KYF040 Bore 4 Inch, Imperial Open Type A, Angular Contact Ball Bearings
The KYF040 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 KYF040 bearing is a Inch Open Type A Angular Contact Ball Bearings with an inner diameter of 4 inch , an outer diameter of 5.5 inch, a width of 0.75 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 3735 N, its static radial rated load is approximately 6350 N. Its dynamic axial rated load is approximately 37452 N, its static axial rated load is approximately 81576 N. Open (No seal) type, together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.
Interchange code: KAYDON KDN.KF040AR0, SILVERTHIN SF040AR0, SKF FPAF400, FAG L15VA400, NSK NBA10119, INA CSEF040, SSB RF040AR0, NTN KYF040
KYF040 bearings ( 4 inch x 5.5 inch x 0.75 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 | KYF040 |
| Bearing Type | Inch Open Type A Angular Contact Ball Bearings |
| Equivalent | KAYDON KDN.KF040AR0 SILVERTHIN SF040AR0 SKF FPAF400 FAG L15VA400 NSK NBA10119 INA CSEF040 SSB RF040AR0 NTN KYF040 |
| Interchangeable | NTN KYF040 |
| Cage | Brass; one piece pocket separator |
| Series | KYF SERIES 3/4" X 3/4" |
| Balls | standard 3/8" 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] | 4 |
| D Φ Outside [inch] | 5.5 |
| Width [inch] | 0.75 |
| L1 [inch] | 4.555 |
| L2 [inch] | 4.945 |
| L3 [inch] | 5.115 |
| (Note 2) max | 0.080" |
| RADIAL DYNAMIC [lbf] | 3735 |
| RADIAL STATIC [lbf] | 6350 |
| THRUST DYNAMIC [lbf] | 8419 |
| THRUST STATIC [lbf] | 18338 |
| APPROX WEIGHT [lb] | 1.9 |
The KYF040 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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