1 1/4 Rigid Coupling – HZPT

Introduction to 1 1/4 Rigid Coupling

The 1 1/4 rigid coupling is an essential mechanical component designed for precision equipment alignment and torque transmission between two shafts. Unlike flexible couplings, rigid couplings ensure a fixed connection and provide high torsional rigidity and low backlash, making them ideal for various industrial applications.

rigid coupling

Key Features

  • Durable Construction: Made with high-quality materials, ensuring long-lasting performance in harsh industrial environments.
  • High Torsional Rigidity: Offers excellent torque transmission capabilities with minimal backlash.
  • Precision Alignment: Ensures precise shaft alignment, essential for the optimal performance of machinery.


  • Industrial Machinery: Perfect for connecting shafts in motors, pumps, compressors, and conveyors.
  • Power Transmission: Ideal for applications requiring precise torque transmission.
  • Automation and Robotics: Suitable for robotic arms and automated assembly lines where precision is critical.

Advantages of 1 1/4 Rigid Coupling

rigid coupling

The 1 1/4 rigid coupling offers several advantages for its applications:

  • Zero Backlash: Ensures accurate torque transmission without any play between the connected shafts.
  • Easy Installation: Simple design allows for quick and straightforward installation, reducing downtime.
  • Maintenance-Free: Once installed, these couplings require minimal maintenance, saving time and costs.
  • rigid coupling

  • Cost-Effective: Offers a cost-effective solution for rigid shaft connections without compromising quality or performance.
  • High Precision: Delivers high precision alignment, crucial for the efficiency and longevity of machinery.

Working Principle of Rigid Coupling

The working principle of a 1 1/4 rigid coupling revolves around its ability to connect two shafts securely to transmit torque and motion. It is designed to hold the shafts in a fixed position, ensuring zero backlash and maintaining alignment under various operating conditions. Through its solid construction, the coupling directly transmits power from one shaft to the other without any flexibility, making it suitable for applications where shaft alignment is critical.

How to Choose the Right Rigid Coupling

Selecting the appropriate 1 1/4 rigid coupling involves considering several factors:

  • Shaft Size: Ensure the coupling fits the 1 1/4 inch shaft diameter perfectly.
  • Application Requirements: Consider the torque, speed, and precision required by the application.
  • Material: Choose a material that suits the operating environment (e.g., corrosion resistance for chemical exposure).
  • Alignment: Verify that the coupling can support the level of alignment accuracy needed for your machinery.
  • Installation Space: Make sure there is adequate space for the coupling and its installation.

Maintenance of Rigid Coupling

Maintaining your 1 1/4 rigid coupling is straightforward but crucial for ensuring optimal performance and longevity. Regular inspections for wear and tear, ensuring proper alignment, and keeping the coupling clean from debris and corrosion are essential maintenance steps. Although these couplings are designed to be maintenance-free, periodic checks can prevent unexpected downtime and extend the service life of your machinery.

About HZPT

HZPT, established in 2006, is a leading manufacturer and exporter specializing in the design, development, and production of couplings. With a dedicated design and R&D team for 16 years, we offer customized product solutions globally. Our comprehensive quality control system spans from raw materials to finished products, ensuring all our products, including the 1 1/4 rigid coupling, meet the highest standards with CE and TUV certifications. Our philosophy is “Customer satisfaction, our pursuit.” We are committed to providing the highest quality products, exceptional service, and competitive prices. Our main clientele in Europe and America enjoys a prestigious reputation for our radial elastic couplings, tire couplings, universal couplings, gear couplings, plum elastic couplings, rigid couplings, cross couplings, roller chain couplings, membrane couplings, and more. Choosing HZPT means opting for reliability, quality, and a partnership dedicated to meeting your specific needs. We look forward to cooperating with new customers worldwide and establishing successful business relationships in the near future.