KYB025 Bore 2.5 Inch, Imperial Open Type A, Angular Contact Ball Bearings
The KYB025 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 KYB025 bearing is a Inch Open Type A Angular Contact Ball Bearings with an inner diameter of 2.5 inch , an outer diameter of 3.125 inch, a width of 0.3125 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 675 N, its static radial rated load is approximately 1340 N. Its dynamic axial rated load is approximately 7072 N, its static axial rated load is approximately 17169 N. Open (No seal) type, together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.
Interchange code: KAYDON KDN.KB025AR0, SILVERTHIN SB025AR0, SKF FPAB208, FAG L15RA208, NSK NBA6307, INA CSEB025, SSB RB025AR0, NTN KYB025
KYB025 bearings ( 2.5 inch x 3.125 inch x 0.3125 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 | KYB025 |
| Bearing Type | Inch Open Type A Angular Contact Ball Bearings |
| Equivalent | KAYDON KDN.KB025AR0 SILVERTHIN SB025AR0 SKF FPAB208 FAG L15RA208 NSK NBA6307 INA CSEB025 SSB RB025AR0 NTN KYB025 |
| Interchangeable | NTN KYB025 |
| Cage | Brass; one piece pocket separator |
| Series | KYB SERIES 5/16" X 5/16" |
| Balls | standard 5/32" balls |
| Race Width Tolerance | +0.000 -0.005" |
| Contact angle [°] | 30 |
| Seal type | Open (No seal) |
| Units | Inch |
| Precision Class | ISO Class NORMAL / ABEC-1 |
| Rows NO. | One |
| B φ Inside [inch] | 2.5 |
| D Φ Outside [inch] | 3.125 |
| Width [inch] | 0.3125 |
| L1 [inch] | 2.731 |
| L2 [inch] | 2.893 |
| L3 [inch] | 2.964 |
| (Note 2) max | 0.040" |
| RADIAL DYNAMIC [lbf] | 675 |
| RADIAL STATIC [lbf] | 1340 |
| THRUST DYNAMIC [lbf] | 1589 |
| THRUST STATIC [lbf] | 3859 |
| APPROX WEIGHT [lb] | 0.19 |
The KYB025 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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