| Part Number | R188 |
| System of Measurement | Inch |
| Bearing Type | Ball |
| For Load Direction | Radial |
| Construction | Single Row |
| Seal Type | Open |
| Bore Dia | 0.25" |
| Bore Dia Tolerance | -0.0003" to 0" |
| Outer Dia | 0.5" |
| Outer Dia Tolerance | -0.0003" to 0" |
| Width | 0.125" |
| Width Tolerance | -0.005" to 0" |
| Ring Material | 52100 Chrome Steel |
| Ball Material | 52100 Chrome Steel |
| Cage Material | 300 Series Stainless Steel |
| Dynamic Radial Load | 207 lbf |
| Static Radial Load | 80 lbf |
| Max Speed (X1000 rpm) | 40 |
| Lubrication | Required |
| Shaft Mount Type | Press Fit |
| Temperature Range | -86 to 230 °F |
| ABEC Rating | ABEC1 (Available in ABEC3/5/7) |
| Radial Clearance Trade No. | MC3 （Available in MC1/2/4/5/6) |
| Radial Clearance | 0.00008" to 0.0005" |
| RoHS | Compliant |
| REACH | Compliant |
| Ball Dia | 0.07870" |
| Ball Qty | 8 |
| Weight | 1.6 g |
