Technical data
Product specifications
Metric and imperial values are paired where the manufacturer provides both. Expand a section to review its parameters.
Core specifications17 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Series | 1228 | |
| Bore diameter | d | 140 mm |
| Outside diameter | D | 250 mm |
| Width | B | 50 mm |
| Basic dynamic load rating | C | 163 kN |
| Basic static load rating | C0 | 74 kN |
| Fatigue load limit | Pu | 3.35 kN |
| Reference speed | nref | 3650 r/min |
| Limiting speed | nG | 3900 r/min |
| Mass | ≈m | 11.1 kg |
| Precision class | PN — Normal (ISO 492:2023) | |
| Internal clearance | CN (Group N) — Normal internal clearance | |
| Sealing | Without — Not sealed | |
| Cage | M — 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 characteristics6 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore type | Z | Cylindrical |
| Type of Seal | Without | Not sealed |
| Cage | M | Solid brass cage, ball guided |
| Tolerance class | PN | Normal (ISO 492:2023) |
| Radial internal clearance | CN (Group N) | Normal internal clearance |
| Lubricant | Without | Bearing not greased |
Main Dimensions & Performance Data9 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore diameter | d | 140 mm5.512 in |
| Outside diameter | D | 250 mm9.843 in |
| Width | B | 50 mm1.969 in |
| Basic dynamic load rating, radial | Cr | 163,000 N36,645.683 lbf |
| Basic static load rating, radial | C0r | 74,000 N16,636.691 lbf |
| Fatigue load limit, radial | Cur | 3,350 N753.147 lbf |
| Limiting speed | nG | 3,900 1/min |
| Reference speed | nϑr | 3,650 1/min |
| Mass | ≈m | 11.1 kg24.471 lbs |
Mounting dimensions3 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Minimum diameter shaft shoulder | da min | 154 mm6.063 in |
| Maximum diameter of housing shoulder | Da max | 236 mm9.291 in |
| Maximum fillet radius | ra max | 2.5 mm0.098 in |
Dimensions4 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Minimum chamfer dimension | rmin | 3 mm0.118 in |
| Shoulder diameter outer ring | D1 | 220.5 mm8.681 in |
| Shoulder diameter inner ring | d1 | 175 mm6.89 in |
| Overhang rolling element | C1 | 2.7 mm0.106 in |
Temperature range2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Operating temperature min. | Tmin | -30 °C-22 °F |
| Operating temperature max. | Tmax | 200 °C392 °F |
Calculation factors4 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Limiting value of Fa/Fr for the applicability of diff. Values of factors X and Y | e | 0.21 |
| Dynamic axial load factor | Y1 | 3.03 |
| Dynamic axial load factor | Y2 | 4.68 |
| Static axial load factor | Y0 | 3.17 |
Capabilities & suitability8 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Radial load capacity | Yes | |
| Axial load capacity in one direction | Yes | |
| Axial load capacity in both directions | Yes | |
| Suitable for grease lubrication | Yes | |
| Suitable for oil lubrication | Yes | |
| Unsealed design | Yes | |
| Staticangularerrorandmisalignment | Yes | |
| Dynamicangularerrorandmisalignment | Yes |
Manufacturer Identity10 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Schaeffler Product Code | 365814 | |
| Brand | FAG | |
| Base Type | 1228 | |
| Old Designation | ["1228M"] | |
| X Life Marking | n.r. | |
| SAP material number | 0190100870000 | |
| Base product | 2305080601 | |
| Bearing X designation | 1228-M | |
| Mounting Manager ID | 1228-M | |
| Grease application ID | 1228-M |
Product Identity2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Construction | Self-aligning ball bearing 12..-M, solid brass cage | |
| Short Description | Self-aligning ball bearing |
Technical Data21 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore Diameter (D) | 140 mm | |
| Outside Diameter (D) | 250 mm | |
| Width (B) | 50 mm | |
| Basic Dynamic Load Rating, Radial (Cr) | 163,000 N | |
| Basic Static Load Rating, Radial (C0R) | 74,000 N | |
| Operating Temperature Min. (Tmin) | -30 °C | |
| Limiting Speed (Ng) | 3,900 1/min | |
| Operating Temperature Max. (Tmax) | 200 °C | |
| Reference Speed (Nϑr) | 3,650 1/min | |
| Fatigue Load Limit, Radial (Cur) | 3,350 N | |
| Limiting Value Of Fa/Fr For The Applicability Of Diff. Values Of Factors X And Y (E) | 0.21 | |
| Minimum Diameter Shaft Shoulder (Da Min) | 154 mm | |
| Shoulder Diameter Inner Ring (D1) | 175 mm | |
| Dynamic Axial Load Factor (Y1) | 3.03 | |
| Maximum Diameter Of Housing Shoulder (Da Max) | 236 mm | |
| Minimum Chamfer Dimension (Rmin) | 3 mm | |
| Overhang Rolling Element (C1) | 2.7 mm | |
| Maximum Fillet Radius (Ra Max) | 2.5 mm | |
| Shoulder Diameter Outer Ring (D1) | 220.5 mm | |
| Dynamic Axial Load Factor (Y2) | 4.68 | |
| Static Axial Load Factor (Y0) | 3.17 |