A "Sag rod" is a mechanical component that transmits force from one point to another in automatic and construction applications. Typically, a sag rod is a round or U-shaped bar utilized to secure and maintain the stationary position of mechanical components or structures, resisting the effects of compression, tension, or bending forces.

The primary functions of a sag rod are as follows:

1. Structural Support and Fixation: Sag rods are frequently employed to keep structural components or devices fixed, preventing them from moving or deforming during use.

2. Load-Bearing (Compression or Tension): Sag rods can bear compressive or tensile loads, counteracting the impact of compression or tension forces on the structure or equipment.

3. Mechanical Impact Resistance: Sag rods are commonly used in robotic applications, such as in suspension and steering systems of vehicles, to keep wheels and related components in a stable and steady position during operation.

4. Anchor Points: Sag rods often create anchor points or pivot points for attaching mechanical parts.

5. Balancing and Stability: Sometimes, sag rods may be used to balance and stabilize structures or equipment, particularly in construction applications.

6. Aesthetic Considerations: Sag rods can also be used for aesthetic purposes or to create focal points in mechanical or architectural design.

In summary, sag rods are a critical mechanical component for securing, fixing, and transmitting force in various applications, particularly in construction, industry, and mechanical engineering.