-
-
ApplicationOur products consist of undercarriage parts for bulldozer and excavator such as Track link,Track roller,Carrier roller,Sprocket,ldler,Track shoe,Cutting edge,End bit,Tooth Bucket,Track pin,Track bush, Engine parts,Track boit&nuts.U-bolt,Centre bolt,Wheel bolt and other related parts.
-
About UsFujian Yongsheng Machinery Parts Co., Ltd. is located in Quanzhou City, Fujian Province, which is one of the most developed regions of China Machinery Manufacturing.The company was established in 2003, after approximately 10years' effort, and now it is one of the leading construction machinery parts auto parts manufacturers in CHINA.
-
BlogSuppliers who pass Quality ManagementSystem Certification, and have onsitematerials or finished products inspected,as certified by independent third parties.
Mitigating Undercarriage Failures: How Advanced Metallurgy and Heat Treatment Extend Crawler Lifespan
Mitigating Undercarriage Failures: How Advanced Metallurgy and Heat Treatment Extend Crawler Lifespan
Jul 06,2026
For fleet managers and heavy equipment operators, the crawler undercarriage is the ultimate wear-intensive assembly. Operating in high-abrasion environments like mining, demolition, and heavy excavation, track components face constant threats from severe impact and structural fatigue. Sudden field failures do not just disrupt project timelines; they drive up the total cost of ownership. Maximizing machine uptime requires a deeper understanding of why undercarriage parts fail and how specialized manufacturing processes can prevent them. Since 2003, Fujian Yongsheng Machinery Parts Co., Ltd (YSM) has been engineering solutions to these industry bottlenecks from Quanzhou City, Fujian Province, delivering high-durability parts under strict ISO9001 and ISO14001 systems to demanding markets in the USA, Canada, UK, Singapore, Russia, and Brazil.
The first major challenge in undercarriage longevity is preventing structural cracking and chipping under high-stress shock loads. When a bulldozer or excavator travels over uneven rock, the track links and shoes absorb immense impact forces. Standard carbon steels often fail due to internal defects like sand inclusions or micro-voids trapped during casting. To solve this, YSM utilizes high-grade 35MnB and 40Mn2 boron steel for track chains, ensuring a clean, uniform chemical melting process that eliminates internal weak points. Furthermore, we apply an advanced whole-component quenching and tempering process. This creates a highly resilient core matrix topped with an intense surface induction hardening that reaches a depth of 5 to 8 millimeters with a hardness of HRC 52-58. For track shoes, upgrading to premium 25MnB steel hardened to HRC 42-49 guarantees the perfect balance of surface toughness and high bending resistance, keeping the track grounded without structural failure.
The second critical issue is excessive chain stretching and track pitch elongation, which accelerates sprocket tooth wear. This problem stems directly from high friction at the joint where the track pin rotates inside the bush. If the heat-treatment layer is too shallow, the hardened case wears away quickly, leading to rapid joint play and sprocket misalignment. YSM addresses this wear cycle by pushing the heat-treatment depth deeper into all rotational contact zones. Our track rollers, carrier rollers, and front idlers—forged and specially cast from robust 40Mn, 45Mn, and 50Mn steel—receive localized induction hardening that penetrates 5 to 10 millimeters deep into the wear profile, maintaining a reliable HRC 50-56 rating. Additionally, our sprockets and segments are precision cast from 35Mn2 and 50Mn alloy steel, featuring an ultra-deep tooth profile hardening up to 12 millimeters. This extended wear case ensures the drive teeth maintain their original geometric profile under continuous rotation, delivering 2,000 to 5,000 reliable working hours even in worse environments.
The final and most costly failure mode is oil leakage within the roller shell, which leads to immediate internal seizure. Keeping lubricants locked inside a heavy roller operating under thousands of tons of pressure requires extreme setting precision. At YSM, CNC machining delivers micron-level tolerance for all internal sealing seats, track pins, and bushes. This ultra-tight machining precision ensures that components align perfectly, neutralizing the excessive vibration that destroys seals. To seal the assembly permanently, our roller frames feature perfectly ground mirror-finished seats paired with premium heavy-duty duo-cone seals. This architecture forms a nearly zero-leakage, airtight barrier that seals high-performance oil inside while completely repelling destructive external mud, water, and sand. Backed by over 30 years of technical expertise, YSM undercarriage parts provide global operators with the precise engineering needed to eliminate machine downtime and lower hourly operating costs.
Official Website: www.fj-ysm.com
Related Posts
How Should The Supporting Wheels Be Selected To Avoid Stepping On Thunder?
High-quality support wheels mainly depend on the performance of its steel. The material of the roller body is generally 50Mn, 40Mn2, (MN: synonymous with the element of manganese).
Carrier Wheels Are Suitable For Various Models At Home And Abroad
Sprocket wheels are mainly used in various crawler bulldozers, excavators, pavers, milling machines, rotary drilling rigs or other crawler machinery equipment at home and abroad.
Contact Us
E-mail :
sales@china-ysm.com
Phone/WhatsApp：
+86-18606961587
Address：
No.8 Binjiang Street, Binjiang Industrial Zone, Xiamei Town, Nan An City, Quanzhou City, Fujian Province, China
Request Quote
Andy Shi
No.8 Binjiang Street, Binjiang Industrial Zone, Xiamei Town, Nan An City, Quanzhou City, Fujian Province, China
Request Quote