🔸 Introduction

In high-performance industrial transmission systems, selecting the right shaft connection solution is critical.

Two widely used options are locking assemblies and shrink discs. Both are keyless locking devices designed for high torque transmission, but they differ in structure, installation, and application.

This guide compares locking assembly vs shrink disc to help you choose the best solution.

🔸 What Is a Locking Assembly?

A locking assembly is a keyless shaft connection device installed between the shaft and hub. It uses tapered surfaces and bolts to generate clamping force.

✔ Features:

• Installed inside the hub
• High precision connection
• Easy installation and removal
• Suitable for various applications

🔸 What Is a Shrink Disc?

A shrink disc is mounted externally on a hollow shaft and creates a friction connection by compressing the shaft onto the hub.

✔ Features:

• External mounting
• Extremely high torque capacity
• Used for heavy-duty applications
• No shaft machining required

🔸 Key Differences

🔸 When to Use Locking Assembly

Choose locking assembly when:

• Precision alignment is required
• Internal mounting is preferred
• Flexible installation is needed
• Space is limited

🔸 When to Use Shrink Disc

Choose shrink disc when:

• Extremely high torque is required
• Hollow shaft design is used
• Heavy-duty conditions exist
• External mounting is acceptable

🔸 Conclusion

Both locking assemblies and shrink discs are excellent solutions for shaft-hub connections.

👉 Use locking assembly for flexible, precise, and general applications
👉 Use shrink disc for extreme torque and heavy-duty systems

Choosing the right solution ensures optimal performance and long service life.

🔸 CTA

Need help selecting between locking assembly and shrink disc?

📩 Contact Apexcoupling for expert engineering support and custom solutions.

• shrink disc vs locking assembly
• keyless locking device
• shaft locking system
• high torque shaft connection