Technical data
Product specifications
Metric and imperial values are paired where the manufacturer provides both. Expand a section to review its parameters.
Core specifications16 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Series | 7328 | |
| Bore diameter | d | 140 mm |
| Outside diameter | D | 300 mm |
| Width | B | 62 mm |
| Basic dynamic load rating | C | 310 kN |
| Basic static load rating | C0 | 375 kN |
| Fatigue load limit | Pu | 13.1 kN |
| Reference speed | nref | 2400 r/min |
| Limiting speed | nG | 3350 r/min |
| Mass | ≈m | 21.3 kg |
| Precision class | PN — Normal (ISO 492:2023) | |
| Sealing | Without — Not sealed | |
| Cage | MP — Solid brass cage, ball guided | |
| Lubricant | Without — Bearing not greased | |
| Minimum operating temperature | Tmin | -30 °C |
| Maximum operating temperature | Tmax | 200 °C |
Precision classification2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Radial ball bearing tolerance equivalent | ABEC 1Derived from ISO Normal; not a direct ABEC marking | |
| Mapping basis | ISO 492 / ANSI/ABMA 20The original manufacturer tolerance remains the controlling value. |
Product characteristics7 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Design variant | B | |
| Type of Seal | Without | Not sealed |
| Cage | MP | Solid brass cage, ball guided |
| Tolerance class | PN | Normal (ISO 492:2023) |
| Dimensional / heat stabilization | S1 | Rings dimensional stabilized up to 200° |
| Bearing with matched conditions for fitting in pairs | UO | Bearing set clearance-free in O or X arrangement |
| Lubricant | Without | Bearing not greased |
Main Dimensions & Performance Data9 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore diameter | d | 140 mm5.512 in |
| Outside diameter | D | 300 mm11.811 in |
| Width | B | 62 mm2.441 in |
| Basic dynamic load rating, radial | Cr | 310,000 N69,694.245 lbf |
| Basic static load rating, radial | C0r | 375,000 N84,307.554 lbf |
| Fatigue load limit, radial | Cur | 13,100 N2,945.144 lbf |
| Limiting speed | nG | 3,350 1/min |
| Reference speed | nϑr | 2,400 1/min |
| Mass | ≈m | 21.3 kg46.958 lbs |
Mounting dimensions5 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Minimum diameter of shaft shoulder | da min | 157 mm6.181 in |
| Maximum diameter of housing shoulder | Da max | 283 mm11.142 in |
| Maximum diameter of housing shoulder | Db max | 291 mm11.457 in |
| Maximum fillet radius of shaft | ra max | 3 mm0.118 in |
| Maximum fillet radius of housing | ra1 max | 1.5 mm0.059 in |
Dimensions6 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Minimum chamfer dimension | rmin | 4 mm0.157 in |
| Minimum chamfer dimension | r1 min | 1.5 mm0.059 in |
| Shoulder diameter on outer ring wide side face | D1 | 239.5 mm9.429 in |
| Shoulder diameter on inner ring wide side face | d1 | 204.38 mm8.046 in |
| Distance between the apexes of the pressure cones | a | 123.3 mm4.854 in |
| Contact angle | α | 40 ° |
Temperature range2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Operating temperature min. | Tmin | -30 °C-22 °F |
| Operating temperature max. | Tmax | 200 °C392 °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 Identity9 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Schaeffler Product Code | 359756 | |
| Brand | FAG | |
| Base Type | 7328 | |
| Old Designation | ["7328B.MP.UO"] | |
| SAP material number | 0191185110000 | |
| Base product | 2305080301 | |
| Bearing X designation | 7328-B-MP-UO | |
| Mounting Manager ID | 7328-B-MP-UO | |
| Grease application ID | 7328-B-MP-UO |
Product Identity2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Construction | Angular contact ball bearing 73..-B-MP, single row, solid brass cage | |
| Short Description | Angular contact ball bearing |
Additional information2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Tolerance for axial clearance or preload per set | Tol(+) | 12 µm0.00047 in |
| Axial clearance per set min. | Amin | 0 mm0 in |
Technical Data22 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore Diameter (D) | 140 mm | |
| Outside Diameter (D) | 300 mm | |
| Width (B) | 62 mm | |
| Basic Dynamic Load Rating, Radial (Cr) | 310,000 N | |
| Basic Static Load Rating, Radial (C0R) | 375,000 N | |
| Operating Temperature Min. (Tmin) | -30 °C | |
| Limiting Speed (Ng) | 3,350 1/min | |
| Operating Temperature Max. (Tmax) | 200 °C | |
| Reference Speed (Nϑr) | 2,400 1/min | |
| Maximum Diameter Of Housing Shoulder (Db Max) | 291 mm | |
| Tolerance For Axial Clearance Or Preload Per Set (Tol(+)) | 12 µm | |
| Fatigue Load Limit, Radial (Cur) | 13,100 N | |
| Minimum Diameter Shaft Shoulder (Da Min) | 157 mm | |
| Shoulder Diameter Inner Ring (D1) | 204.38 mm | |
| Maximum Diameter Of Housing Shoulder (Da Max) | 283 mm | |
| Minimum Chamfer Dimension (Rmin) | 4 mm | |
| Maximum Fillet Radius (Ra Max) | 3 mm | |
| Maximum Recess Radius (Ra1 Max) | 1.5 mm | |
| Shoulder Diameter Outer Ring (D1) | 239.5 mm | |
| Minimum Chamfer Dimension (R1 Min) | 1.5 mm | |
| Contact Angle (Α) | 40 ° | |
| Distance Between The Apexes Of The Pressure Cones (A) | 123.3 mm |