Purpose and Placement in Valve Assemblies
The Festo VAME-XA-Z-12 tie rod (manufacturer ID 8191753) is a mechanical fastener engineered for pneumatic valve stacks and similar modular assemblies. Its primary role is to clamp valve components together securely, maintaining alignment and preventing loosening under vibration or thermal cycling. With a length of 12 mm and a nominal tightening torque of 1.4 Nm, it is suited for compact valve manifolds where space is limited but joint integrity is critical. The tie rod is supplied in packs of three, allowing for consistent replacement or assembly of multiple mounting points.
Material and Environmental Resistance
Constructed from high-alloy stainless steel, the VAME-XA-Z-12 offers robust corrosion resistance, rated as corrosion resistance class (CRC) 2, which corresponds to moderate corrosion stress. This makes it appropriate for environments with occasional exposure to moisture or mild industrial atmospheres, such as packaging lines or material handling equipment. The material choice also ensures dimensional stability over time, reducing the risk of thread galling or seizing—a common issue with lower-grade fasteners in demanding applications.
Additionally, the tie rod is RoHS-compliant, confirming the absence of restricted hazardous substances. This is an important consideration for manufacturers targeting global markets or operating under strict environmental regulations.
Standards and Cleanliness Compliance
For industries that require strict control of paint-wetting impairment substances (PWIS), the VAME-XA-Z-12 meets LABS (PWIS) conformity per VDMA24364-B1/B2-L. This standard ensures that the component does not release silicone or other contaminants that could compromise paint adhesion or surface quality in downstream processes. As a result, this tie rod is suitable for use in automotive paint shops, electronics assembly, or any application where cleanliness is paramount. The conformity is verified through testing, giving engineers confidence in the component's compatibility with sensitive production environments.
Mounting and Torque Specifications
The tie rod features a dual-thread design: an external M4 thread and an internal M4 thread, with an internal hexagon (AF 4) for installation. This configuration allows flexible mounting options—either as a stud or as a connector between components. The nominal tightening torque of 1.4 Nm, with a tolerance of ±15%, provides a clear guideline for achieving proper preload without over-stressing the threads. This precision is essential for maintaining consistent clamping force across multiple tie rods in a manifold, which directly impacts sealing performance and overall system reliability.
Weighing only 7.8 g per piece, the tie rod adds negligible mass to the assembly, making it ideal for weight-sensitive applications such as robotic end-of-arm tooling or mobile equipment.
Integration and Procurement Considerations
When integrating the VAME-XA-Z-12 into a valve system, engineers should verify thread compatibility with the valve end plates and mounting brackets. The M4 threads are common in Festo's modular valve range, but cross-checking with the specific valve model is recommended. For procurement teams, the pack size of three simplifies inventory management and reduces waste, while the standardized torque specification ensures consistent assembly procedures across shifts. The combination of stainless steel construction, LABS conformity, and RoHS compliance makes this tie rod a dependable choice for OEMs and maintenance teams seeking a long-life, low-maintenance fastening solution.