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When a steering linkage starts to bind, a control rod develops slop, or a suspension joint wears out prematurely, the root cause is often a bearing that wasn't built for the environment. Fabricators, machine builders, and DIY mechanics who work with exposed or high-cycle assemblies need stainless steel rod end bearings that resist corrosion without sacrificing load capacity.
These stainless steel fish-eye rod end spherical plain joint bearings are available in SI (standard, right-hand thread) and SIL (reverse, left-hand thread) configurations, covering bore sizes from 6 mm (~0.24 in) up to 35 mm (~1.38 in). The spherical plain inner ring allows angular misalignment, while the stainless steel construction provides corrosion resistance across the full size range.
Typical applications include automotive tie-rod and steering linkages, industrial push-pull control rods, agricultural equipment pivot joints, and custom fabrication projects where a threaded rod end with angular articulation is required. The availability of both right-hand and left-hand thread variants makes these bearings well-suited for turnbuckle-style assemblies and length-adjustable linkages.
| Type | Spherical Plain Rod End Bearing (Fish-Eye) |
|---|---|
| Series | SI (Right Hand) / SIL (Left Hand) |
| Size Range | 6 to 35 (metric bore, mm) |
| Bore Diameter Range | Typically 6–35 mm (0.24–1.38 in) — see variant options |
| Thread Type | Right Hand (SI) / Left Hand (SIL) |
| Material | Stainless Steel |
| Inner Ring Design | Spherical Plain (angular misalignment capable) |
| Thread Standard | Metric SI/SIL |
| Weight | See variant options |
| Finish | See variant options |
SI rod ends have a standard right-hand thread, meaning the shank tightens clockwise. SIL rod ends have a reverse left-hand thread, tightening counter-clockwise. Using one SI and one SIL on opposite ends of a connecting rod creates a turnbuckle effect, allowing you to adjust the overall length by rotating the rod without removing either end.
Match the size number to the nominal bore diameter in millimetres — for example, SI 10 T/K has a bore of approximately 10 mm. You should also verify the thread pitch and shank diameter against your connecting rod or clevis. If you are replacing an existing bearing, measure the bore, shank thread, and overall body width to confirm compatibility before ordering.
Yes. The stainless steel construction provides meaningful corrosion resistance compared to standard carbon-steel rod ends, making these bearings a practical choice for outdoor machinery, marine-adjacent applications, and environments where moisture or mild chemical exposure is expected. For highly aggressive chemical environments, contact us to confirm suitability.
In the SI/SIL rod end naming convention, "T/K" refers to the thread and shank specification associated with that size. It indicates the bearing is supplied with the standard threaded shank for that size class, as opposed to a plain (unthreaded) bore version. All variants listed here include the threaded shank.
Spherical plain rod end bearings are designed to handle both static and moderate dynamic loads with angular misalignment. For high-cycle or heavy dynamic applications, the specific load rating (radial and axial) for your chosen size should be verified against your application requirements. Contact us to confirm if you need load rating data for a specific size.
Maintenance requirements depend on the specific inner ring and race surface finish of the bearing. Many spherical plain bearings in this class are supplied with a maintenance-free or low-maintenance liner, but for extended service life under load, periodic inspection is recommended. Contact us to confirm the lubrication specification for your chosen size.
Yes — this is a common and intentional configuration. Pairing an SI (right-hand) rod end on one end with an SIL (left-hand) rod end on the other end of a threaded rod allows the overall length of the assembly to be adjusted by rotating the central rod, without needing to remove either bearing. This is the standard approach for adjustable tie rods and control linkages.
