CAT E320 Undercarriage Sprocket Compatibility, Dimensions, and Replacement Guide

To select a compatible CAT E320 undercarriage sprocket, I recommend confirming the exact excavator configuration, measuring the existing undercarriage, and matching the sprocket to the track chain rather than relying on the machine name alone. CAT E320 machines may differ by model generation, serial number, track gauge, shoe configuration, and undercarriage arrangement. I supply replacement sprockets through Zhonghai Jiuchuan, but I do not treat a catalog image or a general E320 label as sufficient proof of compatibility. The safest purchasing decision uses the machine identification plate, part number, physical measurements, and photographs together.

Click here to get more.

This guide explains how I evaluate CAT E320 sprocket compatibility, which dimensions matter, what material and design details affect service use, and how buyers can reduce ordering risk. It is intended for excavator owners, parts distributors, repair contractors, and procurement teams sourcing replacement undercarriage components. Because exact dimensions can vary by configuration, the final part should be confirmed against verified machine and component information.

Who This Guide Is For

I prepared this guide for buyers who need a CAT E320 undercarriage sprocket for repair, scheduled maintenance, fleet stocking, or replacement of worn track-drive components. It is especially useful when the original sprocket is damaged, the part number is unclear, or a machine has already received aftermarket undercarriage components. It can also help distributors collect the correct technical information before requesting a quotation.

This guide is not a substitute for the excavator service manual or a qualified technician’s inspection. If the machine has mixed undercarriage parts, severe track-chain wear, or an unknown repair history, I recommend confirming the complete track-group configuration before ordering only one component. A sprocket that appears visually similar may still differ in tooth profile, mounting pattern, offset, or working width.

What a CAT E320 Undercarriage Sprocket Does

The sprocket transfers torque from the final drive into the track chain. Its teeth engage with the track bushings and help move the crawler assembly as the excavator travels or works. Correct engagement depends on the relationship between sprocket tooth geometry, track pitch, bushing diameter, chain design, and the condition of the surrounding undercarriage.

A sprocket is therefore more than a simple round steel part. Its working profile must match the track chain, while its mounting features must fit the final-drive or carrier arrangement. If the engagement geometry is incorrect, the machine may experience accelerated wear, poor tracking, abnormal noise, or repeated undercarriage damage, although the actual symptom should be confirmed by inspection rather than assumed from appearance alone.

Compatibility Factors I Check Before Quotation

Machine Identification and Configuration

I first ask for the exact machine model, serial number, and production information available on the excavator. “CAT E320” identifies a machine family, but it may not identify every undercarriage configuration used across different generations or markets. I also ask whether the machine uses a standard, heavy-duty, narrow, or otherwise modified track arrangement.

Photos of the machine identification plate and the complete undercarriage are useful because they provide context that a short product description cannot. I normally request at least 3 clear photographs: one of the identification plate, one of the sprocket installed on the machine, and one showing the complete track chain and final-drive area. These images do not replace measurements, but they help identify mismatched components and unusual installations.

Track Chain and Sprocket Relationship

The sprocket should be matched to the track chain that is actually installed, not only to the chain that was originally supplied with the excavator. Important points include track pitch, bushing size, tooth count, tooth profile, sprocket width, and the position of the sprocket relative to the track frame. If the chain has been replaced previously, the current chain specification should be treated as the starting point.

I also inspect the condition of the track bushings and links. A new sprocket installed against a heavily worn chain may not deliver the expected service result because the worn parts can have a different contact profile. For this reason, sprocket replacement is often evaluated together with chain wear, roller condition, idler condition, and track tension.

Dimensions That Matter

Buyers often ask for the “CAT E320 sprocket dimensions,” but there is no single universal dimension set that I can safely apply to every E320 configuration. I recommend recording the sprocket outside diameter in millimeters (mm), the working width in millimeters (mm), the mounting-hole diameter in millimeters (mm), the bolt-circle diameter in millimeters (mm), and the tooth count. These measurements should be taken from the actual component or verified technical drawing.

For accurate measurement, clean mud and compacted material from the mounting face and tooth pockets first. Use a suitable caliper or steel rule for accessible dimensions, and use a bolt-circle measurement method appropriate to the number and arrangement of holes. If the sprocket is severely worn, I prefer combining measurements with the original part number and clear photographs because wear can make the original profile difficult to identify.

Types, Materials, and Design Considerations

Undercarriage sprockets are commonly produced from alloy steel or other steel grades selected for strength, toughness, and resistance to tooth wear. The useful material choice depends on the manufacturing route, heat-treatment process, tooth geometry, and the working environment. I avoid presenting a material name alone as proof of quality because performance depends on the complete production specification and inspection process.

