ROTEX 28 Coupling Replacement – 98 Shore A PU Spider

Product Overview

Apex Coupling supplies ROTEX-compatible flexible jaw couplings for industrial power transmission applications. This DJ-A type star elastic coupling is designed to connect rotating shafts through two metal hubs and an elastomeric spider, helping transmit torque while providing a degree of flexibility and vibration damping.

The ROTEX 28 compatible model is part of a wider size range that includes ROTEX 14, 19, 24, 28 and larger sizes. It is suitable for applications requiring a compact jaw coupling with customizable bore options, subject to the selected configuration and technical verification.

The supplied product information identifies a 98 Shore A PU spider, axial plug-in installation and OEM customization support. Bore dimensions, hub material, fastening method, torque rating and operating speed should be confirmed for the exact model before ordering.

Key Features

• ROTEX 28 compatible design: Intended as a replacement option for compatible jaw coupling installations.

• 98 Shore A PU spider: The listed polyurethane elastomer provides the flexible element between the metal hubs.

• Compact construction: Suitable for industrial shaft connections where installation space is limited.

• Vibration and shock damping: The elastomer can help reduce the transmission of some shocks and vibrations.

• Custom bore options: Shaft bore dimensions can be specified according to the selected model and manufacturing requirements.

• Axial plug-in assembly: The coupling design supports axial assembly; verify the installation method for the selected configuration.

• OEM/ODM support: Custom dimensions and material requirements can be reviewed against technical drawings.

• Multiple size options: The listed range includes ROTEX-compatible sizes from ROTEX 14 through ROTEX 180.

Technical Specifications

Technical note: The supplied dimensional information for ROTEX 28 in the earlier size list gives an outer diameter of 65 mm, a length of 90 mm and a listed bore range of 10–42 mm. Please verify that these dimensions apply to this exact DJ-A configuration before publishing them as confirmed specifications.

How a Jaw Coupling Works

A flexible jaw coupling generally consists of two metal hubs with interlocking jaws and an elastomeric spider positioned between them.

When the driving shaft rotates, torque passes from the first hub through the spider to the second hub. The elastomer deforms slightly under load, allowing the coupling to provide flexibility and damp some vibration and shock.

Performance depends on the coupling size, hub geometry, spider material, operating torque, speed and shaft alignment. The coupling should not be operated beyond its verified ratings.

98 Shore A PU Spider

The supplied product description lists a polyurethane spider with a hardness of 98 Shore A.

Hardness is one factor affecting elastomer behavior, but it does not by itself establish the allowable torque, torsional stiffness, temperature resistance or service life. These properties should be checked against the manufacturer’s technical data for the selected coupling size.

When ordering a replacement spider, confirm the coupling model, spider dimensions, material specification and operating conditions. A spider that looks similar may not be interchangeable.

Available Coupling Sizes

The product range information supplied for this series includes:

ROTEX 14, ROTEX 19, ROTEX 24, ROTEX 28, ROTEX 38, ROTEX 42, ROTEX 48, ROTEX 55, ROTEX 65, ROTEX 75, ROTEX 90, ROTEX 100, ROTEX 110, ROTEX 125, ROTEX 140, ROTEX 160 and ROTEX 180.

Dimensions and bore ranges vary by size. Confirm the drawing and technical specifications for the exact model before ordering.

Typical Applications

Depending on the verified ratings and operating conditions, flexible jaw couplings may be used in:

• Industrial pumps and drive assemblies

• Manufacturing and production equipment

• Packaging and printing machinery

• Machinery repair and maintenance

• General mechanical power transmission

• Selected construction and processing equipment

For each application, check continuous and peak torque, speed, shaft alignment, operating temperature and environmental exposure.

How to Select a ROTEX 28 Replacement

1. Confirm the Coupling Dimensions

Check the outer diameter, overall length, hub dimensions and available installation space. Do not select a replacement by size label alone.

2. Measure Both Shaft Bores

Provide the driving and driven shaft diameters separately. Specify keyways, clamping screws or other connection requirements.

3. Verify Torque and Speed

Provide continuous torque, peak torque, operating speed and duty cycle. Request the verified ratings for the complete coupling and selected spider.

4. Confirm the PU Spider

Check the spider geometry, material and hardness. Confirm temperature and chemical compatibility for the operating environment.

5. Review Installation and Alignment

Confirm the manufacturer’s permitted misalignment limits and assembly procedure. Incorrect installation or excessive misalignment can shorten the service life of the spider.

OEM and ODM Customization

Apex Coupling supports inquiries for customized flexible jaw couplings. Depending on technical feasibility, requests may include:

• Customized bore diameters

• Keyway or fastening requirements

• Selected hub materials

• Dimensions based on customer drawings

• OEM/ODM manufacturing requirements

Please provide the required model, shaft dimensions, operating torque, speed, temperature, quantity and technical drawing when available.

Request a Quote

Looking for a ROTEX 28 coupling replacement? Contact Apex Coupling to confirm dimensions, compatible components, materials and model-specific ratings.

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

Send your coupling drawing or existing component dimensions to help us review the replacement requirements.

Frequently Asked Questions

What is a ROTEX 28 coupling replacement?

It is a compatible replacement option for a jaw coupling installation identified as size ROTEX 28. Confirm the dimensions and compatibility before ordering.

What does 98 Shore A mean?

Shore A is a hardness scale commonly used for elastomeric materials. Hardness alone does not establish the coupling’s torque capacity or complete operating performance.

Can the bore size be customized?

The supplied product description indicates customization support. Confirm the required shaft diameters and connection details with the manufacturer.

Is the coupling suitable for high-speed operation?

Speed suitability depends on the complete assembly, including its dimensions, balance, spider and installation conditions. Obtain the verified speed limit for the selected model.

Can I replace only the spider?

Potentially, if the spider is compatible with the existing hubs and the hubs are in suitable condition. Confirm the spider’s geometry and material before replacing it.

What information is needed for a quotation?

Provide the model, both shaft diameters, torque, operating speed, temperature, installation dimensions, quantity and any material or certification requirements.