942 lbf |
| Basic static load rating, radial | C0r | 99,000 N22,257.194 lbf |
| Fatigue load limit, radial | Cur | 8,600 N1,933.453 lbf |
| Limiting speed for grease lubrication | nG Grease | 6,300 1/min |
| Limiting speed for oil lubrication | nG Oil | 9,500 1/min |
| Mass | ≈m | 3.89 kg8.576 lbs |
Mounting dimensions11 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Diameter shaft shoulder | da | 120.5 mm4.744 in |
| Diameter shaft shoulder clearance | da | h12 |
| Shoulder diameter outer ring | Da | 174.5 mm6.87 in |
| Shoulder diameter outer ring clearance | Da | H12 |
| Maximum recess radius | ra max | 2.1 mm0.083 in |
| Maximum recess radius | ra1 max | 1 mm0.039 in |
| Minimum diameter injection pitch | Etk min | 132.2 mm5.205 in |
| Maximum diameter injection pitch | Etk max | 141.2 mm5.559 in |
| Minimum diameter injection pitch | Etk1 min | 132.2 mm5.205 in |
| Maximum diameter injection pitch | Etk1 max | 141.2 mm5.559 in |
| Distance between the apexes of the pressure cones | a | 52.4 mm2.063 in |
Dimensions3 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Minimum chamfer dimension | rmin | 2.1 mm0.083 in |
| Minimum chamfer dimension | r1 min | 2.1 mm0.083 in |
| Contact angle | α | 25 ° |
Temperature range2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Operating temperature min. | Tmin | -30 °C-22 °F |
| Operating temperature max. | Tmax | 100 °C212 °F |
Capabilities & suitability5 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 |
Manufacturer Identity8 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Schaeffler Product Code | 813606 | |
| Brand | FAG | |
| Base Type | B7221 | |
| X Life Marking | n.r. | |
| SAP material number | 0922668270000 | |
| Base product | 2305080311 | |
| Bearing X designation | B7221-E-T-P4S | |
| Mounting Manager ID | B7221-E-T-P4S |
Product Identity2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Construction | Spindle bearing B72..-E, adjusted, in pairs or sets, contact angle α = 25°, restricted tolerances | |
| Short Description | Spindle bearing |
Additional information9 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Preload force light | FV L | 1,545 N347.347 lbf |
| Preload force medium | FV M | 5,006 N1,125.45 lbf |
| Preload force heavy | FV H | 10,249 N2,304.182 lbf |
| Lift-off force light | KaE L | 4,508 N1,013.489 lbf |
| Lift-off force medium | KaE M | 15,092 N3,392.986 lbf |
| Lift-off force heavy | KaE H | 31,918 N7,175.809 lbf |
| Axial rigidity light | ca L | 312 N/µm |
| Axial rigidity medium | ca M | 488 N/µm |
| Axial rigidity heavy | ca H | 656 N/µm |
Technical Data31 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore Diameter (D) | 105 mm | |
| Outside Diameter (D) | 190 mm | |
| Width (B) | 36 mm | |
| Basic Dynamic Load Rating, Radial (Cr) | 156,000 N | |
| Basic Static Load Rating, Radial (C0R) | 99,000 N | |
| Operating Temperature Min. (Tmin) | -30 °C | |
| Operating Temperature Max. (Tmax) | 100 °C | |
| Axial Rigidity Heavy (Ca H) | 656 N/µm | |
| Axial Rigidity Light (Ca L) | 312 N/µm | |
| Axial Rigidity Medium (Ca M) | 488 N/µm | |
| Diameter Shaft Shoulder (Da) | 120.5 mm | |
| Lift Off Force Heavy (Kae H) | 31,918 N | |
| Lift Off Force Light (Kae L) | 4,508 N | |
| Lift Off Force Medium (Kae M) | 15,092 N | |
| Limiting Speed For Oil Lubrication (Ng Oil) | 9,500 1/min | |
| Maximum Diameter Injection Pitch (Etk1 Ma) | 141.2 mm | |
| Maximum Diameter Injection Pitch (Etk Max) | 141.2 mm | |
| Minimum Diameter Injection Pitch (Etk1 Mi) | 132.2 mm | |
| Preload Force Heavy (Fv H) | 10,249 N | |
| Preload Force Light (Fv L) | 1,545 N | |
| Preload Force Medium (Fv M) | 5,006 N | |
| Shoulder Diameter Outer Ring (Da) | 174.5 mm | |
| Limiting Speed For Grease Lubrication (Ng Grea) | 6,300 1/min | |
| Minimum Diameter Injection Pitch (Etk Min) | 132.2 mm | |
| Fatigue Load Limit, Radial (Cur) | 8,600 N | |
| Minimum Chamfer Dimension (Rmin) | 2.1 mm | |
| Maximum Fillet Radius (Ra Max) | 2.1 mm | |
| Maximum Recess Radius (Ra1 Max) | 1 mm | |
| Minimum Chamfer Dimension (R1 Min) | 2.1 mm | |
| Contact Angle (Α) | 25 ° | |
| Distance Between The Apexes Of The Pressure Cones (A) | 52.4 mm |
