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 | B71904 | |
| Bore diameter | d | 20 mm |
| Outside diameter | D | 37 mm |
| Width | B | 9 mm |
| Basic dynamic load rating | C | 7 kN |
| Basic static load rating | C0 | 3.05 kN |
| Fatigue load limit | Pu | 0.325 kN |
| Mass | ≈m | 0.038 kg |
| Precision class | P4S — Tolerance class P4S, FAG standard better than P4 to ISO 492:2023 | |
| Cage | T — Laminated fabric cage | |
| Lubricant | GA21 — Grease for super precision bearings, standard | |
| Minimum operating temperature | Tmin | -30 °C |
| Maximum operating temperature | Tmax | 80 °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 |
| Cage | T | Laminated fabric cage |
| Arrangement bearing set | U | Single bearing |
| Lubricant | GA21 | Grease for super precision bearings, standard |
Main Dimensions & Performance Data8 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore diameter | d | 20 mm0.787 in |
| Outside diameter | D | 37 mm1.457 in |
| Width | B | 9 mm0.354 in |
| Basic dynamic load rating, radial | Cr | 7,000 N1,573.741 lbf |
| Basic static load rating, radial | C0r | 3,050 N685.701 lbf |
| Fatigue load limit, radial | Cur | 325 N73.067 lbf |
| Limiting speed for grease lubrication | nG Grease | 38,000 1/min |
| Mass | ≈m | 38 g1.34 oz |
Mounting dimensions7 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Diameter shaft shoulder | da | 24 mm0.945 in |
| Diameter shaft shoulder clearance | da | h12 |
| Shoulder diameter outer ring | Da | 33.5 mm1.319 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 | 11.1 mm0.437 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 Identity9 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Schaeffler Product Code | 361866 | |
| Brand | FAG | |
| Base Type | B71904 | |
| Old Designation | ["B71904E.2RSD.T.P4S.UL"] | |
| X Life Marking | n.r. | |
| SAP material number | 0385742500000 | |
| Base product | 2305080311 | |
| Bearing X designation | B71904-E-2RSD-T-P4S | |
| Mounting Manager ID | B71904-E-2RSD-T-P4S |
Product Identity2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Construction | Spindle bearing B719..-E-2RSD, adjusted, in pairs or sets, contact angle α = 25°, lip seals on both sides, non-contact, restricted tolerances | |
| Short Description | Spindle bearing |
Additional information9 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Preload force light | FV L | 37 N8.318 lbf |
| Preload force medium | FV M | 170 N38.219 lbf |
| Preload force heavy | FV H | 384 N86.331 lbf |
| Lift-off force light | KaE L | 108 N24.281 lbf |
| Lift-off force medium | KaE M | 516 N116.007 lbf |
| Lift-off force heavy | KaE H | 1,208 N271.583 lbf |
| Axial rigidity light | ca L | 47 N/µm |
| Axial rigidity medium | ca M | 83 N/µm |
| Axial rigidity heavy | ca H | 117 N/µm |
Technical Data26 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore Diameter (D) | 20 mm | |
| Outside Diameter (D) | 37 mm | |
| Width (B) | 9 mm | |
| Basic Dynamic Load Rating, Radial (Cr) | 7,000 N | |
| Basic Static Load Rating, Radial (C0R) | 3,050 N | |
| Operating Temperature Min. (Tmin) | -30 °C | |
| Operating Temperature Max. (Tmax) | 80 °C | |
| Axial Rigidity Heavy (Ca H) | 117 N/µm | |
| Axial Rigidity Light (Ca L) | 47 N/µm | |
| Axial Rigidity Medium (Ca M) | 83 N/µm | |
| Diameter Shaft Shoulder (Da) | 24 mm | |
| Lift Off Force Heavy (Kae H) | 1,208 N | |
| Lift Off Force Light (Kae L) | 108 N | |
| Lift Off Force Medium (Kae M) | 516 N | |
| Preload Force Heavy (Fv H) | 384 N | |
| Preload Force Light (Fv L) | 37 N | |
| Preload Force Medium (Fv M) | 170 N | |
| Shoulder Diameter Outer Ring (Da) | 33.5 mm | |
| Limiting Speed For Grease Lubrication (Ng Grea) | 38,000 1/min | |
| Fatigue Load Limit, Radial (Cur) | 325 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) | 11.1 mm |
