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FAQ

We provide a 12-month warranty for all undercarriage components.

There is no minimum order quantity for standard products; orders can be placed even for single units.

Yes. We can produce custom heavy equipment parts based on detailed technical drawings or specifications provided by the customer.

All undercarriage components are manufactured strictly according to OEM specifications with 1:1 dimensional accuracy.

Yes. Our manufacturing processes are certified under ISO 9001:2015 (Quality Management System), ISO 14001:2015 (Environmental Management System), and ISO 45001:2018 (Occupational Health and Safety Management System).
About Our Products

Track Rollers

We provide a 12-month warranty for all undercarriage system components.

There is no minimum order quantity for standard products, orders can be placed even for small or single-unit quantities.

Yes. We can produce customized components based on detailed technical drawings or samples provided by the customer.

All undercarriage parts are manufactured strictly according to OEM 1:1 dimensions and technical specifications to ensure full compatibility.

Yes. We supply replacement track rollers for a full range of Komatsu equipment, including both excavators and bulldozers.

You can provide your equipment model number or the part number from your existing components. Based on the information you provide, we will supply corresponding technical drawings and specifications to verify full compatibility before production.

Our Komatsu track rollers are produced using forged 40MnB2 high wear-resistant boron steel for the roller body and forged 42CrMo alloy steel for the center shaft. The surface is heat-treated to a hardness of HRC 48-55, ensuring excellent wear resistance and fracture toughness.

Countries such as Japan, South Korea, and China are major production centers for Komatsu undercarriage parts. Japanese-made parts typically offer excellent quality but come at a higher price, while Chinese-manufactured parts offer a wider variety of models with strong cost-performance advantages.

For most of our Komatsu undercarriage parts, detailed design drawings and specifications are available. If you cannot find a matching part, simply provide the model or part number, and we will assist you in identifying the correct component.

All Komatsu rollers undergo a strict quality control process conducted by our professional inspection team. Both semi-finished and finished products are thoroughly tested to ensure dimensional accuracy, stable performance, and reliable quality prior to shipment.

Yes. We offer remote technical support via online and video channels, and can dispatch technical personnel on-site when necessary to ensure proper installation, smooth operation, and long-term equipment reliability.

You may select parts based on your machine brand and model. If you're unable to locate the specific product, simply provide your equipment's OEM part number. Based on the information, we will supply corresponding technical drawings and dimensions for verification, including roller diameter, shaft size, and bolt hole spacing.

The roller body and center shaft are produced using forged 40MnB2 high wear-resistant boron steel and 42CrMo alloy structural steel to ensure superior strength and durability.

We supply high-quality aftermarket replacement parts for Caterpillar equipment, strictly manufactured to OEM (1:1) specifications to ensure full compatibility and service life. For equipment manufacturers seeking OEM-capable suppliers, we offer complete in-house production capabilities, including mold development, precision manufacturing, and large-scale production, supported by over 20 years of undercarriage manufacturing expertise.

We provide a 12-month warranty along with comprehensive after-sales support.

Our track rollers undergo a complete range of surface treatments to enhance hardness and wear resistance, including annealing, normalizing, quenching, tempering, hardening & tempering, aging, carburizing, and nitriding processes.

Yes. Our use of premium alloy structural steels, forged high wear-resistant boron steel, advanced heat treatments, and strict quality control ensures that the track rollers maintain reliable performance even in extreme mining and heavy-duty environments.

The surface hardness reaches HRC 48-55 with a hardening depth of 8-10mm, using forged 40MnB2 and 42CrMo steel to deliver outstanding wear resistance and durability.

Yes. The rollers incorporate pure copper bushings to enhance wear resistance and are equipped with high-density sealing rings to effectively protect internal components from dust, sand, and moisture.

Yes. We offer heavy-duty track rollers specifically designed for coal mining bulldozers, manufactured from high-strength forged steel and equipped with advanced sealing systems to prevent damage from dust, mud, and debris, ensuring long-term durability even in harsh mining conditions.

You can provide your equipment model or part serial number. Based on your information, we will offer technical drawings and detailed dimensions to verify proper fitment before production.

Yes. Our Hitachi aftermarket track rollers are manufactured to high standards using 1:1 original dimension, with strict quality control processes in place. Built with high-strength forged steel, they deliver durability and consistent performance equivalent to OEM parts.

