Z12 Locking Assembly Double Taper Heavy Duty Keyless Shaft Locking Device | Apexcoupling
🔸 Introduction
Locking assemblies are widely used for shaft-hub connections in modern machinery. Among different designs, single taper and double taper locking assemblies are the most common.
Understanding the difference between them is essential for selecting the right solution for your application.
🔸 What Is a Single Taper Locking Assembly?
A single taper locking assembly uses one tapered interface to generate clamping force between the shaft and hub.
✔ Features:
- Simple structure
- Easy installation
- Cost-effective
- Suitable for general applications
🔸 What Is a Double Taper Locking Assembly?
A double taper locking assembly (such as Z12 / AL-L type) uses two tapered surfaces to create stronger and more uniform clamping force.
✔ Features:
- Higher torque capacity
- Better concentricity
- Stronger locking performance
- Suitable for heavy-duty applications
🔸 Key Differences
| Feature | Single Taper | Double Taper |
|---|---|---|
| Structure | One taper | Two tapers |
| Torque Capacity | Medium | High |
| Precision | Medium | High |
| Stability | Standard | Strong |
| Application | General use | Heavy-duty |
🔸 When to Choose Double Taper Locking Assembly
Choose double taper locking assembly when:
- High torque is required
- Load is heavy or dynamic
- Precision alignment is important
- Long-term stability is needed
👉 Typical applications:
- Heavy machinery
- CNC systems
- Industrial automation
🔸 When to Choose Single Taper Locking Assembly
Choose single taper locking assembly when:
- Load is moderate
- Budget is limited
- Application is standard
🔸 Conclusion
Both single and double taper locking assemblies have their advantages.
👉 Single taper is suitable for standard applications.
👉 Double taper is ideal for high performance and heavy-duty systems.
Choosing the right structure can improve efficiency and extend equipment life.
🔸 CTA
Need help selecting the right locking assembly?
📩 Contact Apexcoupling for expert advice and custom solutions.
- single taper vs double taper locking assembly
- locking assembly types
- keyless locking device
- shaft locking system


