Introduction

Ordering the wrong coupling spider can cause installation problems, excessive vibration and premature wear.

Before purchasing a replacement, measure the existing spider and coupling carefully.

1. Identify the Coupling Model

Check whether the existing coupling is:

• GS
• GR
• MT
• HRC
• Other jaw coupling designs

If a model number is printed on the coupling, record it.

2. Measure Outside Diameter

Measure the outside diameter of the spider.

Record the dimension in millimeters.

3. Measure Thickness

Measure the thickness of the spider.

Some coupling spiders have different thickness dimensions depending on the design.

4. Count the Spider Lobes

Count the number of spider lobes.

For example:

• 4 lobes
• 6 lobes
• 8 lobes
• 10 lobes

The lobe geometry must match the coupling hubs.

5. Check Hub Dimensions

If possible, also measure:

• Hub outside diameter
• Jaw dimensions
• Shaft bore
• Coupling overall dimensions

This information helps the manufacturer identify the correct model.

6. Take Photos

A clear photograph of the complete coupling is extremely useful.

For OEM replacement, it is even better to provide:

Photo + Dimensions + Existing Sample + Model Number

Need Help Identifying Your Coupling Spider?

Send your photos and dimensions to:

ella@apexcoupling.com

WhatsApp:

+86 13437856962

Apex Coupling can help confirm the appropriate spider insert and custom requirements.