KC090XPO bearings ( 9 inch x 9.75 inch x 0.375 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 | KC090XPO |
| Series | KC Series |
| Precision ABEC | Precision Class 1 per ABEC 1F |
| Thin section bearings type | Standard Open REALI-SLIM Inch Series Bearing |
| Ring | AISI 52100 steel |
| Reference From | Kaydon KC090XPO |
| Manufacturer Part Code | KC090XP0 |
| Seal type | open |
| Rolling bearing type | Four-point contact ball bearing (type X) |
| Coating | No |
| Cage | Solid brass |
| Lubricant | No |
| Unit of measurement | inch |
| Separator | P = One-piece, snap-type, stamped brass or non-metallic composite cage |
| Contact type | Four-point contact |
| Races/Balls Material | K = AISI 52100 steel rings and balls, no seals (open) |
| Weight [lb] | 0.94 |
| Contact angle - α [°] | 30 |
| Balls | Snapover separator 3/16" balls |
| Temperature - T(min) [°C] | -30 |
| Temperature - T(max) [°C] | +110 |
| Shaft diameter [inch] | 9 |
| F chamfer [inch] | 0.040 |
| H Radial cross section [inch] | 0.375 |
| Radial Thickness x Width ["] | C = 0.375 x 0.375 |
| d φ Inside [inch] | 9 |
| D Φ Outside [inch] | 9.75 |
| B Width [inch] | 0.375 |
| L1 Land Dia. [inch] | 9.277 |
| L2 Land Dia. [inch] | 9.473 |
| Cr Dynamic Radial [lbf] | 2224 |
| C0r Static Radial [lbf] | 4495 |
| Ca Dynamic Axial [lbf] | 3642 |
| C0a Static Axial [lbf] | 11248 |
| CM Dynamic Moment [lbf·in] | 7803 |
| C0M Static Moment [lbf·in] | 21096 |
The KC090XPO 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.















