As the demand for efficient and durable parts in industrial manufacturing continues to grow, Zinc Die Casting Fittings have become the preferred material in the automotive, electronics and construction fields due to their high precision, light weight and corrosion resistance. However, a key question is often mentioned by users: Do these fittings require additional lubrication during operation?

The natural advantage of zinc die-casting fittings: self-lubricating potential
Zinc alloys (such as the Zamak series) can form a dense and smooth surface structure after die-casting due to their unique metallic properties. Experiments have shown that the friction coefficient of zinc alloys (about 0.2-0.3) is lower than that of many traditional metal materials, which means that zinc die-cast fittings have a certain self-lubricating ability under low load and room temperature conditions. The 2022 report of the Fraunhofer Institute in Germany pointed out that trace elements such as aluminum and copper in zinc alloys can form an anti-wear layer at the microscopic level, further reducing friction losses.

When is it necessary to add lubricants?

Although zinc die-casting accessories have inherent advantages, active lubrication is still required in the following scenarios:
High-load dynamic systems: such as automotive transmission connectors or industrial robot arm joints, continuous pressure will cause the contact surface temperature to rise sharply, and lubricants can effectively dissipate heat and prevent metal adhesion and wear.
Corrosive environment: In coastal areas or chemical equipment, special greases can form a protective film on the zinc surface to block salt spray or chemical medium erosion.
Ultra-precision matching scenarios: Zinc die-cast guide rails in medical equipment or optical instruments, trace silicon-based lubricants can ensure nano-level motion accuracy.
Core principles for lubricant selection
Industry experts recommend the use of lubricating products that meet the following standards:

Compatibility: Avoid additives such as sulfur and chlorine that may cause intergranular corrosion
Temperature adaptability: Use synthetic greases with an operating temperature range of -20°C to 150°C
Environmental protection: Biodegradable lubricants that meet ISO 6743 standards are more popular in modern industry