SI4T/K M4 Female Threaded Rod End Joint Bearing 4mm

The SI4T/K M4 Female Threaded Rod End Joint Bearing (also known as a fisheye joint connector) is a high-precision mechanical component designed to facilitate smooth, multi-directional rotational movement. Featuring an M4 internal thread and a 4mm inner bore, this self-lubricating rod end joint is engineered to handle radial and axial loads while compensating for misalignment in dynamic linkages. It is a critical component for reducing friction and ensuring precise motion transfer in mechanical assemblies.

This M4 fisheye joint is widely used in Delta-style 3D printers (such as Kossel builds), CNC machines, RC models, DIY robotics, and custom steering linkages. It is fully compatible with standard M4 threaded rods, carbon fiber tubes, and linear motion systems, making it a favorite among Indian makers, students, and hardware engineers looking to build robust parallel kinematics systems.

Features:

• High-Quality Construction: Built with a durable carbon steel body and a hard chrome-plated steel ball for superior wear resistance.
• Self-Lubricating Design: Features a bronze/brass race insert that ensures smooth operation and minimizes maintenance requirements.
• Precise M4 Internal Thread: Standard SI4T/K metric M4 female thread for secure and easy mounting onto threaded rods.
• 4mm Inner Bore: Precision-ground 4.0mm inner diameter ball swivel allows for high-angle flexibility and rotation.
• Compact & Lightweight: Weighing only 10.7 grams, it is ideal for weight-sensitive applications like 3D printer effector arms.
• Corrosion Resistant: Zinc-plated body finish protects against rust and environmental degradation in demanding workshop conditions.

Package Includes:

1 x SI4T/K M4 Female Threaded Rod End Joint Bearing