DLZ Aluminum Alloy Expansion Sleeve Jaw Coupling for Servo Motors

Product Overview

Apex Coupling supplies the DLZ Series aluminum alloy expansion sleeve jaw coupling for precision power transmission applications. This flexible jaw coupling features an aluminum alloy hub design, a polyurethane (PU) spider and an expansion sleeve locking structure intended to provide a secure shaft connection.

The DLZ series is designed for applications that require compact construction, convenient installation and reliable torque transmission. The elastic spider provides a degree of flexibility and helps accommodate limited shaft misalignment, subject to the specifications of the selected model.

The supplied product information lists H7 bore tolerance, an oxidized aluminum alloy hub surface and a replaceable elastic element. Multiple sizes are available, and customized bore dimensions or other non-standard requirements can be reviewed.

Key Features

• Aluminum alloy hubs: Lightweight construction for compatible precision drive applications.

• Expansion sleeve locking: Designed to secure the shaft-to-hub connection; confirm the exact clamping arrangement for the selected model.

• H7 bore tolerance: Listed as a standard bore tolerance in the supplied product information.

• PU elastic spider: Helps transmit torque while providing a degree of flexibility and vibration damping.

• Low-backlash design: The supplied product description specifies zero rotational backlash; verify this performance against the selected configuration and test conditions.

• Surface oxidation: The aluminum alloy hub is listed with an anodized surface treatment.

• Flexible shaft connection: Can accommodate limited radial, angular and axial displacement within the manufacturer’s specified limits.

• Custom bore options: Additional bore sizes and connection configurations can be reviewed.

• OEM/ODM support: Non-standard requirements can be assessed against customer drawings.

Technical Specifications

Model-specific dimensions and ratings must be confirmed before ordering. The supplied material includes different length information for the DLZ-80 model and does not provide a complete verified dimension table for every configuration. Request the latest drawing for the selected model.

How the DLZ Coupling Works

A jaw coupling typically consists of two hubs with interlocking jaws and an elastic spider between them. In the DLZ design, the expansion sleeve locking arrangement is intended to secure the hubs to the shafts.

Torque passes from the driving shaft through the first hub, across the elastic spider and into the second hub and driven shaft. The spider deforms slightly under load, helping accommodate limited misalignment and damp some vibration.

Actual performance depends on hub geometry, the locking mechanism, spider material, shaft fit, operating torque and installation conditions. Confirm the manufacturer’s specifications before use.

Available DLZ Sizes

The supplied product information includes the following model designations:

• DLZ-55×78

• DLZ-65×90

• DLZ-80×114

• DLZ-95×126

• DLZ-105×140

Additional bore combinations may be available. The source information also mentions a DLZ-80×111.5 dimension, so the correct overall length should be confirmed with the manufacturer before publication or ordering.

Please provide the required shaft bore diameters and verify the overall dimensions against the selected model drawing.

Materials and Surface Treatment

The supplied description identifies aluminum alloy hubs and a PU elastic spider. The hub surface is described as anodized, while the PU spider is intended to provide flexibility and wear resistance.

Material performance depends on the exact alloy, surface treatment, elastomer formulation and operating environment. If the application involves oil, chemicals, elevated temperatures or special cleanliness requirements, provide these details when requesting a quotation.

Typical Applications

Depending on the selected model and verified ratings, DLZ aluminum alloy jaw couplings may be considered for:

• CNC machinery and compatible spindle drives

• Servo motor transmission systems

• Packaging and food processing machinery

• Printing machinery

• Photovoltaic manufacturing equipment

• Semiconductor equipment

• Woodworking machinery

• Selected metallurgical and industrial automation equipment

Check torque, operating speed, shaft alignment, environmental conditions and installation requirements before selecting a coupling for a specific machine.

How to Select the Right DLZ Coupling

1. Confirm the Shaft Diameters

Provide the driving and driven shaft diameters separately. Specify the required H7 bore fit and any additional connection requirements.

2. Check the Locking Structure

Confirm the expansion sleeve arrangement and the installation space available. Do not assume that all DLZ-compatible designs use identical locking components.

3. Verify Torque and Speed

Provide continuous torque, peak torque, normal operating speed and duty cycle. Obtain the verified allowable ratings for the exact coupling model.

4. Review Misalignment

Confirm the manufacturer’s permitted radial, angular and axial displacement. The coupling should not be used to compensate for excessive shaft misalignment.

5. Confirm Spider Compatibility

Verify the PU spider’s dimensions and material specification. The elastic element must be compatible with the hub geometry and operating conditions.

6. Request a Technical Drawing

Before placing an order, confirm the outer diameter, overall length, bore sizes, mounting dimensions and assembly method using the drawing for the exact model.

OEM and ODM Customization

Apex Coupling accepts inquiries for customized coupling requirements, subject to technical review. Please provide:

• Required model or technical drawing

• Driving and driven shaft diameters

• Required bore tolerance and connection details

• Operating torque and speed

• Installation dimensions

• Working temperature and environment

• Order quantity and special material requirements

The final configuration and performance specifications should be confirmed before production.

Request a Quote

Looking for a DLZ aluminum alloy jaw coupling for your equipment? Contact Apex Coupling to confirm the model, shaft bores, locking structure and technical ratings.

Email: ella@apexcoupling.com
WhatsApp: +86 13437856962

Send your drawing or existing coupling dimensions to help us review the appropriate configuration.

Frequently Asked Questions

What is a DLZ aluminum alloy jaw coupling?

It is a jaw coupling design that uses aluminum alloy hubs and an elastic spider, with the supplied DLZ series featuring an expansion sleeve locking arrangement.

What is the benefit of an aluminum alloy hub?

Aluminum alloy can reduce hub weight compared with many steel designs. Suitability still depends on the required torque, shaft connection and operating conditions.

Does the DLZ coupling have zero backlash?

The supplied product description specifies zero rotational backlash. Confirm the actual performance and test conditions for the exact model before relying on this specification.

Can the bore size be customized?

The supplied information indicates that additional bore configurations and non-standard customization can be requested. Provide both shaft diameters and the required connection details.

Is the DLZ coupling suitable for every servo motor?

No. Selection depends on torque, speed, shaft dimensions, alignment, locking method and the requirements of the complete drive system.

How do I confirm the correct model?

Provide the existing model number or a technical drawing, both shaft diameters, operating torque and speed. Confirm all dimensions and ratings before ordering.