The Polycentric Mechanical Knee Joint Aluminum is a lightweight prosthetic knee joint designed to provide stable, controlled, and reliable knee movement for lower limb prostheses. Manufactured using an aerospace-grade aluminium mainframe, it combines strength with reduced weight, making it suitable for everyday prosthetic use.

Designed for durability and smooth performance, this knee joint incorporates advanced engineering features that help improve movement, reduce friction, and support long-term reliability.

Key Benefits

• Lightweight aerospace-grade aluminium construction
• Stable and controlled polycentric knee movement
• Soft-close return mechanism helps reduce jerking
• Shock-absorbing cushioning system for enhanced comfort
• Needle roller bearings for smooth articulation
• Up to 165° knee flexion
• ISO 10328:2016 tested for durability
• Suitable for users up to 125 kg

Advanced Features

Aerospace-Grade Aluminium Mainframe

Manufactured from aerospace-grade aluminium, the mainframe provides an excellent balance of strength and lightweight performance, helping reduce the overall weight of the prosthesis without compromising durability.

Steel Pyramid and Shafts

High-strength steel pyramid and shaft components improve structural integrity and provide dependable performance during daily activities.

Adjustable Sliding Pyramid

The adjustable sliding pyramid simplifies prosthetic alignment, allowing prosthetists to achieve an accurate and secure fit during assembly.

Soft-Close Return Mechanism

The integrated soft-close return mechanism helps minimise jerking during knee extension, supporting smoother and more controlled movement throughout the gait cycle.

Multi-Level Rubber Cushioning System

A multi-level rubber cushioning system helps absorb impact during walking, improving comfort and reducing shock transmitted through the prosthesis.

PTFE Washers

PTFE washers reduce friction between moving components, supporting smoother operation and helping minimise wear over time.

Needle Roller Bearings

High-quality needle roller bearings provide smooth and consistent joint movement while enhancing the durability of the knee mechanism.

Up to 165° Flexion

The knee joint allows up to 165° of flexion, providing a wide range of motion for everyday activities such as sitting, walking, and transitioning between movements.

Integrated Thread-Locking System

All fasteners are supplied with an integrated thread-locking system to help maintain secure assembly during prolonged use.

Tested for Reliability

The Polycentric Mechanical Knee Joint Aluminum has been tested according to ISO 10328:2016, demonstrating compliance with internationally recognised structural testing requirements for lower limb prosthetic components.

Specifications

• Product Type: Polycentric Mechanical Prosthetic Knee Joint
• Material: Aerospace-grade Aluminium
• Maximum Flexion: 165°
• Weight Capacity: Up to 125 kg
• Bearings: Needle Roller Bearings
• Testing Standard: ISO 10328:2016