You will get efficient and thoughtful service from Zhonghai Jiuchuan.

Design options may include a complete sprocket, segmented sprocket sections, or a configuration intended for a specific final-drive arrangement. The correct format depends on the machine and existing assembly. When requesting a quotation, I ask buyers to specify whether they need a complete component or a segment, and whether fasteners or related installation parts are required separately.

How I Select the Correct Replacement

Step 1: Define the Replacement Objective

First, determine whether the goal is to replace a broken sprocket, correct tooth wear, rebuild an undercarriage, or keep a spare in stock. A single-component replacement may be reasonable when the chain and mating components remain within acceptable condition. A broader undercarriage review is more appropriate when the machine shows uneven wear, chain elongation, damaged rollers, or repeated track-drive problems.

Step 2: Collect Technical Evidence

Record the machine identification, existing part number, tooth count, mounting information, and the key dimensions in millimeters. I also request photographs from multiple angles and information about the current track chain. If any value conflicts with the machine record, I pause the quotation process and ask for clarification rather than guessing.

Step 3: Compare the Supplier’s Technical Information

Before purchase, compare the supplier drawing or specification with the measurements you collected. Confirm the tooth profile, mounting pattern, overall width, offset, and intended application. A responsible supplier should be willing to explain which information supports the compatibility decision and which details still require confirmation.

Step 4: Review Installation Conditions

Check whether the final drive, bolts, track chain, and surrounding components are suitable for the replacement. The mounting surface should be clean and inspected for damage before installation. After fitting, the technician should follow the excavator manufacturer’s procedures for track tension, fastener tightening, and operational checks.

Common Buyer Mistakes

The most common mistake I see is ordering by machine name only. Another is copying a dimension from an online listing without checking whether that listing applies to the same model generation or track configuration. Buyers may also measure a worn sprocket and assume that every measured value represents the original design.

A further risk is replacing the sprocket while ignoring a severely worn track chain. Because the sprocket and chain operate as a contact system, the condition of one affects the other. I recommend asking the maintenance team to document the chain, rollers, idlers, and track tension before finalizing the order.

Pricing, MOQ, and Lead-Time Questions

Pricing depends on the confirmed design, material specification, production quantity, packaging, and shipping destination. I do not provide a universal price based only on the phrase “CAT E320 sprocket,” because an unverified quotation can create avoidable revision costs. For repeat buyers, I can discuss batch planning and spare-part stocking after the required configuration has been confirmed.

Minimum order quantity and lead time should be agreed before purchase, especially for distributors or fleet operators planning multiple machines. I recommend confirming whether the quoted lead time starts after drawing approval, technical confirmation, or payment. Packaging requirements, shipping marks, inspection documents, and replacement policy should also be included in the commercial discussion.

How Zhonghai Jiuchuan Supports B2B Buyers

At Zhonghai Jiuchuan, I focus on technical clarification before production or supply. My support can include reviewing machine information, comparing photographs with requested dimensions, confirming the required sprocket configuration, and preparing product information for distributor or fleet purchasing teams. Where the available evidence is incomplete, I state what remains unverified instead of making an absolute compatibility claim.

I also understand that buyers may need more than one component for an undercarriage repair. Depending on the confirmed requirement, I can help organize a sourcing discussion around sprockets and related undercarriage parts, including the information needed for a practical quotation. The final supply scope should always be based on the verified machine configuration and agreed technical details.

Key Takeaways and Next Steps

• Do not identify a CAT E320 sprocket by machine name alone.
• Confirm the machine serial information, current track chain, tooth count, mounting pattern, and critical dimensions in mm.
• Use at least 3 clear photographs to support technical review, while remembering that photographs do not replace measurements.
• Check chain, rollers, idlers, final drive, and track tension before installing a replacement sprocket.
• Ask the supplier to confirm the drawing, configuration, MOQ, lead time, packaging, and commercial terms in writing.

The correct CAT E320 undercarriage sprocket is the one that matches the installed track chain and final-drive arrangement, not simply one advertised under the same machine family. My recommended next step is to send Zhonghai Jiuchuan the machine identification information, sprocket photographs, measured dimensions, tooth count, and current chain details. With that evidence, I can help evaluate the appropriate replacement configuration and prepare a more reliable B2B quotation.

Are you interested in learning more about CAT E320 Undercarriage Sprocket? Contact us today to secure an expert consultation!