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 | M71921 | |
| Bore diameter | d | 105 mm |
| Outside diameter | D | 145 mm |
| Width | B | 20 mm |
| Basic dynamic load rating | C | 39 kN |
| Basic static load rating | C0 | 27 kN |
| Fatigue load limit | Pu | 2.55 kN |
| Limiting speed | nG | 20000 r/min |
| Mass | ≈m | 0.79 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 | C(17°) | Contact angle 17° |
| 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 Data10 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore diameter | d | 105 mm4.134 in |
| Outside diameter | D | 145 mm5.709 in |
| Width | B | 20 mm0.787 in |
| Basic dynamic load rating, radial | Cr | 39,000 N8,767.986 lbf |
| Basic static load rating, radial | C0r | 27,000 N6,070.144 lbf |
| Fatigue load limit, radial | Cur | 2,550 N573.291 lbf |
| Limiting speed for grease lubrication | nG Grease | 13,000 1/min |
| Limiting speed for oil lubrication | nG Oil | 20,000 1/min |
| Limiting speed | nG | 20,000 1/min |
| Mass | ≈m | 0.79 kg1.742 lbs |
Mounting dimensions11 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Diameter shaft shoulder | da | 112 mm4.409 in |
| Diameter shaft shoulder clearance | da | h12 |
| Shoulder diameter outer ring | Da | 138 mm5.433 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 |
| Minimum diameter injection pitch | Etk min | 118.3 mm4.657 in |
| Maximum diameter injection pitch | Etk max | 121.6 mm4.787 in |
| Minimum diameter injection pitch | Etk1 min | 114.1 mm4.492 in |
| Maximum diameter injection pitch | Etk1 max | 121.6 mm4.787 in |
| Distance between the apexes of the pressure cones | a | 29.1 mm1.146 in |
Dimensions3 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Minimum chamfer dimension | rmin | 1.1 mm0.043 in |
| Minimum chamfer dimension | r1 min | 0.6 mm0.024 in |
| Contact angle | α | 17 ° |
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 | 2062964 | |
| Brand | FAG | |
| Base Type | M71921 | |
| X Life Marking | XL | |
| Base product | 2305080313 | |
| Bearing X designation | M71921-C-T-P4S-XL | |
| Mounting Manager ID | M71921-C-T-P4S-XL |
Product Identity2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Construction | High speed spindle bearing M719..-C, adjusted, in pairs or sets, contact angle α = 17°, restricted tolerances | |
| Short Description | High speed spindle bearing |
Additional information9 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Preload force light | FV L | 281 N63.174 lbf |
| Preload force medium | FV M | 745 N167.491 lbf |
| Preload force heavy | FV H | 1,569 N352.743 lbf |
| Lift-off force light | KaE L | 827 N185.926 lbf |
| Lift-off force medium | KaE M | 2,265 N509.218 lbf |
| Lift-off force heavy | KaE H | 4,962 N1,115.558 lbf |
| Axial rigidity light | ca L | 94 N/µm |
| Axial rigidity medium | ca M | 137 N/µm |
| Axial rigidity heavy | ca H | 188 N/µm |
Technical Data32 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore Diameter (D) | 105 mm | |
| Outside Diameter (D) | 145 mm | |
| Width (B) | 20 mm | |
| Basic Dynamic Load Rating, Radial (Cr) | 39,000 N | |
| Basic Static Load Rating, Radial (C0R) | 27,000 N | |
| Operating Temperature Min. (Tmin) | -30 °C | |
| Limiting Speed (Ng) | 20,000 1/min | |
| Operating Temperature Max. (Tmax) | 100 °C | |
| Axial Rigidity Heavy (Ca H) | 188 N/µm | |
| Axial Rigidity Light (Ca L) | 94 N/µm | |
| Axial Rigidity Medium (Ca M) | 137 N/µm | |
| Diameter Shaft Shoulder (Da) | 112 mm | |
| Lift Off Force Heavy (Kae H) | 4,962 N | |
| Lift Off Force Light (Kae L) | 827 N | |
| Lift Off Force Medium (Kae M) | 2,265 N | |
| Limiting Speed For Oil Lubrication (Ng Oil) | 20,000 1/min | |
| Maximum Diameter Injection Pitch (Etk1 Ma) | 121.6 mm | |
| Maximum Diameter Injection Pitch (Etk Max) | 121.6 mm | |
| Minimum Diameter Injection Pitch (Etk1 Mi) | 114.1 mm | |
| Preload Force Heavy (Fv H) | 1,569 N | |
| Preload Force Light (Fv L) | 281 N | |
| Preload Force Medium (Fv M) | 745 N | |
| Shoulder Diameter Outer Ring (Da) | 138 mm | |
| Limiting Speed For Grease Lubrication (Ng Grea) | 13,000 1/min | |
| Minimum Diameter Injection Pitch (Etk Min) | 118.3 mm | |
| Fatigue Load Limit, Radial (Cur) | 2,550 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) | 0.6 mm | |
| Contact Angle (Α) | 17 ° | |
| Distance Between The Apexes Of The Pressure Cones (A) | 29.1 mm |
