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 | PTB71903 | |
| Bore diameter | d | 17 mm |
| Outside diameter | D | 30 mm |
| Width | B | 7 mm |
| Basic dynamic load rating | C | 4.8 kN |
| Basic static load rating | C0 | 1.97 kN |
| Fatigue load limit | Pu | 0.207 kN |
| Mass | ≈m | 0.019 kg |
| Precision class | P4 — Class 4 (ISO 492:2023) | |
| Cage | TVP — Polyamide 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 | M | Preload medium |
| Contact angle | E | Contact angle 25° |
| Tolerance class | P4 | Class 4 (ISO 492:2023) |
| Cage | TVP | Polyamide 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 | 17 mm0.669 in |
| Outside diameter | D | 30 mm1.181 in |
| Width | B | 7 mm0.276 in |
| Basic dynamic load rating, radial | Cr | 4,800 N1,079.137 lbf |
| Basic static load rating, radial | C0r | 1,970 N442.896 lbf |
| Fatigue load limit, radial | Cur | 207 N46.538 lbf |
| Limiting speed for grease lubrication | nG Grease | 40,000 1/min |
| Mass | ≈m | 0.019 kg0.042 lbs |
Mounting dimensions7 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Diameter shaft shoulder | da | 20 mm0.787 in |
| Diameter shaft shoulder clearance | da | h12 |
| Shoulder diameter outer ring | Da | 27.5 mm1.083 in |
| Shoulder diameter outer ring clearance | Da | H12 |
| Maximum recess radius | ra max | 0.3 mm0.012 in |
| Maximum recess radius | ra1 max | 0.1 mm0.004 in |
| Distance between the apexes of the pressure cones | a | 9 mm0.354 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 & suitability4 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Radial load capacity | Yes | |
| Axial load capacity in one direction | Yes | |
| Suitable for grease lubrication | Yes | |
| Sealedonbothsides | Yes |
Manufacturer Identity6 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Schaeffler Product Code | 4123519 | |
| Brand | FAG | |
| Base Type | PTB71903 | |
| Base product | 2305080311 | |
| Bearing X designation | PTB71903-E-2RSD | |
| Mounting Manager ID | PTB71903-E-2RSD |
Product Identity2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Construction | Precision bearing for Driven Tools PTB719..-E-2RSD, adjusted, in pairs or sets, contact angle α = 25°, lip seals on both sides, non-contact | |
| Short Description | Spindle bearing |
Additional information3 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Preload force medium | FV M | 111 N24.955 lbf |
| Lift-off force medium | KaE M | 333 N74.865 lbf |
| Axial rigidity medium | ca M | 65 N/µm |
Technical Data20 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore Diameter (D) | 17 mm | |
| Outside Diameter (D) | 30 mm | |
| Width (B) | 7 mm | |
| Basic Dynamic Load Rating, Radial (Cr) | 4,800 N | |
| Basic Static Load Rating, Radial (C0R) | 1,970 N | |
| Operating Temperature Min. (Tmin) | -30 °C | |
| Operating Temperature Max. (Tmax) | 80 °C | |
| Axial Rigidity Medium (Ca M) | 65 N/µm | |
| Diameter Shaft Shoulder (Da) | 20 mm | |
| Lift Off Force Medium (Kae M) | 333 N | |
| Preload Force Medium (Fv M) | 111 N | |
| Shoulder Diameter Outer Ring (Da) | 27.5 mm | |
| Limiting Speed For Grease Lubrication (Ng Grea) | 40,000 1/min | |
| Fatigue Load Limit, Radial (Cur) | 207 N | |
| Minimum Chamfer Dimension (Rmin) | 0.3 mm | |
| Maximum Fillet Radius (Ra Max) | 0.3 mm | |
| Maximum Recess Radius (Ra1 Max) | 0.1 mm | |
| Minimum Chamfer Dimension (R1 Min) | 0.3 mm | |
| Contact Angle (Α) | 25 ° | |
| Distance Between The Apexes Of The Pressure Cones (A) | 9 mm |
