tooth coupling for ATMs

Tooth Coupling for ATMs


A tooth coupling is an essential component used in ATMs to transmit torque between the motor and the load. Its purpose is to ensure smooth and efficient power transmission, minimizing vibrations and enhancing overall machine performance. This article will discuss the various aspects of tooth couplings for ATMs, including their design, functionality, selection criteria, and lubrication requirements.

Design and Functionality

1. Tooth Profile:

The tooth profile of a coupling plays a crucial role in its performance. A precise tooth profile, such as the involute, ensures maximum contact area and minimizes stress concentration, resulting in improved torque transmission efficiency.

2. Material Selection:

The choice of material for a tooth coupling depends on several factors, including the magnitude of the transmitted torque, operating speed, and environmental conditions. Common materials used for tooth couplings include steel alloys, stainless steel, and aluminum alloys.

3. Tooth Engagement:

Proper tooth engagement is vital for the smooth operation of a tooth coupling. It is achieved by maintaining accurate alignment between the teeth of the driving and driven hubs, which prevents backlash and ensures efficient torque transmission.

4. Misalignment Compensation:

To accommodate slight misalignments between the motor and the load, certain tooth couplings are designed with angular, parallel, or axial misalignment capabilities. These couplings can compensate for minor installation errors and provide reliable power transmission.

5. Torque Limitation:

In ATMs, tooth couplings are often equipped with torque limiters to protect the system from sudden overloads and prevent damage. These limiters disengage the coupling when a predetermined torque threshold is exceeded, ensuring the safety and longevity of the machine.


Adequate lubrication is crucial for the smooth and efficient operation of tooth couplings. It helps reduce friction, minimize wear, and dissipate heat. When selecting a lubricant for a tooth coupling, factors such as operating speed, temperature, and load should be considered. Regular lubrication maintenance is recommended to extend the coupling’s lifespan and ensure optimal performance.

tooth coupling

Choosing or Customizing the Right Tooth Coupling

When selecting or customizing a tooth coupling for specific ATM applications, several parameters and practical considerations need to be taken into account:

1. Torque Capacity:

The tooth coupling should have a torque capacity that exceeds the maximum torque requirement of the ATM system, allowing for smooth operation even under peak loads.

2. Shaft Size and Fit:

The coupling’s hub bores and keyways should match the dimensions of the motor and load shafts, ensuring a secure and accurate fit for efficient torque transmission.

3. Operating Speed:

The tooth coupling’s maximum rotational speed must be compatible with the ATM system’s requirements to prevent premature wear and failure.

4. Environmental Conditions:

Consideration should be given to factors such as temperature, humidity, and exposure to dust or corrosive substances. The chosen tooth coupling should be resistant to these conditions to ensure long-lasting performance.

5. Maintenance and Replacement:

Easy installation, inspection, and maintenance procedures should be considered when selecting a tooth coupling. Additionally, availability of spare parts and quick replacement options can minimize downtime and ensure uninterrupted ATM operation.

tooth coupling

HZPT – Your Reliable Tooth Coupling Provider

HZPT, located in Hangzhou, Zhejiang Province, is a modern enterprise that specializes in research, development, production, and international trade. Our company is committed to delivering high-quality tooth couplings that meet the specific requirements of the ATM industry.

Our advantages include:

1. Extensive Product Range:

We offer a comprehensive selection of tooth couplings, including drum couplings, pin-bush couplings, disc couplings, universal couplings, star couplings, expansion couplings, and tire couplings. Our diverse product range caters to various ATM system configurations and torque transmission needs.

2. Quality Assurance:

At HZPT, we prioritize quality. We have implemented a complete and scientific quality management system, and our products are certified with CQC, ISO, CE, and other relevant certifications. Our in-house technical development and testing departments ensure that every tooth coupling meets the highest standards of performance and durability.

3. Sales and Technical Support:

We pride ourselves on offering excellent sales and technical support to our customers. Our dedicated team is ready to assist with product selection, provide technical guidance, and address any inquiries or concerns promptly.

4. Strong Partnership:

We have established partnerships with over a hundred companies, collaborating with them based on the principles of “people-oriented” and “customer-first.” We strive for mutual growth and development alongside our clients.

5. Global Presence:

With a focus on international trade, we have expanded our business network to Asia, Europe, Africa, and North America. Our goal is to become a globally influential enterprise and contribute to the advancement of the tooth coupling industry.

tooth coupling