JSA050XPO bearings ( 5 inch x 5.5 inch x 0.25 inch) have the advantages of Extremely compact, lightweight design, composite load-bearing capacity, high rigidity, and flexible installation, and are therefore widely used in the Robotics, aerospace, semiconductor equipment, medical instruments and optoelectronic turntables.

| Part Number | JSA050XPO |
| Bore | Cylindrical |
| Balls | standard 1/8" balls |
| Bearing Type | Inch Sealed or Shielded Type X 4-Point Contact Ball Bearings |
| Cage | Brass; snapover separator |
| Series | JSA SERIES 1/4" X 1/4" |
| Race Width Tolerance | +0.000 -0.005" |
| Contact angle [°] | 30 |
| Temperature - T(min) [°C] | -30 |
| Temperature - T(max) [°C] | 110 |
| Seal type | J = Buna N Rubber Seal (Double Sealed) |
| Units | Inch |
| Load | excellent for moment loading and reversing axial loading |
| Rolling Element Type | Balls |
| Ball Material | AISI 52100 Steel |
| Rolling Element Material | AISI 52100 Steel |
| Precision Class | ISO Class NORMAL / ABEC-1 |
| Equivalent | KAYDON KDY.JA050XP0 SILVERTHIN JSA050XP0 SKF FPXA5002RS1 FAG L18QA5002RSD NSK NBX12706DD INA CSXA0502RS SSB RJA050XP0 NTN KXA127LL |
| Interchangeable | SILVER THIN JSA050XPO |
| Rows NO. | One |
| L1 Land Diameter [inch] | 5.186 |
| L2 Land Diameter [inch] | 5.314 |
| Fillet radius (Note 2) max | 0.025" |
| RADIAL DYNAMIC [lbf] | 860 |
| RADIAL STATIC [lbf] | 1590 |
| THRUST DYNAMIC [lbf] | 1399 |
| THRUST STATIC [lbf] | 3979 |
| MOMENT DYNAMIC [LBS-in] | 1695 |
| MOMENT STATIC [LBS-in] | 4180 |
| TORQUE MAX NO LOAD [OZ-IN] | 36 |
| APPROX WEIGHT [lb] | 0.24 |
The JSA050XPO Thin-section four-point contact ball bearings are mainly composed of a thin-walled inner ring, a thin-walled outer ring, steel balls, and a cage. The raceway has a Gothic arch shape, and the steel balls form four-point contact with the inner and outer rings. The cross-sectional dimensions are constant and extremely thin.
Thin-section four-point contact ball bearings utilize a thin-walled constant cross-section design, resulting in lightweight construction and a small footprint. A single bearing can simultaneously withstand radial loads, bidirectional axial loads, and overturning moments. They possess high rigidity, high-speed capability, and are easy to install, making them a viable replacement for traditional combined bearings.















