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 | HCB7221 | |
| Bore diameter | d | 105 mm |
| Outside diameter | D | 190 mm |
| Width | B | 36 mm |
| Basic dynamic load rating | C | 157 kN |
| Basic static load rating | C0 | 95 kN |
| Fatigue load limit | Pu | 6.3 kN |
| Mass | ≈m | 3.25 kg |
| Precision class | P4S — Tolerance class P4S, FAG standard better than P4 to ISO 492:2023 | |
| Sealing | Without | |
| Cage | T — Laminated fabric cage | |
| Minimum operating temperature | Tmin | -30 °C |
| Maximum operating temperature | Tmax | 100 °C |
Product characteristics7 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Contact angle | E | Contact angle 25° |
| Type of Seal | Without | |
| Shape of outer surface | Standard | |
| Cage | T | Laminated fabric cage |
| Tolerance class | P4S | Tolerance class P4S, FAG standard better than P4 to ISO 492:2023 |
| Arrangement bearing set | U | Single bearing |
| Preload class | L | Preload light |
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 | 157,000 N35,296.763 lbf |
| Basic static load rating, radial | C0r | 95,000 N21,357.914 lbf |
| Fatigue load limit, radial | Cur | 6,300 N1,416.367 lbf |
| Limiting speed for grease lubrication | nG Grease | 7,500 1/min |
| Limiting speed for oil lubrication | nG Oil | 12,000 1/min |
| Mass | ≈m | 3.25 kg7.165 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 Identity7 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Schaeffler Product Code | 1741091 | |
| Brand | FAG | |
| Base Type | HCB7221 | |
| X Life Marking | n.r. | |
| Base product | 2305080312 | |
| Bearing X designation | HCB7221-E-T-P4S | |
| Mounting Manager ID | HCB7221-E-T-P4S |
Product Identity2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Construction | Spindle bearing HCB72..-E, adjusted, in pairs or sets, contact angle α = 25°, with ceramic balls, restricted tolerances | |
| Short Description | Spindle bearing |
Additional information9 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Preload force light | FV L | 800 N179.856 lbf |
| Preload force medium | FV M | 2,742 N616.457 lbf |
| Preload force heavy | FV H | 5,723 N1,286.646 lbf |
| Lift-off force light | KaE L | 2,303 N517.761 lbf |
| Lift-off force medium | KaE M | 8,067 N1,813.624 lbf |
| Lift-off force heavy | KaE H | 17,220 N3,871.403 lbf |
| Axial rigidity light | ca L | 278 N/µm |
| Axial rigidity medium | ca M | 434 N/µm |
| Axial rigidity heavy | ca H | 577 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) | 157,000 N | |
| Basic Static Load Rating, Radial (C0R) | 95,000 N | |
| Operating Temperature Min. (Tmin) | -30 °C | |
| Operating Temperature Max. (Tmax) | 100 °C | |
| Axial Rigidity Heavy (Ca H) | 577 N/µm | |
| Axial Rigidity Light (Ca L) | 278 N/µm | |
| Axial Rigidity Medium (Ca M) | 434 N/µm | |
| Diameter Shaft Shoulder (Da) | 120.5 mm | |
| Lift Off Force Heavy (Kae H) | 17,220 N | |
| Lift Off Force Light (Kae L) | 2,303 N | |
| Lift Off Force Medium (Kae M) | 8,067 N | |
| Limiting Speed For Oil Lubrication (Ng Oil) | 12,000 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) | 5,723 N | |
| Preload Force Light (Fv L) | 800 N | |
| Preload Force Medium (Fv M) | 2,742 N | |
| Shoulder Diameter Outer Ring (Da) | 174.5 mm | |
| Limiting Speed For Grease Lubrication (Ng Grea) | 7,500 1/min | |
| Minimum Diameter Injection Pitch (Etk Min) | 132.2 mm | |
| Fatigue Load Limit, Radial (Cur) | 6,300 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 |
