Star Elastic Coupling with Steel Hubs and PU Spider

Product Overview

The star elastic coupling is a flexible jaw coupling designed to transmit torque between connected shafts while accommodating limited shaft misalignment. With durable metal hubs and a polyurethane elastic spider, this coupling provides a compact solution for industrial power transmission.

Apex Coupling supplies star elastic couplings in multiple sizes for machinery manufacturers, equipment maintenance companies and industrial distributors. Standard configurations and customized bore options can be reviewed according to your application requirements.

The elastic spider is positioned between the coupling hubs to transmit torque while helping reduce shock loads and vibration. Its design also supports convenient assembly and replacement of the elastic element when maintenance is required.

Key Features of Star Elastic Couplings

• Steel coupling hubs: Steel construction is available for applications requiring strength and durability.

• Polyurethane elastic spider: The elastomer provides elastic torque transmission and helps absorb shock and vibration.

• Compact structure: The jaw-type design supports installations where space is limited.

• H7 bore options: Precision finished bores can be supplied where specified for the selected model.

• Multiple sizes: Different coupling sizes are available to suit varying shaft diameters and torque requirements.

• Easy maintenance: The elastic spider can be inspected and replaced when necessary, subject to the coupling design.

• OEM and ODM support: Customized bore dimensions and other specifications can be discussed with the manufacturer.

• No routine lubrication for the elastic element: The flexible element does not require lubrication under normal operating conditions, although the connected equipment may have separate lubrication requirements.

Technical Specifications

Important: Torque, bore diameter and maximum speed must be verified for the exact model. Do not use a series-wide value as the rating of every coupling size.

How Does a Star Elastic Coupling Work?

A star elastic coupling consists of two coupling hubs with jaws and an elastic spider positioned between them. As the driving shaft rotates, the driving hub transfers torque through the spider to the driven hub.

The elastic element deforms slightly under load. This elasticity helps accommodate limited misalignment and reduce the transmission of some shocks and vibration.

The actual performance depends on the spider material, hardness, coupling size, operating temperature, torque and speed. Correct shaft alignment remains important for reliable operation and service life.

Polyurethane Spider for Flexible Power Transmission

The polyurethane spider is a key component of the star elastic coupling. Its mechanical properties influence torque transmission, elasticity, wear resistance and temperature suitability.

The correct spider should match the coupling series and size. Before ordering a replacement, confirm the coupling model, spider geometry, dimensions, hardness and required operating conditions.

The supplied product information lists an elastomer hardness of 98 Shore A for a related configuration. Confirm this value for the specific model before publishing it as a specification for the entire product range.

Steel Hubs and Precision Bore Options

Steel hubs are suitable for applications that require a robust metal coupling body. Depending on the selected model, surface treatments such as black oxide may be available to help meet the required finish and corrosion-protection needs.

H7 finished bores can be specified where supported by the product design. Keyways and other shaft connection options should be confirmed according to the selected model.

When ordering, provide both shaft diameters and indicate whether the driving and driven ends require different bore sizes. A technical drawing is recommended for non-standard configurations.

Applications

Star elastic couplings may be used in compatible power transmission systems, including:

• Industrial machinery

• Pumps and general drive systems

• Gearboxes and motor-driven equipment

• Automation equipment

• Conveyors and material-handling systems

• Machinery requiring elastic torque transmission

• OEM equipment requiring customized shaft connections

The coupling must be selected according to the equipment’s actual torque, speed, alignment and operating environment.

How to Select the Right Star Elastic Coupling

Before choosing a model, review the following points:

1. Shaft diameters: Confirm the bore size required at both ends.

2. Rated torque: Calculate the operating torque and consider starting or shock loads.

3. Rotational speed: Check the maximum permitted speed for the selected size.

4. Misalignment: Determine the expected angular, radial and axial displacement.

5. Spider material: Confirm the elastomer material, hardness and temperature requirements.

6. Installation space: Check the outside diameter, overall length and hub dimensions.

7. Operating environment: Consider temperature, oil exposure, dust and moisture.

8. Maintenance requirements: Confirm access for inspection and spider replacement.

Correct sizing helps prevent premature spider wear, overheating and unnecessary loads on connected equipment.

Star Elastic Coupling Manufacturer and OEM Supplier

Apex Coupling supplies flexible couplings for industrial power transmission applications. Standard models and customized specifications can be reviewed for equipment manufacturers, distributors and maintenance buyers.

For a quotation, please provide the coupling model, bore sizes, required torque, operating speed and installation dimensions. Our team can review your requirements and help confirm a suitable configuration.

Contact Apex Coupling

Website: https://www.apexcoupling.com/
Email: ella@apexcoupling.com
WhatsApp: +86 13437856962

Frequently Asked Questions

What is a star elastic coupling?

A star elastic coupling is a flexible jaw coupling that uses an elastic spider between two hubs to transmit torque and help accommodate limited misalignment.

What is the function of the polyurethane spider?

The PU spider transfers torque between the hubs while providing elasticity. It can help reduce shock transmission and vibration, depending on the material and operating conditions.

Can the bore size be customized?

Bore options depend on the selected coupling model. Provide both shaft diameters and any keyway requirements when requesting a quotation.

What torque can a star elastic coupling transmit?

The allowable torque depends on the coupling size, spider material, operating speed and application conditions. Confirm the rating for the exact model before selection.

How do I choose a replacement spider?

Confirm the coupling series, size, spider dimensions, hardness and operating conditions. A photograph and dimensional drawing can help the supplier identify a compatible replacement.