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 | 6321 | |
| Bore diameter | d | 105 mm |
| Outside diameter | D | 225 mm |
| Width | B | 49 mm |
| Basic dynamic load rating | C | 188 kN |
| Basic static load rating | C0 | 150 kN |
| Fatigue load limit | Pu | 8.1 kN |
| Reference speed | nref | 4450 r/min |
| Limiting speed | nG | 5300 r/min |
| Mass | ≈m | 9.63 kg |
| Precision class | PN — Normal (ISO 492:2023) | |
| Internal clearance | C3 (Group 3) — Internal clearance larger than CN | |
| Sealing | Without — Not sealed | |
| Cage | M — Solid brass cage, rolling element guided | |
| Lubricant | Without — Bearing not greased | |
| Minimum operating temperature | Tmin | -30 °C |
| Maximum operating temperature | Tmax | 150 °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 characteristics8 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Type of Seal | Without | Not sealed |
| Cage | M | Solid brass cage, rolling element guided |
| Tolerance class | PN | Normal (ISO 492:2023) |
| Dimensional / heat stabilization | S0 | Rings dimensional stabilized up to 150° |
| Lubricant | Without | Bearing not greased |
| Radial internal clearance | C3 (Group 3) | Internal clearance larger than CN |
| Bore type | Z | Cylindrical |
| Coating | J20GA | Current insulation, outer ring ceramic coated |
Main Dimensions & Performance Data9 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore diameter | d | 105 mm4.134 in |
| Outside diameter | D | 225 mm8.858 in |
| Width | B | 49 mm1.929 in |
| Basic dynamic load rating, radial | Cr | 188,000 N42,266.187 lbf |
| Basic static load rating, radial | C0r | 150,000 N33,723.022 lbf |
| Fatigue load limit, radial | Cur | 8,100 N1,821.043 lbf |
| Limiting speed | nG | 5,300 1/min |
| Reference speed | nϑr | 4,450 1/min |
| Mass | ≈m | 9.63 kg21.23 lbs |
Mounting dimensions3 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Minimum diameter shaft shoulder | da min | 119 mm4.685 in |
| Maximum diameter of housing shoulder | Da max | 211 mm8.307 in |
| Maximum fillet radius | ra max | 2.5 mm0.098 in |
Dimensions3 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Minimum chamfer dimension | rmin | 3 mm0.118 in |
| Shoulder diameter outer ring | D1 | 188.5 mm7.421 in |
| Shoulder diameter inner ring | d1 | 144.3 mm5.681 in |
Temperature range2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Operating temperature min. | Tmin | -30 °C-22 °F |
| Operating temperature max. | Tmax | 150 °C302 °F |
Calculation factors1 parameter
| Parameter | Symbol | Value |
|---|---|---|
| Calculation factor | f0 | 13.7 |
Capabilities & suitability7 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 | |
| Currentinsulated | Yes |
Manufacturer Identity8 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Schaeffler Product Code | 3513883 | |
| Brand | FAG | |
| Base Type | 6321 | |
| SAP material number | 3037583410030 | |
| Base product | 2305080101 | |
| Bearing X designation | 6321-M-J20GA-C3 | |
| Mounting Manager ID | 6321-M-J20GA-C3 | |
| Grease application ID | 6321-M-J20GA-C3 |
Product Identity2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Construction | Deep groove ball bearing 63..-M-J20GA, single row, solid brass cage, ceramic coated | |
| Short Description | Deep groove ball bearing |
Technical Data17 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore Diameter (D) | 105 mm | |
| Outside Diameter (D) | 225 mm | |
| Width (B) | 49 mm | |
| Basic Dynamic Load Rating, Radial (Cr) | 188,000 N | |
| Basic Static Load Rating, Radial (C0R) | 150,000 N | |
| Operating Temperature Min. (Tmin) | -30 °C | |
| Limiting Speed (Ng) | 5,300 1/min | |
| Operating Temperature Max. (Tmax) | 150 °C | |
| Reference Speed (Nϑr) | 4,450 1/min | |
| Calculation Factor (F0) | 13.7 | |
| Fatigue Load Limit, Radial (Cur) | 8,100 N | |
| Minimum Diameter Shaft Shoulder (Da Min) | 119 mm | |
| Shoulder Diameter Inner Ring (D1) | 144.3 mm | |
| Maximum Diameter Of Housing Shoulder (Da Max) | 211 mm | |
| Minimum Chamfer Dimension (Rmin) | 3 mm | |
| Maximum Fillet Radius (Ra Max) | 2.5 mm | |
| Shoulder Diameter Outer Ring (D1) | 188.5 mm |
