🔸 Introduction

The TLK locking assembly is a widely used keyless shaft-hub connection solution in modern industrial transmission systems.

Compared with traditional keyway connections, TLK locking assemblies provide higher precision, better torque transmission, and easier installation.

In this guide, we will explain TLK series types, compare TLK200, TLK300, and TLK400, and help you choose the right model for your application.

🔸 What Is a TLK Locking Assembly?

A TLK locking assembly is a mechanical device that connects a shaft and hub through friction generated by tightening screws and tapered surfaces.

Unlike key connections, it does not require keyways, which helps reduce stress concentration and improves overall performance.

✔ Key Advantages:

• High torque transmission
• Zero backlash connection
• High concentricity
• Easy installation and removal
• Reusable design

🔸 TLK Series Overview

The TLK series includes multiple models designed for different load capacities and installation requirements.

🔹 Common Types:

• TLK200 – Light-duty applications
• TLK300 – Medium-duty applications
• TLK400 – Heavy-duty and high precision applications

Each type varies in structure, torque capacity, and clamping performance.

🔸 TLK200 vs TLK300 vs TLK400 (Key Differences)

🔸 TLK200 Locking Assembly

The TLK200 locking assembly is designed for light-duty applications where space and cost are important factors.

✔ Features:

• Compact design
• Easy installation
• Cost-effective

👉 Typical Applications:

• Small motors
• Light conveyors
• Compact machinery

🔸 TLK300 Locking Assembly

The TLK300 locking assembly is a balanced solution between performance and cost.

✔ Features:

• Higher torque capacity than TLK200
• Better precision and stability
• Suitable for general industrial use

👉 Typical Applications:

• Pumps
• Gear systems
• Medium-load machinery

🔸 TLK400 Locking Assembly

The TLK400 locking assembly is designed for high-performance applications requiring strong clamping force and high precision.

✔ Features:

• High torque transmission
• Excellent concentricity
• Strong locking force
• Suitable for dynamic loads

👉 Typical Applications:

• Servo motor systems
• CNC machines
• Heavy-duty equipment

🔸 How to Choose the Right TLK Locking Assembly

Choosing the right TLK locking assembly depends on several factors:

1️⃣ Torque Requirement

• Low torque → TLK200
• Medium torque → TLK300
• High torque → TLK400

2️⃣ Precision Requirement

• Standard precision → TLK200
• Higher precision → TLK300
• High precision → TLK400

3️⃣ Working Conditions

• Light-duty → TLK200
• General industrial → TLK300
• Heavy-duty / dynamic load → TLK400

4️⃣ Installation Space

• Limited space → TLK200
• Standard → TLK300
• Robust system → TLK400

🔸 Application Scenarios

TLK locking assemblies are widely used in:

• Shaft-hub connections
• Belt pulleys
• Gear transmission systems
• Servo motor systems
• CNC and automation equipment

Their ability to provide precise and backlash-free connections makes them ideal for modern industrial systems.

🔸 Why Choose Apexcoupling

Apexcoupling offers a full range of TLK locking assemblies with:

• High-quality 45# steel materials
• Precision machining (H7 tolerance)
• Strict quality control
• Custom size and design support
• Competitive factory pricing

🔸 Conclusion

The TLK locking assembly series provides flexible solutions for different industrial needs:

👉 TLK200 for light-duty applications
👉 TLK300 for balanced performance
👉 TLK400 for high torque and precision

Choosing the right model can improve transmission efficiency, reduce maintenance, and extend equipment life.

🔸 CTA（🔥）

Not sure which TLK locking assembly fits your system?

📩 Contact Apexcoupling now for professional selection support and fast quotation.

• TLK200 vs TLK300 vs TLK400
• locking assembly types
• keyless locking device
• shaft locking system
• power locking assembly