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 | HCB71905 | |
| Bore diameter | d | 25 mm |
| Outside diameter | D | 42 mm |
| Width | B | 9 mm |
| Basic dynamic load rating | C | 7.6 kN |
| Basic static load rating | C0 | 3.45 kN |
| Fatigue load limit | Pu | 0.28 kN |
| Mass | ≈m | 0.04 kg |
| Precision class | P4S — Tolerance class P4S, FAG standard better than P4 to ISO 492:2023 | |
| Sealing | 2RSD — Non-contact sealed on both sides and greased “for life” | |
| Cage | T — Laminated fabric cage | |
| Minimum operating temperature | Tmin | -30 °C |
| Maximum operating temperature | Tmax | 80 °C |
Product characteristics7 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Contact angle | E | Contact angle 25° |
| Type of Seal | 2RSD | Non-contact sealed on both sides and greased “for life” |
| 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 Data8 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore diameter | d | 25 mm0.984 in |
| Outside diameter | D | 42 mm1.654 in |
| Width | B | 9 mm0.354 in |
| Basic dynamic load rating, radial | Cr | 7,600 N1,708.633 lbf |
| Basic static load rating, radial | C0r | 3,450 N775.629 lbf |
| Fatigue load limit, radial | Cur | 280 N62.95 lbf |
| Limiting speed for grease lubrication | nG Grease | 45,000 1/min |
| Mass | ≈m | 0.04 kg0.088 lbs |
Mounting dimensions7 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Diameter shaft shoulder | da | 29 mm1.142 in |
| Diameter shaft shoulder clearance | da | h12 |
| Shoulder diameter outer ring | Da | 38.5 mm1.516 in |
| Shoulder diameter outer ring clearance | Da | H12 |
| Maximum recess radius | ra max | 0.3 mm0.012 in |
| Maximum recess radius | ra1 max | 0.15 mm0.006 in |
| Distance between the apexes of the pressure cones | a | 12.3 mm0.484 in |
Dimensions3 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Minimum chamfer dimension | rmin | 0.3 mm0.012 in |
| Minimum chamfer dimension | r1 min | 0.3 mm0.012 in |
| Contact angle | α | 25 ° |
Temperature range2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Operating temperature min. | Tmin | -30 °C-22 °F |
| Operating temperature max. | Tmax | 80 °C176 °F |
Capabilities & suitability5 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Radial load capacity | Yes | |
| Axial load capacity in one direction | Yes | |
| Lifetimelubricationfreedomfrommaintenance | Yes | |
| Suitable for grease lubrication | Yes | |
| Sealedonbothsides | Yes |
Manufacturer Identity7 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Schaeffler Product Code | 1741120 | |
| Brand | FAG | |
| Base Type | HCB71905 | |
| X Life Marking | n.r. | |
| Base product | 2305080312 | |
| Bearing X designation | HCB71905-E-2RSD-T-P4S | |
| Mounting Manager ID | HCB71905-E-2RSD-T-P4S |
Product Identity2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Construction | Spindle bearing HCB719..-E-2RSD, adjusted, in pairs or sets, contact angle α = 25°, with ceramic balls, lip seals on both sides, non-contact, restricted tolerances | |
| Short Description | Spindle bearing |
Additional information9 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Preload force light | FV L | 22 N4.946 lbf |
| Preload force medium | FV M | 107 N24.056 lbf |
| Preload force heavy | FV H | 246 N55.306 lbf |
| Lift-off force light | KaE L | 60 N13.489 lbf |
| Lift-off force medium | KaE M | 310 N69.694 lbf |
| Lift-off force heavy | KaE H | 735 N165.243 lbf |
| Axial rigidity light | ca L | 49 N/µm |
| Axial rigidity medium | ca M | 87 N/µm |
| Axial rigidity heavy | ca H | 121 N/µm |
Technical Data26 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore Diameter (D) | 25 mm | |
| Outside Diameter (D) | 42 mm | |
| Width (B) | 9 mm | |
| Basic Dynamic Load Rating, Radial (Cr) | 7,600 N | |
| Basic Static Load Rating, Radial (C0R) | 3,450 N | |
| Operating Temperature Min. (Tmin) | -30 °C | |
| Operating Temperature Max. (Tmax) | 80 °C | |
| Axial Rigidity Heavy (Ca H) | 121 N/µm | |
| Axial Rigidity Light (Ca L) | 49 N/µm | |
| Axial Rigidity Medium (Ca M) | 87 N/µm | |
| Diameter Shaft Shoulder (Da) | 29 mm | |
| Lift Off Force Heavy (Kae H) | 735 N | |
| Lift Off Force Light (Kae L) | 60 N | |
| Lift Off Force Medium (Kae M) | 310 N | |
| Preload Force Heavy (Fv H) | 246 N | |
| Preload Force Light (Fv L) | 22 N | |
| Preload Force Medium (Fv M) | 107 N | |
| Shoulder Diameter Outer Ring (Da) | 38.5 mm | |
| Limiting Speed For Grease Lubrication (Ng Grea) | 45,000 1/min | |
| Fatigue Load Limit, Radial (Cur) | 280 N | |
| Minimum Chamfer Dimension (Rmin) | 0.3 mm | |
| Maximum Fillet Radius (Ra Max) | 0.3 mm | |
| Maximum Recess Radius (Ra1 Max) | 0.15 mm | |
| Minimum Chamfer Dimension (R1 Min) | 0.3 mm | |
| Contact Angle (Α) | 25 ° | |
| Distance Between The Apexes Of The Pressure Cones (A) | 12.3 mm |
