SB042ARO Bore 4.25 Inch, Imperial Open Type A, Angular Contact Ball Bearings
The SB042ARO 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 SB042ARO bearing is a Inch Open Type A Angular Contact Ball Bearings with an inner diameter of 4.25 inch , an outer diameter of 4.875 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 890 N, its static radial rated load is approximately 2150 N. Its dynamic axial rated load is approximately 9652 N, its static axial rated load is approximately 27578 N. Open (No seal) type, together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.
Interchange code: KAYDON KDY.KB042AR0, SILVERTHIN SB042AR0, SKF FPAB404, FAG L15RA404, NSK NBA10707, INA CSEB042, SSB RB042AR0, NTN KYB042
SB042ARO bearings ( 4.25 inch x 4.875 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 | SB042ARO |
| Bore | Cylindrical |
| Balls | standard 5/32" balls |
| Bearing Type | Inch Open Type A Angular Contact Ball Bearings |
| Cage | Brass; one piece pocket separator |
| Series | SB SERIES 5/16" X 5/16" |
| 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.KB042AR0 SILVERTHIN SB042AR0 SKF FPAB404 FAG L15RA404 NSK NBA10707 INA CSEB042 SSB RB042AR0 NTN KYB042 |
| Interchangeable | SILVER THIN SB042ARO |
| Rows NO. | One |
| L1 Land Diameter [inch] | 4.481 |
| L2 Land Diameter [inch] | 4.643 |
| L3 Land Diameter [inch] | 4.71 |
| Fillet radius (Note 2) max | 0.040" |
| RADIAL DYNAMIC [lbf] | 890 |
| RADIAL STATIC [lbf] | 2150 |
| THRUST DYNAMIC [lbf] | 2169 |
| THRUST STATIC [lbf] | 6199 |
| APPROX WEIGHT [lb] | 0.31 |
The SB042ARO 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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