SA120ARO Bore 12 Inch, Imperial Open Type A, Angular Contact Ball Bearings
The SA120ARO 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 SA120ARO bearing is a Inch Open Type A Angular Contact Ball Bearings with an inner diameter of 12 inch , an outer diameter of 12.5 inch, a width of 0.25 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 1130 N, its static radial rated load is approximately 4290 N. Its dynamic axial rated load is approximately 13211 N, its static axial rated load is approximately 55111 N. Open (No seal) type, together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.
Interchange code: KAYDON KDY.KA120AR0, SILVERTHIN SA120AR0, SKF FPAA1200, FAG L15QA1200, NSK NBA30406, INA CSEA120, SSB RA120AR0, NTN KYA120
SA120ARO bearings ( 12 inch x 12.5 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 Robot joints, aerospace, semiconductor equipment, medical instruments and optoelectronic turntables.
| Part Number | SA120ARO |
| Bore | Cylindrical |
| Balls | standard 1/8" balls |
| Bearing Type | Inch Open Type A Angular Contact Ball Bearings |
| Cage | Brass; one piece pocket separator |
| Series | SA 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 | Open (No seal) |
| Units | Inch |
| Load | radial, axial, moment and combined loads |
| 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.KA120AR0 SILVERTHIN SA120AR0 SKF FPAA1200 FAG L15QA1200 NSK NBA30406 INA CSEA120 SSB RA120AR0 NTN KYA120 |
| Interchangeable | SILVER THIN SA120ARO |
| Rows NO. | One |
| L1 Land Diameter [inch] | 12.186 |
| L2 Land Diameter [inch] | 12.314 |
| L3 Land Diameter [inch] | 12.349 |
| Fillet radius (Note 2) max | 0.025" |
| RADIAL DYNAMIC [lbf] | 1130 |
| RADIAL STATIC [lbf] | 4290 |
| THRUST DYNAMIC [lbf] | 2969 |
| THRUST STATIC [lbf] | 12388 |
| APPROX WEIGHT [lb] | 0.56 |
The SA120ARO 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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