Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
When a loose or misaligned joint causes vibration, binding, or premature wear in your build, the root cause is often a substandard rod end. Engineers, robotics builders, and CNC fabricators who need reliable angular articulation in tight spaces rely on M4 male thread rod end bearings to deliver consistent, low-friction pivot performance across demanding duty cycles.
These M4 rod end bearings feature a steel outer body with an M4 male threaded shank (4 mm nominal bore), available in right-hand (SA4TK) and left-hand (SAL4T/K) thread configurations. The spherical inner race allows angular misalignment compensation of typically ±10–15°, accommodating shaft deflection without binding. Overall body length is typically 30–40 mm; thread engagement length is typically 10–15 mm.
Typical use cases include push-pull control linkages on RC aircraft and drones, steering tie-rod assemblies on small vehicles and go-karts, and linear actuator end connections on CNC router Z-axis carriages — all applications where a compact M4 rose joint bearing must handle both radial load and angular misalignment simultaneously.
Available in right-hand (SA4TK) and left-hand (SAL4T/K) variants, enabling turnbuckle-style length adjustment when paired together on a single linkage rod.
The spherical inner race accommodates angular misalignment of typically ±10–15°, preventing binding and reducing stress on connected shafts and frames.
4 mm nominal thread diameter with standard M4 pitch for direct installation into threaded rods, clevis brackets, and adjuster tubes — no special tooling required.
Steel body and race provide structural rigidity for radial and axial loads; surface treatment helps resist oxidation in typical indoor and light outdoor environments.
Order in packs of 1, 5, 10, 15, or 20 pieces to match your project scale — from single prototype builds to small-batch production runs.
Designed for space-constrained linkage points where a full-size rod end would interfere with adjacent components, making these ideal for robotics joints and CNC carriage mounts.
| Thread Size | M4 (4 mm) |
|---|---|
| Thread Type | Male |
| Thread Direction | Right-hand (SA4TK) / Left-hand (SAL4T/K) |
| Bore Diameter | 4 mm (0.157 in) |
| Body Material | Steel |
| Angular Misalignment | Typically ±10–15° |
| Overall Body Length | Typically 30–40 mm (1.18–1.57 in) |
| Thread Engagement Length | Typically 10–15 mm (0.39–0.59 in) |
| Surface Finish | See variant options |
| Load Rating | See variant options |
| Available Quantities | 1 / 5 / 10 / 15 / 20 pcs |
If your linkage rod has a standard right-hand thread on both ends, select SA4TK for both rod ends. If you need turnbuckle-style length adjustment — where rotating the central tube lengthens or shortens the assembly — pair one SA4TK (right-hand) with one SAL4T/K (left-hand) on opposite ends of the same rod.
The spherical inner race typically accommodates ±10–15° of angular misalignment. Operating consistently at the upper limit of this range will accelerate wear; for high-cycle or high-load applications, keep misalignment below 10° where possible.
The steel construction with surface treatment provides resistance to light moisture and humidity typical of indoor workshops and sheltered outdoor use. For prolonged exposure to rain, salt spray, or immersion, consider applying a compatible grease or selecting stainless-steel rod ends for your application.
At M4 size, these bearings are suited for light-duty linkage loads typical of robotics joints, RC control surfaces, and small CNC carriages. Specific dynamic and static load ratings depend on the exact variant; contact us to confirm load capacity for your application before ordering.
Yes. The M4 male shank threads directly onto standard M4 female-threaded rods, adjuster tubes, and clevis brackets with standard M4 pitch. Always verify the thread pitch and direction (right or left hand) of your mating component before installation.
A single push-pull linkage requires two rod ends (one per end). For a full 3-axis CNC router with multiple carriages, packs of 10 or 20 are more economical. The 5-pack is popular for small robot arm builds with 2–3 articulated joints. Select the quantity that matches your build count above.
Yes. Pair one SA4TK (right-hand thread) and one SAL4T/K (left-hand thread) on opposite ends of a central threaded tube. Rotating the tube will simultaneously thread both rod ends in or out, adjusting the overall linkage length without disassembly — a standard turnbuckle configuration used in aircraft control systems and suspension linkages.
