Introducing the new Z4 Expansion Sleeve by GQZ, a keyless coupling solution designed for heavy-duty applications in automotive, tractors, and construction machinery. With a robust design, it supports axial forces up to 1650 kN and torque up to 245 kN.m without weakening keyways. Easy to install and maintain, this high-strength coupling ensures long-lasting reliability. Experience the advanced technology for seamless load transmission. Welcome to visit our website!