Our forged hardened track rollers (also named bottom rollers) are the core load-bearing undercarriage components for crawler excavators, bulldozers and other track-type construction machinery. Engineered for heavy-duty harsh working conditions, our track rollers deliver exceptional wear resistance, impact resistance and leak-proof performance, drastically reducing equipment downtime and maintenance costs for construction fleets, repair workshops and machinery parts distributors worldwide.
The roller body is forged from high-strength low-alloy steel, with an overall induction hardened outer surface reaching a stable hardness of HRC 52-58. This delivers 3× longer wear life than standard cast rollers, fully withstands frequent impact from rough, rocky terrain, greatly reduces replacement frequency and cuts your overall operating costs over the equipment lifecycle.
Our dual-sided sealed end covers adopt premium wear-resistant nitrile rubber oil seals paired with a labyrinth dustproof structure, which fully isolates internal bearings from external dirt, sand, water and construction debris. This design eliminates the most common track roller failure — oil leakage, prevents premature bearing damage, extends maintenance intervals and reduces your after-sales service workload for equipment fleets.
Each track roller is equipped with a quenched and tempered medium carbon steel inner shaft and high-carbon chromium bearing steel rolling bearings, ensuring ultra-smooth rotation under extreme heavy loads. This precision structure reduces abnormal wear of matched track chains, and keeps your equipment running stably on uneven, soft or muddy construction sites with minimal vibration and operational disruption.
Our track rollers are fully compatible with mainstream construction machinery models, including the Komatsu PC200 series excavators, as well as a full range of bulldozer and crawler excavator undercarriage systems. We also provide custom track rollers for non-standard models to meet your unique project and equipment needs.
A robust, long-lasting bottom roller consists of 4 core precision-engineered parts:
Thickened Cylindrical Roller Body: The direct contact component with track links and ground, with a reinforced thickened design for enhanced impact and wear resistance
High-Strength Fixed Inner Shaft: Quenched and tempered steel shaft fixed on the track frame, serving as the stable rotation axis of the roller body
High-Precision Rolling Bearings: Installed between the roller body and inner shaft, effectively reducing rotational friction even under sustained heavy loads
Dual Sealed End Covers: With an integrated oil filling port for convenient on-site lubrication, prevents internal oil leakage and external debris intrusion
Primary Load-Bearing: Bears the full weight of the machine’s upper structure, working device and operation loads, the fundamental function to ensure stable equipment operation
Superior Ground Adaptation: Rolls along with the track chain to adapt to uneven ground, reducing equipment vibration and bumping during movement to improve operator comfort and equipment stability
Track Support & Alignment: Supports the lower track chain to prevent sagging or deformation under heavy loads, avoids track derailment and unexpected costly downtime on job sites
Even Load Distribution: Distributes the machine’s concentrated weight across a larger ground contact area via multiple bottom rollers, reducing ground pressure and preventing equipment sinking on soft soil, mud and sand
We strictly control every production process to ensure the highest quality and longest service life of our track rollers, with rigorous material selection and standardized heat treatment:
Roller Body: Forged from high-strength low-alloy steel with excellent toughness, impact resistance and wear resistance. The outer contact surface undergoes full induction hardening and tempering, reaching a stable hardness of HRC 52-58, which maximizes surface wear resistance while retaining the internal toughness of the material to resist impact and cracking.
Inner Shaft & Bearings: The inner shaft is made of quenched and tempered medium carbon steel for exceptional strength and rigidity; bearings adopt high-carbon chromium bearing steel, lubricated with high-temperature and high-pressure resistant grease, adapting to extreme working conditions without performance degradation.
Sealing System: Composed of wear-resistant nitrile rubber and metal reinforcement rings, with a multi-layer labyrinth dustproof structure, ensuring long-term reliable sealing performance in high-dust, muddy and harsh construction environments.
