JDBS Spherical Plain Bearings for Solar-Tracker Actuator Linkages
A solar-tracker actuator linkage can change angle as the tracker moves, while its supporting brackets deflect under operating loads. This application page concerns a JDBS steel-outer-ring and graphite-plugged copper-alloy-inner-ring spherical bearing at a specified linkage eye.
Check articulation with the actual clevis and spacers
Provide the bearing width, inner-ring bore and the available angular movement inside the installed fork. Bolt heads, spacers and clevis faces may limit motion before the spherical sliding interface reaches its geometric limit. Show how the outer ring is retained and how the inner member is secured to the pin without clamping the moving assembly incorrectly.
Operating conditions and selection boundaries
Supply actuator push/pull forces at the relevant tracker angles, any design-defined wind or stow load, articulation frequency and dwell periods. State rain, dust, salt exposure and the proposed sealing or protective cover. The graphite plugs do not make the steel outer ring corrosion-proof.
This is a component enquiry subject to the tracker designer’s load cases. No wind-load, lifetime or corrosion-class certification is implied.
Specify the exact material standard, alloy or composite construction and any certificate requirements in the enquiry. Different national material designations are not treated as automatic equivalents. Availability and manufacturing details are confirmed in the quotation.
Dimensions and drawing information for quotation
| Drawing feature | Information to provide |
|---|---|
| Linkage load | Actuator force versus angle, load reversal and specified wind/stow cases. |
| Joint geometry | Pin diameter, bearing widths, eye fit, fork gap and spacers. |
| Articulation | Required angle in both planes and clearance through the full travel. |
| Outdoor requirements | Coating, seals, exposure, temperature and inspection access. |
Include quantity, units, drawing revision, inspection requirements and delivery destination. Distinguish measured wear from the intended new-part dimensions.
Installation and acceptance checks
Fit and retain each member using the specified seats and spacers. Verify articulation at both travel ends and in the designed stow position before applying service loads. Inspect protective surfaces and ensure any covers do not restrict movement or trap debris at the joint.
Confirm the lubrication and inspection plan for the specified material and duty. The application name does not establish a load rating, service-life guarantee or approval for the complete machine.
Frequently asked questions
Is this bearing weatherproof because it contains graphite?
No. The complete steel/copper-alloy assembly, protection and environment require review.
Is catalogue articulation the installed angle?
The clevis, spacers and surrounding hardware can impose a smaller usable angle.
Can an actuator’s rated force be used alone?
Provide the linkage geometry and design load cases, because bearing reactions change with tracker position.
Request a drawing-based quotation
Send the assembly section, component drawing, quantity and operating conditions for solar tracker actuator linkage spherical bearings. BONIU will review the geometry, material and installation requirements before confirming the quotation.