Universal Joint Oumefar 14mm ID Steel Rotatable Coupling with Keyway

Description

Product Overview

The Oumefar universal joint is engineered as a precision‑machined steel shaft coupling that bridges two misaligned shafts while preserving efficient torque transmission. With an inside diameter of 14 mm (0.55 in) and an outside diameter of 28 mm (1.1 in), the component measures approximately 70 mm (2.8 in) in length and weighs just 214 g (7.5 oz), making it compact enough for tight mechanical layouts yet robust enough for demanding power‑train applications. The coupling incorporates a keyway that locks securely into the shaft, preventing axial slip and ensuring that rotational forces are transferred directly from motor to driven element. Constructed from high‑hardness alloy steel, the joint resists wear, deformation, and corrosion, delivering a long service life even under continuous load cycles. The design features a pair of closely spaced hinges linked by a horizontal axis, allowing the downstream shaft to pivot up to several degrees while maintaining alignment, which is essential for hobby‑grade model vehicles, robotic arms, and other mechanisms where space constraints force shafts to intersect at non‑parallel angles.

The manufacturing process follows tight ISO 9001 quality standards, employing CNC milling and heat‑treatment cycles that achieve a surface hardness of 55 HRC. This hardness level provides a balance between rigidity and a degree of shock absorption, reducing the risk of sudden failure when the joint encounters transient overloads. The coupling’s smooth internal bore is finished to a tolerance of ±0.02 mm, guaranteeing a snug fit on standard 14 mm shafts without the need for additional keyway machining. The external geometry includes rounded edges and a polished finish that not only enhances aesthetic appeal but also minimizes stress concentrations that could lead to crack initiation. The included mounting screws, sized for metric M3 threads, simplify installation on a variety of chassis and frames, allowing users to secure the joint in seconds with a standard hex driver.

Usage

Designed for hobbyists and small‑scale engineers, the Oumefar universal joint excels in applications where shaft alignment cannot be guaranteed. Model car enthusiasts use it to connect motor shafts to drive wheels, enabling smooth power delivery even when the chassis geometry forces a slight angular offset. In model ship kits, the joint accommodates the tilt of propeller shafts caused by hull curvature, ensuring that the propulsion system operates without binding. Robotics builders appreciate the joint’s ability to transmit torque through articulated arms, where each segment may be positioned at a different angle to achieve complex motion paths.

Beyond hobby projects, the joint is suitable for prototype development in educational labs, where students experiment with gear trains and power transmission concepts. Its compact size allows it to be integrated into 3‑D‑printed enclosures, and the steel construction provides a realistic feel compared to plastic alternatives. The keyway feature simplifies the assembly process, as the shaft can be inserted and locked without additional fasteners, making it an ideal choice for rapid‑build scenarios and iterative testing environments.

Why Choose Us

Oumefar stands behind every component with a commitment to durability and precision. Our universal joint is produced in a dedicated facility that emphasizes strict dimensional control, ensuring that each piece meets the exact specifications required for high‑performance coupling. The alloy steel used is sourced from reputable suppliers and undergoes a controlled quenching and tempering process that yields consistent hardness across every batch, eliminating the variability that can plague generic off‑the‑shelf parts.

Customer support is a core pillar of our service model. Buyers receive a comprehensive technical guide that outlines installation steps, torque limits, and maintenance tips. Should any issue arise, our engineering team is available to provide troubleshooting assistance, and we offer a 90‑day warranty that covers material defects. This combination of engineered quality, transparent documentation, and responsive after‑sales service gives users confidence that the joint will perform reliably throughout the lifespan of their projects.

Key Features

• High‑hardness alloy steel construction resists wear and maintains torque under continuous load.
• 14 mm ID shaft coupling with precision‑machined keyway provides a secure, slip‑free connection.
• Rotatable hinge design accommodates angular misalignment up to several degrees without binding.
• Compact dimensions and lightweight profile fit into tight mechanical spaces while delivering strong performance.
• Includes mounting screws and detailed installation guide, backed by responsive technical support.

FAQ

What is the maximum torque this universal joint can handle?

The joint is rated for up to 12 Nm of continuous torque, which covers the needs of most hobby‑grade motor applications such as RC cars, small robots, and model ships.

Can the joint be used with shafts larger than 14 mm?

The standard model is designed for a 14 mm inner diameter. For larger shafts, Oumefar offers compatible sizes; however, using a larger shaft with this specific coupling may result in a loose fit and reduced torque transmission efficiency.

Is the keyway compatible with standard key sizes?

Yes, the keyway is sized for a standard 2 mm key, which is commonly supplied with the included mounting screws. This ensures a firm lock without the need for custom key fabrication.

How do I install the universal joint on my project?

First, align the shaft with the coupling’s inner bore, insert the shaft, and slide the key into the keyway. Then secure the joint to the mounting surface using the provided M3 screws, tightening them to the recommended torque of 0.8 Nm. A brief check for smooth rotation should be performed before final assembly.

What warranty does Oumefar provide?

Oumefar offers a 90‑day warranty covering any material or manufacturing defects. If a defect is identified within this period, we will replace the part at no additional cost.