K12020ARO Bore 120 Mm, 20mm SERIES, REALI-SLIM MM Metric Series Bearings
The K12020ARO 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 K12020ARO bearing is a Thin-section bearings with an inner diameter of 120 mm , an outer diameter of 160 mm, a width of 20 mm. It typically uses Precision Class 1 (ABEC 1F) standard grade precision tolerances and GCr15SiMn rings, GCr15SiMn rolling mlement. Its dynamic radial rated load is approximately 20357 N, its static radial rated load is approximately 36994.4 N. open type, together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.
K12020ARO bearings ( 120 mm x 160 mm x 20 mm) 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 | K12020ARO |
| Reference From | Kaydon K12020ARO |
| Manufacturer Part Code | K12020ARO |
| Series | 20mm SERIES |
| Separator | P = One-piece, snap-type, stamped brass or non-metallic composite cage |
| Thin section bearings type | REALI-SLIM MM Metric Series Bearings |
| Balls | Circular pocket separator 3/8" (inch) balls |
| Rolling bearing type | Angular contact ball bearing (type A) |
| Seal | open |
| Cage | Solid brass |
| Type | A = Angular contact |
| α Contact angle [°] | 30 ° |
| Unit of measurement | Metric |
| Precision | Precision Class 1 (ABEC 1F) standard |
| Ring | AISI 52100 steel |
| Contact type | Normal contact (two-point contact) |
| Races/Balls Material | K = AISI 52100 steel rings and balls, no seals (open) |
| Weight [lb] | 2 |
| d φ Inside [inch] | 4.724 |
| D Φ Outside [inch] | 6.299 |
| B Width [inch] | 0.787 |
| H Radial cross section [inch] | 0.787 |
| L1 Land Dia. [inch] | 5.315 |
| L2 Land Dia. [inch] | 5.709 |
| L3 Land Dia. [inch] | 5.905 |
| F chamfer [inch] | 0.059 |
| C0r Static Radial [kg] | 3775 |
| Cr Dynamic Radial [kg] | 2079 |
| C0a Static Axial [kg] | 10898 |
| Ca Dynamic Axial [kg] | 4715 |
The K12020ARO 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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