FPAC 2500 Bore 25 Inch, Imperial Open Type A, Angular Contact Ball Bearings
The FPAC 2500 Thin-section angular contact ball bearings are primarily used in applications with stringent requirements for weight, space, and precision, such as aerospace gyroscopes, robotic joints, medical CT scanner gantries, machine tool spindles, semiconductor manufacturing equipment, optical instruments (e.g., telescopes), and precision rotary tables.
The FPAC 2500 bearing is a Inch Open Type A Angular Contact Ball Bearings with an inner diameter of 25 inch , an outer diameter of 25.75 inch, a width of 0.375 inch. It typically uses ISO Class NORMAL / ABEC-1 grade precision tolerances and AISI 52100 Steel rings, AISI 52100 Steel rolling mlement. Its dynamic radial rated load is approximately 3235 N, its static radial rated load is approximately 14900 N. Its dynamic axial rated load is approximately 40076 N, its static axial rated load is approximately 192509 N. Open (No seal) type, together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.
FPAC 2500 bearings ( 25 inch x 25.75 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 Robot joints, aerospace, semiconductor equipment, medical instruments and optoelectronic turntables.
| Part Number | FPAC 2500 |
| Bearing Type | Inch Open Type A Angular Contact Ball Bearings |
| Equivalent | KAYDON KDY.KC250AR0 SILVERTHIN SC250AR0 SKF FPAC2500 FAG L15SA2500 NSK NBA63509 INA CSEC250 SSB RC250AR0 NTN KYC250 |
| Interchangeable | SKF FPAC 2500 |
| Cage | Brass; one piece pocket separator |
| Series | FPAC SERIES 3/8" X 3/8" |
| Balls | standard 3/16" balls |
| Race Width Tolerance | +0.000 -0.005" |
| Contact angle [°] | 30 |
| Seal type | Open (No seal) |
| Manufacturer Part Code | FPAC2500 |
| Units | Inch |
| Precision Class | ISO Class NORMAL / ABEC-1 |
| Rows NO. | One |
| B φ Inside [inch] | 25 |
| D Φ Outside [inch] | 25.75 |
| Width [inch] | 0.375 |
| L1 [inch] | 25.277 |
| L2 [inch] | 25.473 |
| L3 [inch] | 25.5 |
| (Note 2) max | 0.040" |
| RADIAL DYNAMIC [lbf] | 3235 |
| RADIAL STATIC [lbf] | 14900 |
| THRUST DYNAMIC [lbf] | 9009 |
| THRUST STATIC [lbf] | 43276 |
| APPROX WEIGHT [lb] | 2.69 |
The FPAC 2500 Thin-section angular contact ball bearings mainly consist of a thin-walled inner ring, a thin-walled outer ring, steel balls, and a cage. Their cross-sectional dimensions are constant and extremely thin, with contact angles typically of 15°, 25°, or 30°, making them suitable for space-constrained installations.
Thin-section angular contact ball bearings utilize a thin-walled, constant cross-section design, resulting in lightweight construction and a small footprint, effectively reducing the overall weight of equipment. They can simultaneously withstand radial and axial loads, possessing high rigidity, high-speed capability, and good positioning accuracy, and are easy to install.
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