Material and durability Precisionmachined brass construction for low friction, reliable strength, and long service life. Brass reduces wear and provides consistent performance under continuous use in 3D printers. Function and performance Connects three components with precision to minimize gaps and reduce inertial movement. torsional rigidity protects output parts and support bearings by compensating for large radial alignment errors. Reduces pressure and strain on the Zaxis caused by hot bed swing during printing, resulting in more stable and accurate prints. Compatibility and dimensions Outer diameter: 22 mm. Centertocenter distance between the two mounting holes: 16 mm. Designed for use with T8 screw Z axes and screw nuts that have a 16 mm mounting hole spacing. Verify your screwnut mounting hole spacing before to ensure compatibility. Why you need it Improves Zaxis stability and print quality by reducing wobble and unwanted movement. Protects bearings and other drivetrain components from misalignmentrelated damage. Provides a durable upgrade or replacement part for printers using a T8 Z screw with 16 mm hole spacing. Typical applications 1. Upgrade or the Zaxis coupling on a T8screw 3D printer to reduce layer shift and improve vertical accuracy during long prints. 2. Install when switching to a heavier or larger hot bed to lower pressure spikes and stabilize the Zaxis motion. 3. Use as a durable replacement in printers that experience premature bearing wear or vibration due to radial misalignment. Note: Confirm the 16 mm mounting hole spacing on your screw nut and T8 Zaxis configuration before ordering.