Absolutely. These rollers are designed for severe conditions in mining and construction environments, using forged high-strength steel and precision heat treatment to ensure durability under rugged terrain, heavy loads, and exposure to dust, sand, and mud.

Our Hitachi track rollers are made from forged 40MnB2 or 42CrMo steel for the roller body, heat-treated to HRC 48-55 for superior wear resistance. The center shaft uses forged 42CrMo alloy steel, combining wear resistance with fracture toughness.

  • Forged from 40MnB2 or 42CrMo steel, heat-treated to HRC 48-55 for excellent wear resistance.
  • Equipped with high-density seals for effective protection against dirt, sand, and water intrusion.
  • Manufactured with strict 1:1 dimensional accuracy and fully inspected for quality consistency.
  • Comparable in quality to OEM, while offering better pricing for cost-effective replacement.

  • Regularly clean the undercarriage to remove dirt, rocks, vegetation, and debris.
  • Avoid frequent operation on slopes exceeding 30 degrees to prevent uneven stress on undercarriage components.
  • Park equipment on flat, stable ground to reduce long-term stress on track components.
  • Periodically inspect for signs of wear or oil leakage.

Yes. Our technical team can develop customized rollers based on drawings, specifications, or physical samples provided by the customer.

Yes. We provide full installation support through online, video, or remote assistance, and can dispatch technical personnel on-site if needed to ensure proper installation and long-term operational reliability.

Yes. All Hitachi replacement track rollers are manufactured with exact 1:1 dimension to ensure full compatibility. We do not reduce dimensions or material standards to cut costs, ensuring consistent quality and performance.

Yes. Our Volvo track rollers are manufactured with 1:1 precision dimensions, fully matching the original equipment without reducing size or material standards.

The roller body is made from forged 40MnB2 high-strength steel, heat-treated to HRC 48-55. The center shaft uses forged 42CrMo steel with surface hardening for superior core strength, minimizing the risk of bending or fracturing under load.

Yes. Our track rollers are built from high-strength forged materials with hardened surfaces, supported by strict quality control to ensure consistent performance in harsh environments such as coal mining, quarrying, and large-scale construction sites.

You can send us your machine model or part number. Our team will provide technical drawings and measured dimensions to verify compatibility before production.

Yes. We provide high-quality aftermarket replacement parts manufactured to OEM-level standards. For equipment manufacturers, PT'ZM also offers full OEM production capability with over 20 years of experience, covering mold development, precision manufacturing, and large-scale production.

Yes. All rollers are equipped with high-density sealing rings and brass bushings, effectively protecting internal components from dust, sand, and moisture contamination.

Yes. We offer full installation assistance through online, video, and remote technical support, and can dispatch technical personnel for on-site guidance when necessary.

We provide a standard 12-month warranty on all track rollers. For bulk purchases, centralized after-sales service is available to help maintenance teams manage replacements and service efficiently.

Yes. If you provide the original part number, samples, or detailed dimensions, we can produce fully compatible replacement rollers. Our engineering team ensures that all new parts match the original in size, material, and performance.

Yes. We offer complete undercarriage roller sets, including track rollers, carrier rollers, idlers, and sprockets for various excavator and bulldozer models. This helps simplify procurement and ensures optimal undercarriage system performance.

Carrier Rollers

Yes. Our excavator carrier rollers are manufactured according to the original specifications for major brands such as Caterpillar, Komatsu, Hitachi, and Volvo, following strict 1:1 dimensional standard to ensure proper fitment across various models.

Yes. Our carrier rollers are made from forged 40MnB2 steel, with surface hardness reaching HRC 48-55 and a hardening depth of 8-10mm. These rollers are highly suitable for demanding mining operations, including coal mining, gold mining, and quarrying, where maximum durability is required.

Yes. We use precision CNC-machined pure copper bushings combined with hardened 42CrMo shafts to reduce friction and wear. This combination extends service life even under extreme working conditions.

Yes. We offer complete undercarriage kits, including carrier rollers, track rollers, idlers, and other undercarriage components. This helps ensure full compatibility and reduces both procurement and maintenance costs.

Yes. We support custom manufacturing based on samples or technical drawings provided by service centers or repair shops, ensuring precise dimensional and material matching for replacement parts.

Yes. We accept bulk orders and provide centralized after-sales support, making it ideal for large repair companies or distributors that require reliable logistics, consistent inventory, and warranty service management.

