The KA020XP0 thin section bearing reference identifies an open four-point contact design with a 2-inch bore. LYDL lists this nominal size as LYDL-A020 Type X, measuring 2 × 2.5 × 0.25 in (50.8 × 63.5 × 6.35 mm). Use the dimensional envelope to compare your installation, and send the model, quantity and application to request a quotation.
KA020XP0 belongs to Kaydon’s reference naming system. The product offered here is identified with the LYDL brand; reference names describe comparison targets and do not imply an authorized brand relationship. Include “LYDL-A020, open Type X, KA020XP0 reference” because a LYDL shorthand can also occur in other contact-type series.
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| Parameter | Symbol | Inches | Millimeters |
|---|---|---|---|
| Bore diameter | d | 2 | 50.8 |
| Outside diameter | D | 2.5 | 63.5 |
| Axial width | B | 0.25 | 6.35 |
| Radial section, (D − d) / 2 | — | 0.25 | 6.35 |
Inches are the original nominal units; conversion uses exactly 25.4 mm per inch. The values describe the bearing envelope, not shaft fits, housing tolerances or a complete installed assembly. LYDL’s open Type X series table provides the broader size range.
This is the smallest KA bore in this publication batch. Its 50.8 mm bore and 63.5 mm outside diameter define a compact ring envelope, but the section is still the KA quarter-inch size. A 50 mm shaft is not the nominal matching bore. If a redesign needs a 2.5-inch opening, KA025XP0 requires changes to both shaft and housing; it is not a stock substitution.
The reference ratings below follow the Kaydon Reali-Slim open Type X catalog entry for the equivalent KA020XP0 designation. Use them for first-pass sizing; confirm final selection with LYDL against the actual duty cycle, fits, lubrication and operating temperature of your mechanism.
| Parameter | Symbol | Reference value | SI equivalent |
|---|---|---|---|
| Dynamic radial load rating | Cr | 514 lbf | 2.3 kN |
| Static radial load rating | C0r | 680 lbf | 3.0 kN |
| Dynamic thrust load rating | Ca | 790 lbf | 3.5 kN |
| Static thrust load rating | C0a | 1,710 lbf | 7.6 kN |
| Dynamic moment rating | M | 434 in-lbf | 49 N·m |
| Static moment rating | M0 | 770 in-lbf | 87 N·m |
| Approximate mass | m | 0.1 lb | 0.045 kg |
Reference values per the Kaydon Reali-Slim catalog for the equivalent open Type X part number. LYDL manufactures to its own internal specifications, so treat these figures as comparison inputs rather than guaranteed ratings, and verify critical selections with our engineering team.
Type X uses four-point contact geometry and is considered for reversing axial loading and moment support. Combined-load suitability depends on how forces act together, the bearing configuration and the surrounding support. A thin ring with the right bore is not sufficient evidence that it will support a proposed overturning moment or meet a motion-accuracy target.
The KA reference family retains its 0.25 × 0.25 in section as bore size changes. The X contact type must remain explicit in an inquiry: an angular-contact or radial-contact bearing of similar size changes the load arrangement. Compare the Type A angular-contact series or Type C radial-contact series when the duty calls for a different contact design.
| Brand | Reference designation | Comparison scope |
|---|---|---|
| LYDL | LYDL-A020 · open Type X | Specify the full reference and agreed supply drawing |
| Kaydon | KA020XP0 | Official open Type X nominal size |
| Silverthin | SA020XP0 | Official open Type X nominal size |
| INA / Schaeffler | CSXA020 | Schaeffler CSX catalog: same nominal envelope and four-point contact family |
The table compares the nominal 2 × 2.5 × 0.25 in envelope and four-point contact category. Silverthin uses the SA family prefix for this section, whereas the Kaydon designation uses KA. INA / Schaeffler uses the CSXA family designation in this comparison; CSXA020 is the listed reference for this size. The CSX naming identifies the four-point contact family. Keep each brand with its full code and confirm its current specification and availability.
These references are starting points for an interchange review, not an unconditional replacement statement. Check ring geometry, shoulders and corner clearance, fits, internal clearance or preload, accuracy, lubricant and operating duty. Published ratings from different brands are not transferred into LYDL supply data. The suffix does not establish LYDL precision, cage material or preload.
