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 | B71918 | |
| Bore diameter | d | 90 mm |
| Outside diameter | D | 125 mm |
| Width | B | 18 mm |
| Basic dynamic load rating | C | 48 kN |
| Basic static load rating | C0 | 35 kN |
| Fatigue load limit | Pu | 3.55 kN |
| Mass | ≈m | 0.553 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 | C | Contact angle 15° |
| 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 | 90 mm3.543 in |
| Outside diameter | D | 125 mm4.921 in |
| Width | B | 18 mm0.709 in |
| Basic dynamic load rating, radial | Cr | 48,000 N10,791.367 lbf |
| Basic static load rating, radial | C0r | 35,000 N7,868.705 lbf |
| Fatigue load limit, radial | Cur | 3,550 N798.112 lbf |
| Limiting speed for grease lubrication | nG Grease | 11,000 1/min |
| Mass | ≈m | 0.553 kg1.219 lbs |
Mounting dimensions7 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Diameter shaft shoulder | da | 97 mm3.819 in |
| Diameter shaft shoulder clearance | da | h12 |
| Shoulder diameter outer ring | Da | 119 mm4.685 in |
| Shoulder diameter outer ring clearance | Da | H12 |
| Maximum recess radius | ra max | 0.6 mm0.024 in |
| Maximum recess radius | ra1 max | 0.6 mm0.024 in |
| Distance between the apexes of the pressure cones | a | 23.4 mm0.921 in |
Dimensions3 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Minimum chamfer dimension | rmin | 1.1 mm0.043 in |
| Minimum chamfer dimension | r1 min | 1.1 mm0.043 in |
| Contact angle | α | 15 ° |
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 Identity8 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Schaeffler Product Code | 362900 | |
| Brand | FAG | |
| Base Type | B71918 | |
| X Life Marking | n.r. | |
| SAP material number | 0387584230000 | |
| Base product | 2305080311 | |
| Bearing X designation | B71918-C-2RSD-T-P4S | |
| Mounting Manager ID | B71918-C-2RSD-T-P4S |
Product Identity2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Construction | Spindle bearing B719..-C-2RSD, adjusted, in pairs or sets, contact angle α = 15°, lip seals on both sides, non-contact, restricted tolerances | |
| Short Description | Spindle bearing |
Additional information9 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Preload force light | FV L | 238 N53.507 lbf |
| Preload force medium | FV M | 796 N178.957 lbf |
| Preload force heavy | FV H | 1,615 N363.085 lbf |
| Lift-off force light | KaE L | 729 N163.894 lbf |
| Lift-off force medium | KaE M | 2,628 N590.827 lbf |
| Lift-off force heavy | KaE H | 5,691 N1,279.451 lbf |
| Axial rigidity light | ca L | 82 N/µm |
| Axial rigidity medium | ca M | 140 N/µm |
| Axial rigidity heavy | ca H | 200 N/µm |
Technical Data26 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore Diameter (D) | 90 mm | |
| Outside Diameter (D) | 125 mm | |
| Width (B) | 18 mm | |
| Basic Dynamic Load Rating, Radial (Cr) | 48,000 N | |
| Basic Static Load Rating, Radial (C0R) | 35,000 N | |
| Operating Temperature Min. (Tmin) | -30 °C | |
| Operating Temperature Max. (Tmax) | 80 °C | |
| Axial Rigidity Heavy (Ca H) | 200 N/µm | |
| Axial Rigidity Light (Ca L) | 82 N/µm | |
| Axial Rigidity Medium (Ca M) | 140 N/µm | |
| Diameter Shaft Shoulder (Da) | 97 mm | |
| Lift Off Force Heavy (Kae H) | 5,691 N | |
| Lift Off Force Light (Kae L) | 729 N | |
| Lift Off Force Medium (Kae M) | 2,628 N | |
| Preload Force Heavy (Fv H) | 1,615 N | |
| Preload Force Light (Fv L) | 238 N | |
| Preload Force Medium (Fv M) | 796 N | |
| Shoulder Diameter Outer Ring (Da) | 119 mm | |
| Limiting Speed For Grease Lubrication (Ng Grea) | 11,000 1/min | |
| Fatigue Load Limit, Radial (Cur) | 3,550 N | |
| Minimum Chamfer Dimension (Rmin) | 1.1 mm | |
| Maximum Fillet Radius (Ra Max) | 0.6 mm | |
| Maximum Recess Radius (Ra1 Max) | 0.6 mm | |
| Minimum Chamfer Dimension (R1 Min) | 1.1 mm | |
| Contact Angle (Α) | 15 ° | |
| Distance Between The Apexes Of The Pressure Cones (A) | 23.4 mm |