Yes. Our Komatsu replacement carrier rollers are designed and manufactured with 1:1 dimensional accuracy, using high-grade alloy steel and precision heat treatment to meet demanding operational requirements across various working conditions.

Our Komatsu carrier rollers are made from forged 40MnB2 steel for the roller body, heat-treated to a surface hardness of HRC 48–55 with a hardening depth of 8–10mm for outstanding wear resistance. The center shaft is forged from 42CrMo steel, heat-treated for high strength and excellent fracture resistance.

Yes. Our Komatsu carrier rollers are engineered specifically for harsh mining environments. With high-strength forged steel, deep heat treatment, and advanced sealing systems, they provide reliable performance even in extreme conditions like coal mines, stone quarries, gold mines, and other abrasive terrains.

Yes. We fully support bulk orders for Komatsu carrier rollers, which are ideal for mining companies and construction contractors managing large fleets of heavy equipment.

Yes. All Komatsu replacement parts undergo a range of heat treatment and surface hardening processes such as annealing, normalizing, quenching, tempering, hardening & tempering, aging, carburizing, and nitriding to achieve maximum durability and wear resistance.

Yes. If you provide old part samples or OEM part numbers, we can identify specifications and prepare detailed technical drawings for confirmation. We also accept production orders based on your technical drawings and dimensional data.

Yes. Our Komatsu replacement carrier rollers feature precision copper bushings for improved wear resistance and heat dissipation. The rollers also incorporate high-density sealing rings to prevent dust, sand, and water intrusion, ensuring stable performance even in severe working environments.

Yes. Our Caterpillar carrier rollers are produced with 1:1 dimensional accuracy and follow strict material and structural standards, fully matching OEM specifications to ensure proper installation and reliable operation.

We manufacture Caterpillar carrier rollers using forged 40MnB2 high-strength steel for the roller body, combined with a 42CrMo alloy steel center shaft. The rollers feature pure copper bushings and high-density sealing rings, providing excellent wear resistance and internal protection against contamination.

Yes. Our Caterpillar carrier rollers are specifically designed to perform under high impact, heavy dust, and high humidity conditions found in mining environments. With surface hardness up to HRC 48–55 and advanced sealing systems, the rollers maintain stable performance even under severe working conditions.

Yes. The carrier rollers are fully sealed and capable of operating in muddy, uneven, and dusty outdoor environments often encountered in forestry and off-road construction.

Frequent track dislocation may indicate mechanical issues. Possible causes include:

  • Tension cylinder failure
  • Severe track wear
  • Track shoe wear
  • Sprocket ring wear caused by chain damage
  • Damaged track rollers, carrier rollers, or sprockets
  • Idler or roller failures

Not necessarily. Occasional dislocation may occur due to mud, rocks, or improper operation, but persistent dislocation requires a mechanical inspection.

Damaged carrier rollers may cause uneven travel, reduced power, and machine drift, affecting overall undercarriage stability.

  • Regularly lubricate rollers
  • Avoid prolonged parking in muddy or wet environments
  • Clean accumulated dirt after operation
  • Keep the undercarriage clean and dry, especially during winter seasons

For Caterpillar bulldozers such as the D9, D10, and D11 series, the chain seals typically last around 4000 working hours under normal conditions.

As operating hours approach 4000 hours, seals may begin to leak, leading to dry friction on coupling pins. It’s recommended to replace the seals before excessive wear occurs to maintain full undercarriage service life.

Yes. Our product range covers full undercarriage components, including track rollers, carrier rollers, idlers, sprockets, track chains, and track shoes. We supply carrier rollers for multiple Hitachi excavator models such as EX200 (medium excavator), EX300, EX1200 (mining-class excavator), and EX2600 (250-ton ultra-large hydraulic excavator).

Absolutely. Our Hitachi carrier rollers are available as standalone replacements with precise OEM dimensional matching, allowing you to replace individual components without replacing the full undercarriage system, saving both time and cost. We also provide technical assistance for model selection if needed.

Yes. We use equal or superior materials compared to OEM parts, including high-strength alloy steel, precision heat treatment, and strict manufacturing control. With over 30 years of experience in undercarriage system production, we are capable of delivering aftermarket components that offer outstanding wear resistance, impact strength, and long-term durability even in extreme applications.