You can request a price for the KA020XP0 reference before every installation detail is settled. Include quantity and delivery destination first. For a replacement assessment, add the existing drawing or designation and identify which dimensions cannot change; this helps distinguish a bore-size change from a section-size change.
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The 50.8 mm nominal opening and 6.35 mm section suit small robotic arm joints, medical imaging and scanner positioning stages, optical gimbals and sensor-head rotators, encoder mounts, and table-top rotation stages where envelope, mass and rotor inertia dominate the design. These are potential engineering contexts, not verified installations of this LYDL model. Bearing choice must still account for the actual force directions, motion profile and supporting structure.
For oscillating motion, describe the travel angle, reversal frequency and dwell periods as well as speed. For continuous rotation, specify duty cycle, temperature, lubricant and external protection. These operating details help distinguish a dimensional candidate from a bearing configuration suitable for the actual mechanism.
| Reference model | Bore d (in) | Outside D (in) | Width B (in) |
|---|---|---|---|
| KA020XP0 | 2 | 2.5 | 0.25 |
| KA025XP0 | 2.5 | 3 | 0.25 |
| KA030XP0 | 3 | 3.5 | 0.25 |
| KA035XP0 | 3.5 | 4 | 0.25 |
All listed rows are open Type X references. A shared bore can preserve the nominal shaft diameter while changing the housing bore and axial stack. A shared section preserves bearing width while the shaft and housing diameters change together. The table makes no ranking of load capacity, stiffness, torque or service life.
Compare published model pages: KA025XP0 dimensions · KA030XP0 dimensions · KA035XP0 dimensions.
Browse the open four-point contact bearing category for this product family.
Allow for more than the 6.35 mm nominal bearing width when reviewing the axial stack. Shaft shoulders, retainers, covers and external seals occupy additional space. Check shaft and housing roundness and support continuity, and apply mounting force through the appropriate ring rather than through the rolling elements. An approved drawing should define the actual interfaces.
Agree material, cage, clearance or preload, accuracy and lubrication as part of the supply specification. Request the inspection items that matter to your assembly, such as dimensional verification and agreed running checks. No numerical load, speed, runout, torque or life guarantee is inferred solely from the reference code or from another brand’s catalog.
Discuss corrosion protection, moisture control, separation between rings and restraint against movement or distortion during transport. Packing should support the thin ring without concentrated clamping. The final package and any inspection records belong to the agreed order; the illustration below is not a photograph of your batch or evidence of a particular test facility.
The reference has a 2 in bore, equivalent to 50.8 mm; 020 does not mean a 20 mm bore. Its complete envelope is 50.8 × 63.5 × 6.35 mm. A request that contains only “020 bearing” leaves the contact type and reference family unresolved.
Compare the complete envelope. KA020XP0 is 2 × 2.5 × 0.25 in, while KA025XP0 is 2.5 × 3 × 0.25 in. The section agrees, but the bore and outside diameter differ, so it is not a direct replacement in the same shaft and housing.
For KA020XP0, both are nominally 0.25 in (6.35 mm), but they are different measurements. Width is measured along the axis; radial section is half the difference between outside and bore diameters. Neither figure includes the housing wall, retaining parts or external protection.
Use LYDL-A020 with “open Type X” and the full KA020XP0 reference. Include any existing drawing or special configuration. The shorter LYDL designation alone does not resolve contact type, preload, clearance, material or accuracy, and the brand comparison table is not a declaration of fully interchangeable performance.
Open identifies a bearing without an integral sealing arrangement in this reference category. It does not establish preload, clearance or lubricant. External contamination protection and the internal setting should be chosen for the actual duty and stated in the agreed supply specification.
Send “LYDL-A020, open Type X, KA020XP0 reference,” quantity, application and destination for a quotation. If the bearing must fit an existing assembly, include the drawing or the interfaces that must remain fixed. You can also request a drawing for review before agreeing the supply configuration.
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Brand names and catalog designations remain the property of their respective owners. References support dimensions, structure and nomenclature; they do not certify a LYDL configuration or guarantee current availability from the reference manufacturer.
