Technical data
Product specifications
Metric and imperial values are paired where the manufacturer provides both. Expand a section to review its parameters.
Core specifications14 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Series | HCB71918 | |
| Bore diameter | d | 90 mm |
| Outside diameter | D | 125 mm |
| Width | B | 18 mm |
| Basic dynamic load rating | C | 45.5 kN |
| Basic static load rating | C0 | 31.5 kN |
| Fatigue load limit | Pu | 2.47 kN |
| Mass | ≈m | 0.46774 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 | |
| Lubricant | GA21 — Grease for super precision bearings, standard | |
| 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” |
| 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 |
| 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 | 45,500 N10,229.317 lbf |
| Basic static load rating, radial | C0r | 31,500 N7,081.835 lbf |
| Fatigue load limit, radial | Cur | 2,470 N555.306 lbf |
| Limiting speed for grease lubrication | nG Grease | 13,000 1/min |
| Mass | ≈m | 467.74 g16.499 oz |
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 | 34.1 mm1.343 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 | 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 | 363432 | |
| Brand | FAG | |
| Base Type | HCB71918 | |
| Old Designation | ["HCB71918E.2RSD.T.P4S.UL"] | |
| X Life Marking | n.r. | |
| SAP material number | 0385982480000 | |
| Base product | 2305080312 | |
| Bearing X designation | HCB71918-E-2RSD-T-P4S | |
| Mounting Manager ID | HCB71918-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 | 147 N33.049 lbf |
| Preload force medium | FV M | 648 N145.683 lbf |
| Preload force heavy | FV H | 1,450 N325.989 lbf |
| Lift-off force light | KaE L | 421 N94.649 lbf |
| Lift-off force medium | KaE M | 1,897 N426.484 lbf |
| Lift-off force heavy | KaE H | 4,337 N975.045 lbf |
| Axial rigidity light | ca L | 160 N/µm |
| Axial rigidity medium | ca M | 272 N/µm |
| Axial rigidity heavy | ca H | 369 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) | 45,500 N | |
| Basic Static Load Rating, Radial (C0R) | 31,500 N | |
| Operating Temperature Min. (Tmin) | -30 °C | |
| Operating Temperature Max. (Tmax) | 80 °C | |
| Axial Rigidity Heavy (Ca H) | 369 N/µm | |
| Axial Rigidity Light (Ca L) | 160 N/µm | |
| Axial Rigidity Medium (Ca M) | 272 N/µm | |
| Diameter Shaft Shoulder (Da) | 97 mm | |
| Lift Off Force Heavy (Kae H) | 4,337 N | |
| Lift Off Force Light (Kae L) | 421 N | |
| Lift Off Force Medium (Kae M) | 1,897 N | |
| Preload Force Heavy (Fv H) | 1,450 N | |
| Preload Force Light (Fv L) | 147 N | |
| Preload Force Medium (Fv M) | 648 N | |
| Shoulder Diameter Outer Ring (Da) | 119 mm | |
| Limiting Speed For Grease Lubrication (Ng Grea) | 13,000 1/min | |
| Fatigue Load Limit, Radial (Cur) | 2,470 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) | 25 ° | |
| Distance Between The Apexes Of The Pressure Cones (A) | 34.1 mm |
