HITACHI Excavator Undercarriage Spare Parts Heavy Duty Bottom Track
Rollers Replacement For EX800
1. What is a Track Roller?
As a core component of belt conveyors, the roller comes in diverse types and large volumes, serving to
support the conveyor belt and bear the weight of transported
materials. It accounts for 35% of a belt conveyor’s total cost
while contributing to over 70% of the conveyor’s total
resistance—making its quality critically important. Rollers are
primarily available in two materials: steel and plastic.
For track rollers, the choice of material—40Mn2, 40MnB, or 50Mn—depends on specific operating conditions. These rollers undergo precision forging followed by normalization, prior to full heat treatment. This rigorous process achieves a surface hardness of HRC 52–56, with a hardened layer depth of over 7–10mm (maintaining HRC 45 at the layer core). The result is exceptional durability: the rollers deliver strong impact resistance and superior surface wear resistance at their contact points, even under heavy loads. To adapt to
varying climates and temperatures, we integrate high-performance floating seals and a specialized lubrication system. This design enables both track rollers and carrier rollers to
operate reliably in harsh working environments or climates, with a
temperature range of -45℃ to 120℃, while ensuring the components remain maintenance-free.
2. Track Rollers Excavator Features
Our track rollers undergo specialized quench-tempering processes,
which hone their mechanical properties to excellence—delivering
high tensile strength, superior resistance to bending and breakage,
and enhanced wear resistance. This ensures they maintain peak
performance even under the intense stress of heavy-duty operations.
We take immense pride in the quality of our track rollers. By
combining advanced heat treatment techniques, empirical expertise
honed in mining applications, and premium floating seals and
bearings, we craft heavy-duty track rollers that stand out for
exceptional durability—engineered to thrive in the harshest working
environments.
Our track rollers are built for longevity, thanks to the synergy of
precision-engineered components, meticulous heat treatment, and a
lifetime sealing system. Their shells, forged from deep-hardening
steel, are specifically designed to resist bell mouthing—a common
culprit behind premature failure. Every roller is backed by a
manufacturer’s warranty, offering added assurance for your
equipment’s reliability.

3. Track Roller Structure

4. Main Dimensions of Installation

MAIN PARAMETERS
Brand | Model | Main Dimensions of Installation |
A | B | E | G | M | L |
HITACHI | EX30 | 108 | 85 | 112 | 172 | | |
EX60-1 | 145 | 120 | 152 | 248 | 218 | 15 |
EX60-2/3 | 145 | 120 | 152 | 248 | 216 | 15 |
EX60-5 | 135 | 112 | 140 | 227 | 197 | 15 |
EX100 | 160 | 135 | 184 | 285 | 250 | 17.5 |
EX120 | 160 | 135 | 184 | 285 | 250 | 17.5 |
EX150-1 | 170 | 140 | 200 | 304 | 267 | 17 |
EX200-1 | 185 | 180 | 220 | 356 | 318 | 18 |
EX200-2 | 185 | 150 | 218 | 330 | 290 | 19 |
EX200-2B | 195 | 160 | 218 | 330 | 290 | 19 |
EX220-1 | 195 | 160 | 218 | 360 | 325.4 | 17 |
EX270-1 | 215 | 180 | 256 | 410 | 368 | 21.5 |
EX300-2/3 | 215 | 180 | 256 | 410 | 368 | 21.5 |
EX355 | 215 | 180 | 256 | 410 | 368 | 21.5 |
EX400-3/5 | 215 | 180 | 256 | 410 | 368 | 23.5 |
EX450-5 | 240 | 200 | 284 | 447 | 400 | 23.5 |
UH052 | 170 | 140 | 200 | 304 | 267 | 17 |
UH07 | 185 | 150 | 220 | 356 | 318 | 18 |
UH083 | 170 | 140 | 200 | 304 | 267 | 17 |
The models above are just for reference, many models we can't list
here.we can supply more products as your requirement. Please feel
free to send us your inquiry or email if you have any requirements.
5. Production Process

6. Our Advantages
* World-class quality
* Factory sale directly with reasonable price
* 35 years' experience in Excavator & Bulldozer spare parts
manufacturing
* Flexible payment terms including T/T, L/C and so on
* Fast delivery within 30 days after contract established
* Professional sales team, quality inspection, and report, maritime
logistics guidance
* After-sale services: video technical support,24h online support
7. Hot Sale Products
