M2 Servo Linkage Rod 85mm Stainless Steel Double-Ended Threaded Push Rod

Specifications:

• Rod Type: Double-Ended Threaded Push Rod
  
• Total Length: 85mm
  
• Thread Standard: M2 (Standard Metric 2mm)
  
• Material: Stainless Steel
  
• Thread Coverage: Approx. 10mm-15mm on each end
• Stiffness: High (Resistant to buckling under servo compression)
  
• Compatibility: Fits standard M2 Clevises, Ball Links, and Servo Horn connectors.

Key Applications & Projects:

• RC Aeromodeling: Critical for connecting servos to ailerons, elevators, and rudders where failure means a crash.
  
• Steering Mechanisms: Ideal for RC cars and rovers to connect the steering servo to the wheel knuckles.
  
• Robotic Arms: Acts as a rigid tendon for animatronics or gripper mechanisms where precise push/pull action is required.
  
• Custom 3D Printed Mechanisms: Provides a standardized, wear-resistant interface for custom-printed gears and levers.

Project Evolution:

• Before This (The Prerequisite): You might be used to mounting wheels or arms directly onto the servo spline (Direct Drive). While simple, this limits your mechanical advantage and range of motion.
  
• With This Upgrade: This linkage rod unlocks 4-Bar Linkage mechanisms. You can now separate your servo from the moving part. This allows you to place the servo in a safe, balanced location inside the chassis while transferring motion to a remote flap, leg, or wheel.
  
• Effort Level: Intermediate. Requires understanding of mechanical geometry. You will need M2 Clevises or Ball Links to complete the joint.

Required Accessories

• M2 Clevis / Ball Links: To connect the rod ends to horns.
  
• M2 Nuts: For locking the position.
  
• Servo Horns: To drive the rod.

Package Includes:

1 X M2 Servo Linkage Rod 85mm Stainless Steel Double-Ended Threaded Push Rod

Frequently Asked Questions (FAQ)

1. What is the exact thread pitch?
   It is a standard coarse M2 thread (0.4mm pitch), compatible with all standard M2 nuts and accessories.
   
2. Can I bend this rod to shape?
   Yes, but it requires significant force due to the stainless steel material. Use two pairs of pliers to make precise Z-bends if not using clevises.
   
3. Does this come with ball links?
   No, this is the rod only. Ball links or clevises must be purchased separately.
   
4. Is the entire length threaded?
   No, only the ends are threaded (typically 10-15mm). The center section is smooth for structural rigidity.
   
5. Will this rust outdoors?
   Being stainless steel, it is highly resistant to rust and corrosion, making it suitable for outdoor rovers and boats.
   
6. What is the diameter of the smooth part?
   The smooth shaft diameter is approximately 1.8mm - 2.0mm (nominal M2 rod stock).
   
7. Can I solder to this rod?
   Stainless steel is difficult to solder with standard electronics flux. You would need acidic flux, but mechanical connections (nuts/threads) are recommended.
   
8. How much weight can it push without bending?
   For a 85mm length, it can easily handle the stall torque of standard metal gear servos (10kg-cm range) without buckling.
   
9. Can I use this with MG996R servos?
   Yes, this is an excellent match for MG996R or MG90S metal gear servos.
   
10. Is this compatible with nylon clevises?
    Yes, as long as the clevis is rated for M2 threads.
    
11. How do I adjust the length accurately?
    Install ball links on both ends. Rotate the rod itself (like a turnbuckle) to push the links further apart or pull them closer.
    
12. What tool do I need to tighten this?
    Use small pliers to grip the smooth center section while tightening jam nuts.
    
13. Can I cut the threaded part off?
    If you cut the threaded part, you lose the ability to screw on attachments. Only cut if you have excess thread length.
    
14. Is this magnetic?
    Some stainless steel alloys (like 304) can be slightly magnetic due to cold working during manufacturing, but less so than mild steel.
    
15. What is the weight of a single rod?
    Approximately 2 to 3 grams.
    
16. Can I use this for a 3D printer Z-axis?
    No, this is a linkage rod, not a lead screw. It is not precise enough for linear motion drive, only for push-pull linkages.
    
17. Does it fit into standard servo horn holes?
    The threaded part will not rotate freely in a servo horn hole. You must use a "Z-bend" wire or a clevis/ball-link adapter.
    
18. What if I need a longer rod?
    We stock various lengths. Do not try to weld two together; it will ruin the temper.
    
19. Can I use M2.5 nuts on this?
    No, M2.5 is too large and will slip over the threads. You must use M2 hardware.
    
20. Is this suitable for high-speed robotics?
    Yes, the stiffness ensures immediate response without the "lag" caused by flexible plastic linkages.