Gator RC 2.8mm Ball Bearing Link Adjusters – 4 Pack
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Gator RC 2.8mm Ball Bearing Link Adjusters (4-Pack)
Create smooth, precise control linkages for RC airplanes with these Gator RC 2.8mm Ball Bearing Link Adjusters. Each adjuster incorporates a compact radial ball bearing at the control-arm connection, allowing the linkage to pivot freely while maintaining accurate control surface tracking under continuous flight loads.
The solid unthreaded link shank is designed to be custom drilled and tapped to accept common 4-40 or M3 threaded pushrods and turnbuckles on your workbench. These premium metal links are an excellent choice for aileron, elevator, and rudder linkages, pairing cleanly with high-performance hardware including Secraft Aluminum Servo Arms.
⚠ Critical Mechanical Installation Requirements:
- Bearing Orientation: When using these adjusters, the bearings must face the top.
- Screw Placement: The head of the 2mm (M2) screw goes directly up against the center inner ring of the bearing.
- Plastic Spacer Sandwich: You must place a small plastic washer or spacer sandwiched directly between the bearing face and the servo arm. This is very important to allow the outer bearing race to spin cleanly without binding against the flat arm metal.
🚀 Target Applications:
- High-load, heavy-duty main control surface linkages demanding zero-play geometry
- Precision sport planes, IMAC competition aerobatic models, and large-scale aircraft
- Any advanced layout where traditional composite ball links are replaced with rigid, ball-bearing pivots
Key Features
- Ball-Bearing Pivot Hub: Integrated 2.8mm micro ball bearing allows the linkage to pivot smoothly without introducing side-load friction onto your servo towers.
- Rigid Custom Threading: Oversized 5.37mm solid metal shank provides plenty of wall material to cut deep, clean 4-40 or metric M3 threads.
- Zero-Slop Tracking: Mechanical ball bearing race eliminates loose linkage play, improving servo centering and giving you crisp, repeatable control surface positioning.
- Compact Outer Geometry: Streamlined footprint drops cleanly into standard fiberglass control horn slots or multi-servo linkage trays without clearance binding.
- Four-Adjuster Value Bundle: Shipped as a complete 4-pack to fully outfit an entire dual-aileron wing assembly or a multi-point tail layout from a single package.
📋 Technical Specifications
| Product Type: | RC Aircraft Control Linkage Ball-Bearing End Adjuster |
| Bearing Inner Hole: | 2.8 mm (0.110 in) — Sized for standard fasteners |
| Link Shank Diameter (OD): | Approximately 5.37 mm (0.211 in) |
| Compatible Threads: | 4-40 or M3 threads (Must be custom drilled and tapped) |
| Hardware Mounting Pin: | Accepts standard M2 (2mm) mounting screws |
| Retail Package Quantity: | 4 Ball-Bearing Link Adjusters per retail package |
*Please note: This package contains the four adjusters only. Mounting screws, washers, spacers, pushrods, turnbuckles, servo arms, and tools are not included and are sold separately.
📦 Package Includes:
- 4 × 2.8 mm Ball-Bearing Link Adjusters
💡 Workbench Sizing Guide
- To thread the link shank, clamp it securely in a bench vise using soft jaws. Carefully drill out the core using a #43 bit for 4-40 threads, or a 2.5mm bit for M3 threads, then run your tap slowly into the hole.
- Check full servo travel on your workbench, and verify that the bearing links do not hit mechanical over-travel limits or strike adjacent control bay formers.
The Gator RC Advantage: We stock genuine Gator RC products along with compatible wheels, high-strength aluminum axles, custom landing gear tracks, and installation accessories to help complete your project. Orders ship quickly from our Illinois warehouse.