50Mn Steel HRC 40-55 OEM Replacement Track Bottom Roller for CAT 320 330 Excavator Undercarriage Parts

The YT brand single flange track bottom roller provides a premium OEM replacement solution for Caterpillar 320 and 330 series hydraulic excavators, the most popular 20-30 ton class machines in the global construction equipment market. CAT 320 and 330 excavators are the benchmarks for reliability and productivity, and our YT undercarriage components are manufactured to meet these exacting standards. Each roller is forged from premium 50Mn steel and precision-machined to replicate OEM dimensional specifications. Induction hardening on the tread surface achieves HRC 40-55 with a uniform 4-10 mm effective case depth. The sealed lifetime-lubricated double-tapered roller bearing system provides maintenance-free operation and superior contamination protection. With 35 years of undercarriage manufacturing expertise and ISO 9001:2008 certification, YT YinTai Parts delivers OEM-comparable quality at significant cost savings for Caterpillar equipment fleets worldwide.

• Single flange design precisely engineered to match CAT 320 and 330 excavator track frame specifications
• Forged 50Mn steel construction with controlled metallurgical properties for consistent wear and impact resistance
• Induction hardened tread surface at HRC 40-55 with 4-10 mm uniform case depth for predictable service life
• Precision-ground tread profile with optimal surface finish for low rolling resistance and smooth operation
• Lifetime-lubricated sealed double-tapered roller bearing with advanced floating seal for zero maintenance
• Direct OEM replacement compatible with CAT 320B, 320C, 320D, 320E, 330B, 330C, 330D, and 330 GC models
• Durable anti-corrosion coating system designed to match CAT equipment appearance and environmental durability

YT YinTai Parts operates a fully integrated manufacturing facility in Quanzhou, Fujian, China, spanning over 20,000 square meters. Our track bottom rollers undergo a rigorous production workflow: raw 50Mn steel inspection and cutting, precision forging or casting using 800-ton presses, CNC machining for exact dimensional accuracy to within ±0.02mm tolerance, heat treatment through induction hardening achieving HRC 40-55 surface hardness with 4-10mm hardened depth, precision grinding, shot blasting for surface finish, rigorous quality inspection including ultrasonic flaw detection and dimensional verification, anti-corrosion coating application, and final assembly with sealed lifetime-lubricated bearings. Each roller passes a 100% load testing protocol before shipment.

YinTai Parts (YT Brand) has served the global undercarriage parts market for over 35 years. Our factory in Quanzhou, Fujian Province, houses advanced CNC machining centers, automated forging lines, and in-house heat treatment facilities. We hold ISO 9001:2008 certification and CE marking, ensuring compliance with international quality and safety standards. Our engineering team of 50+ technical professionals continuously improves product designs using finite element analysis and fatigue testing. We export to over 60 countries across Asia, Europe, Africa, the Middle East, and the Americas, with an annual production capacity exceeding 120,000 track rollers. Our OEM and aftermarket replacement parts are trusted by construction companies, mining operations, and equipment dealers worldwide.

YT track bottom rollers for Caterpillar 320 and 330 excavators serve the broadest range of construction and industrial applications in the global equipment market. CAT 320 and 330 excavators are deployed in general construction, heavy civil engineering, road building, pipeline installation, demolition, material handling, forestry, and quarry support operations. As the world most popular excavator platform, CAT 320/330 machines operate in virtually every country and climate, from Arctic conditions in Canada and Russia to desert environments in the Middle East and tropical regions in Southeast Asia. YT aftermarket rollers support CAT equipment owners across this global footprint by providing reliable, cost-effective undercarriage replacement parts that maintain the productivity and reliability their businesses depend on. Our extensive production capacity of 10,000 pieces per month ensures consistent supply for fleet operators and parts distributors worldwide.

Q1: Are YT bottom rollers true OEM replacement quality for Caterpillar 320 and 330 excavators?
A1: Yes, our YT-CAT320-330-SF bottom rollers are manufactured to OEM-equivalent specifications for dimensional accuracy, material properties, and heat treatment. Our ISO 9001:2008 certified facility with 35 years of undercarriage manufacturing experience ensures consistent quality across every production batch.

Q2: What CAT 320 and 330 model generations are compatible with YT replacement rollers?
A2: Our rollers are compatible with CAT 320B, 320C, 320D, 320D2, 320E, 320 GC, 320 Next Gen, 330B, 330C, 330D, 330D2, 330 GC, and 330 Next Gen models. This broad compatibility covers the most popular CAT excavator models from the late 1990s to current production.

Q3: How much cost savings can I expect versus genuine Caterpillar bottom rollers?
A3: YT aftermarket bottom rollers typically provide 40-60% cost savings compared to genuine Caterpillar OEM parts while delivering comparable performance and service life. This represents significant lifecycle cost reduction for fleet owners managing multiple CAT excavators.

Q4: Do YT rollers carry the same warranty as OEM Caterpillar parts?
A4: We provide a 12-18 month warranty covering manufacturing defects and premature wear under normal operating conditions. Our warranty terms are competitive with aftermarket industry standards and provide peace of mind for equipment owners transitioning from OEM to quality aftermarket parts.

Q5: Can YT supply CAT 320 and 330 undercarriage parts for urgent breakdown situations?
A5: Yes, we maintain stock of popular CAT 320/330 bottom roller models for immediate dispatch. Emergency orders can be shipped via air freight with delivery to most international destinations within 5-10 business days to minimize machine downtime.

Q6: Are YT aftermarket rollers approved for use on Caterpillar machines under warranty or service contracts?
A6: YT aftermarket rollers are recommended for out-of-warranty machines and as a cost-effective alternative to OEM parts. For machines under active Caterpillar warranty or extended service contracts, we recommend checking your specific agreement terms regarding aftermarket component usage.

All YT track bottom rollers are packaged in export-grade materials for maximum protection during transit. Standard packaging includes individual plastic wrapping, foam cushioning, and sturdy wooden pallets or plywood cases. Custom packaging options are available upon request including branded boxes and bulk packaging. Our products carry a warranty period of 12-18 months from the date of shipment, covering manufacturing defects and premature wear under normal operating conditions. Warranty claims are processed within 15 business days with photographic evidence and failure analysis. We provide full technical support and replacement parts for any warranty-covered issue.