Our forged track rollers are widely used for a full range of track-type heavy machinery, including:
Medium and heavy-duty crawler excavators, bulldozers
Crawler cranes, road milling machines and drilling rigs
Other track-type construction and mining machinery
Working scenarios: Civil construction sites, open-pit mining operations, forestry projects, highway and railway construction, municipal engineering and other harsh working environments.
Our track rollers are fully compatible with all mainstream global construction machinery brands, including but not limited to:
Komatsu Series: PC200, PC200-7, PC200-8, and full PC series excavators
Caterpillar, Hitachi, Kobelco, Doosan, Volvo and Hyundai series excavators and bulldozers
Custom models are available upon your provided drawings, samples or equipment specifications
Proper daily maintenance can effectively extend the service life of track rollers, reduce undercarriage failure rates and avoid costly unplanned equipment downtime:
Regular Leak Inspection: Check the seal of bottom rollers every 50 working hours for oil leakage (the most common track roller fault). Oil leakage will cause bearing oil starvation and rapid damage, so replace damaged seals immediately once detected.
Wear & Deformation Check: Inspect the roller body for uneven wear, pitting, cracking or bending deformation during routine equipment maintenance. Replace severely worn rollers in time to avoid uneven track wear and more costly undercarriage system damage.
Standard Lubrication Maintenance: Refill high-quality lubricating grease through the oil filling port every 300-500 working hours (per manufacturer specifications). Clean the oil port thoroughly before refueling to prevent debris from entering the internal bearing cavity.
Daily Debris Cleaning: Timely remove soil, gravel and other debris stuck between the rollers and track chain after each shift, to reduce additional friction and impact wear on the roller body and seals.
Operational Precautions: Avoid driving the machine over sharp rocks or metal obstacles at high speed, and reduce frequent sudden starts and stops to prevent premature wear of bottom rollers caused by severe impact and track slip.
As a professional manufacturer of construction machinery undercarriage parts with over [X] years of industry experience, we provide full-stack tailored services for global machinery parts distributors, repair workshops, construction fleet operators and project contractors:
Bulk Wholesale: Competitive tiered pricing for large quantity orders, ideal for long-term cooperative partners, with flexible minimum order quantities to support small batch trial orders for new partners.
OEM & Customization: We support OEM production with your brand labeling, and custom track roller manufacturing for non-standard models, special material requirements and unique working conditions. Our in-house engineering team provides one-to-one custom solutions to meet your exact specifications.
Global Logistics Support: We offer flexible sea, air and express shipping options to worldwide destinations, with professional anti-collision and rust-proof packaging to ensure product safety during long-distance transportation.
Reliable Quality Warranty: All our track rollers come with a [12-month] quality warranty, with free replacement for any confirmed quality defects under normal use and maintenance.
Track rollers (bottom rollers) are mounted on the lower track frame, bear the full weight of the machine, and make direct contact with the ground and track links. Carrier rollers (top rollers) are mounted on the upper track frame, only support the upper track chain to prevent excessive sagging, and do not bear the main load of the machine.
The outer contact surface of our forged track rollers undergoes full induction hardening and tempering, reaching a stable surface hardness of HRC 52-58. This hardness balance ensures exceptional wear resistance while maintaining the internal toughness of the steel to resist impact and cracking in harsh working conditions.
Yes, our forged hardened track rollers are fully compatible with Komatsu PC200 series excavators, including the PC200-7, PC200-8 and other common variants. We also manufacture track rollers for most mainstream excavator and bulldozer models from global leading brands.
We offer flexible minimum order quantities for our track rollers. We support small batch trial orders for new cooperative partners, as well as large bulk wholesale orders for long-term distributors and fleet operators.
Our track rollers are designed with a dual-layer sealing system to prevent oil leakage from the source. For daily use, you should regularly inspect the seals for damage, avoid overloading the equipment, clean debris around the rollers after each shift, and refill lubricating grease strictly in accordance with the recommended maintenance schedule.
