Heavy Duty Bottom Track Rollers with 7-10mm Hardened Layer Depth and Precision Forging for HITACHI EX800 Excavator Undercarriage Parts

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.

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.

• 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.
• We combine advanced heat treatment techniques, empirical expertise honed in mining applications, and premium floating seals and bearings to craft heavy-duty track rollers that stand out for exceptional durability.
• Our track rollers are built for longevity, thanks to the synergy of precision-engineered components, meticulous heat treatment, and a lifetime sealing system.

The models above are just for reference. We can supply more products as per your requirements. Please feel free to send us your inquiry or email if you have any specific needs.

• World-class quality
• Factory direct sales with competitive pricing
• 35 years' experience in Excavator & Bulldozer spare parts manufacturing
• Flexible payment terms including T/T, L/C
• Fast delivery within 30 days after contract established
• Professional sales team, quality inspection, and maritime logistics guidance
• Comprehensive after-sale services including video technical support and 24h online assistance