Metal Three-Section Universal Joint Coupling M3/M4 Motor Connector

Metal Three-Section Universal Joint Coupling for Motors, Vehicles & Ships

Upgrade your mechanical builds with this precision-engineered three-section universal joint coupling from KANDE BEARINGS. Constructed from durable steel, this universal joint connector is designed for smooth, flexible torque transmission across motor shafts, RC vehicles, model ships, and a wide range of mechanical applications. Its three-section design allows angular misalignment compensation, making it ideal for setups where shafts are not perfectly aligned.

Key Features

• Three-Section Universal Design: Provides flexible angular movement for smooth shaft coupling and torque transfer even with slight misalignment.
• Durable Steel Construction: Built to withstand mechanical stress, vibration, and continuous rotation in demanding environments.
• M3 & M4 Screw Compatibility: Available in 4-4 configuration (M3 machine screws) and 5-5 configuration (M4 machine screws) to fit a wide variety of motor shaft diameters.
• Versatile Applications: Suitable for RC cars, boats, ships, motors, DIY mechanical projects, robotics, and industrial coupling needs.
• Precise Engineering: Machined for tight tolerances to ensure minimal play, stable connection, and consistent performance.

Specifications

• Brand: KANDE BEARINGS
• Material: Steel
• Structure: Universal (Three-Section)
• Screw Compatibility: M3 (4-4 joint) / M4 (5-5 joint)
• Applications: Motor connectors, vehicle and ship shaft coupling, robotics, DIY builds
• Country of Origin: Made in China

Applications

This universal joint connector is perfect for hobbyists, engineers, and DIY builders who need reliable shaft coupling in tight or angled spaces. Use it in RC model vehicles, marine drive systems, motorized mechanisms, or any project requiring a flexible, durable shaft-to-shaft connection.

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Frequently Asked Questions

Q: What is a three-section universal joint coupling and how does it work?

A: A three-section universal joint coupling connects two motor shafts while allowing angular misalignment between them. The three-section design includes two yoke ends and a cross-joint center, enabling torque to be transmitted smoothly even when the shafts are not perfectly in line — ideal for RC vehicles, ships, and motorized mechanical systems.

Q: What shaft sizes does this universal joint fit?

A: This universal joint coupling comes in two configurations: the 4-4 three-way joint is designed for use with M3 machine screws, while the 5-5 three-way joint is designed for M4 machine screws. Please select the appropriate size based on your motor shaft diameter and screw requirements.

Q: Is this universal joint coupling suitable for RC boats and ships?

A: Yes! This steel universal joint connector is specifically designed for vehicle and ship coupling applications. Its flexible angular compensation makes it well-suited for RC boats, model ships, and similar marine drive systems where slight shaft misalignment is common.

Q: What material is this universal joint made from?

A: The universal joint coupling is made from steel, offering excellent durability, resistance to mechanical stress, and reliable long-term performance in both hobby and light industrial applications.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.