DR Series Aluminum Alloy Bellows Coupling

Product Overview

The DR series aluminum bellows coupling is a precision flexible shaft coupling designed for servo motors, stepper motors and other precision motion control systems.

It features aluminum alloy clamping hubs and a stainless steel metal bellows element. The bellows are laser-welded to the hubs to create a compact, backlash-free connection for accurate torque transmission.

The flexible stainless steel bellows can compensate for radial, angular and axial shaft misalignment while maintaining torsional stiffness. This makes the DR series suitable for applications that require accurate positioning, smooth motion transmission and reliable operation during forward and reverse rotation.

Apex Coupling manufactures DR series aluminum bellows couplings in multiple sizes and bore configurations. Standard models and customized bore combinations are available for OEM equipment manufacturers, machinery builders and industrial distributors.

Key Features of DR Series Bellows Couplings

1. Aluminum Alloy Hubs with Stainless Steel Bellows

The coupling hubs are made from aluminum alloy, while the central bellows element is manufactured from stainless steel.

This combination provides a lightweight coupling structure with a flexible metal transmission element. The stainless steel bellows also offers corrosion resistance for suitable industrial operating environments.

2. Laser-Welded Construction

The metal bellows are laser-welded to the aluminum alloy hubs. This integrated construction provides a secure connection between the bellows and the hubs.

The coupling is designed for zero rotational backlash, making it suitable for precision motion transmission.

3. Compensation for Shaft Misalignment

The flexible bellows structure can compensate for radial, angular and axial shaft misalignment within the allowable limits of the selected coupling size.

Proper alignment is still recommended to reduce additional loads and extend coupling service life.

4. Suitable for Servo and Stepper Motors

The DR series is designed for servo motor and stepper motor applications. Its compact structure and backlash-free transmission characteristics make it suitable for positioning systems and precision automation equipment.

5. Clamp-Type Fastening

The coupling uses a clamping structure to secure the hubs to the connected shafts. This provides a convenient shaft connection and helps simplify installation and removal.

6. Forward and Reverse Rotation

The bellows coupling supports positive and negative rotation and is suitable for drive systems that frequently change direction.

7. Multiple Bore Sizes and Customization

Apex Coupling provides a range of standard bore combinations. Customized bore sizes and other specifications can be discussed according to shaft dimensions, equipment requirements or customer drawings.

Technical Specifications

Technical note: The supplied product information contains different torque and speed figures, including 0.8–18 and 4500–20000 RPM, while another attribute lists 500 N·m and 3000 RPM. These figures have not been included as confirmed product ratings. Please contact us to verify the rated torque and maximum speed for each model.

DR Series Aluminum Bellows Coupling Dimensions

The following models and dimensions are based on the supplied product list. All dimensions are in millimeters (mm).

The listed bore diameters represent available size ranges. Please confirm the required bore diameter for each shaft when placing an inquiry.

Custom bore combinations and non-standard dimensions can be discussed according to your application.

Applications of Aluminum Bellows Couplings

The DR series aluminum bellows coupling is suitable for precision mechanical transmission and motion control applications.

Typical applications include:

• Servo motor drive systems

• Stepper motor drive systems

• CNC machine tools

• Printing machinery

• Packaging equipment

• Industrial automation systems

• Precision positioning equipment

• Measuring and testing instruments

• Small and medium-sized transmission machinery

Its flexible metal bellows structure helps accommodate shaft misalignment while maintaining accurate rotational transmission.

How to Select the Right Bellows Coupling

Selecting the correct bellows coupling requires more than matching the outer diameter. Consider the following parameters before ordering.

1. Shaft Bore Diameter

Confirm the shaft diameter on both connected sides. Different bore combinations can be supplied according to the motor and driven equipment shafts.

2. Outer Diameter and Overall Length

Check the available installation space and compare it with the coupling outer diameter and overall length.

3. Torque Requirements

Provide the normal operating torque and peak torque. The selected coupling must have sufficient torque capacity for the application.

4. Rotational Speed

Confirm the operating speed and maximum required speed. The allowable speed depends on the coupling size, balance, installation and operating conditions.

5. Shaft Misalignment

Evaluate the expected radial, angular and axial misalignment. The coupling should operate within its allowable compensation limits.

6. Operating Environment

Consider temperature, moisture, corrosion exposure and other environmental factors when selecting the coupling and surface treatment.

7. Shaft Fastening Method

Confirm whether the clamp-type fastening structure is suitable for the connected shafts and installation space.

For assistance with model selection, send Apex Coupling your shaft diameters, required torque, rotational speed and installation dimensions.

Why Choose Apex Coupling?

Apex Coupling supplies flexible couplings and industrial power transmission components to international machinery manufacturers, distributors and industrial customers.

• Manufacturer supply: Direct sourcing from a coupling manufacturer in China.

• Multiple standard sizes: DR series models with different outer diameters and lengths.

• Custom bore options: Bore combinations according to customer shaft dimensions.

• Precision construction: Aluminum alloy hubs and laser-welded stainless steel bellows.

• OEM and ODM service: Customized production according to drawings, samples and technical requirements.

• Technical assistance: Support with coupling selection and specification confirmation.

Frequently Asked Questions

What is an aluminum bellows coupling?

An aluminum bellows coupling is a flexible shaft coupling that uses aluminum alloy hubs and a metal bellows element to transmit torque between two shafts. The bellows provide flexibility to compensate for certain types of shaft misalignment.

What materials are used in the DR series bellows coupling?

The coupling hubs are made from aluminum alloy, and the central metal bellows are made from stainless steel.

Is the DR series suitable for servo motors?

Yes. The DR series is designed for servo motor and stepper motor applications where compact dimensions, low rotational backlash and accurate motion transmission are required.

Does the DR series support reverse rotation?

Yes. The coupling is designed for both forward and reverse rotation.

Can the bellows coupling compensate for shaft misalignment?

Yes. Its flexible bellows structure can compensate for radial, angular and axial misalignment within the allowable limits of the selected model.

Can I order a customized bore size?

Yes. Apex Coupling offers customized bore combinations and non-standard specifications according to customer shaft dimensions and technical requirements.

How do I choose the correct DR series model?

Provide the shaft bore diameters, required outer diameter, overall length, operating torque, rotational speed and expected shaft misalignment. Our team can help identify a suitable model.

Request a Quote for DR Series Aluminum Bellows Couplings

Looking for a precision aluminum bellows coupling for servo motors, stepper motors or automation equipment?

Apex Coupling offers DR series metal bellows couplings with aluminum alloy hubs, stainless steel bellows, clamp-type fastening and customized bore options.

Send us your required dimensions, shaft specifications or technical drawing. Our team will help you select a suitable coupling.

Website: https://www.apexcoupling.com/

Email: ella@apexcoupling.com

WhatsApp: +86 13437856962