  • OEM parts are produced directly under Hitachi’s proprietary specifications, ensuring compatibility, precision, and full compliance with strict quality standards. However, OEM parts typically come with higher pricing and longer lead times.
  • Aftermarket parts offer a more affordable, readily available solution. Our carrier rollers are made using forged 40MnB2 high wear-resistant boron steel and 42CrMo alloy steel, with surface hardness reaching HRC 48–55, providing excellent durability even in severe operating conditions.

We strictly follow 1:1 dimensional standard for all critical measurements, including installation dimensions, tolerances, and material specifications. Our in-house inspection team performs thorough semi-finished and finished product testing, following standardized quality control procedures to ensure dimensional consistency and performance reliability.

Yes. We fully support bulk orders for fleet maintenance, helping minimize downtime due to undercarriage failures. All bulk production batches are controlled under strict quality management, ensuring consistent performance and uniformity across all parts.

Yes. Our carrier rollers are equipped with high-sealing systems specifically designed for muddy, wet, and dusty working environments common in mining and construction. These seals prevent contamination, extend bearing life, reduce maintenance frequency, and ensure stable machine performance under heavy loads and challenging site conditions.

Our Volvo replacement carrier rollers are built with high-strength forged steel and advanced sealing technology. They are designed for reliable operation in heavy-duty environments such as dusty construction sites, wet job sites, and rugged mining operations.

Yes, all of our Volvo aftermarket undercarriage rollers are equipped with high-performance sealing systems to prevent mud, debris, and moisture from penetrating the internal structure. This makes them ideal for use in muddy, wet, and high-contamination environments like mining and off-road construction.

Absolutely, we support bulk orders with centralized after-sales management, offering a cost-effective solution for fleet operators. By stocking high-quality undercarriage parts, you can minimize downtime caused by wear or component failure and keep your fleet running efficiently across large-scale operations.

Yes, we manufacture aftermarket components that meet OEM specifications and also offer custom ODM services based on your specific design requirements. Whether you are an equipment manufacturer or parts distributor, we can provide tailored support to match your needs.

Our aftermarket carrier rollers are produced using premium forged round steel and precision-cast materials, ensuring strength and resilience in high-load applications such as mining. All parts undergo strict quality inspections at every stage, from raw material to finished product, to guarantee consistent reliability and long service life.

We manufacture all carrier rollers to match OEM dimensions on a 1:1 scale. Simply provide your equipment model or OEM part number, and we’ll supply corresponding technical drawings and measurements for verification. Our technical team is also available to assist with compatibility checks to ensure the parts fit your equipment precisely.

Yes, we offer installation guidance both online and offline, including video instructions. When needed, we can dispatch technicians to provide on-site support, ensuring optimal product performance and a seamless user experience.

Idlers

If the contact surface between the track chain and the idler begins to thin or the hardened surface layer has worn off, it indicates that the idler has reached or is nearing the end of its service life. Timely replacement is recommended to prevent further damage.

There is no minimum order quantity for standard products, orders can be placed even for small or single-unit quantities.

Yes. We can produce customized components based on detailed technical drawings or samples provided by the customer.

All undercarriage parts are manufactured strictly according to OEM 1:1 dimensions and technical specifications to ensure full compatibility.

Yes, we supply idlers for various Komatsu models from 20-ton and 30-ton excavators to 80-ton and ultra-large 300-ton mining machines. You can verify compatibility by matching your OEM part number or confirming dimensions via technical drawings.

We use premium alloy steel such as 35SiMn for the idler body and 42CrMo forged steel for the shaft. Components undergo surface hardening up to HRC 55–58 to ensure durability in high-impact environments like mining, quarrying, and coal excavation.

Thanks to high-strength material selection, precision manufacturing, and thorough heat treatment, our idlers withstand high-load, high-dust, and high-shock conditions with consistent wear resistance and extended service life.

Yes, idlers can be replaced independently as long as other undercarriage components remain in good condition.

Absolutely, we provide competitive pricing for bulk orders and streamlined after-sales support. This helps reduce equipment downtime in large-scale mining or construction projects and ensures efficient maintenance across machine fleets.

After daily operations, it’s essential to remove accumulated dirt, sand, and gravel from the tracks, carrier rollers, track rollers, and sprockets. Pressure washing key components helps reduce abrasive wear caused by embedded debris.

Proper lubrication is critical to minimizing friction and maximizing lifespan. Follow Komatsu's maintenance schedule and use suitable lubricants such as GL-5 140-grade gear oil or equivalent for optimal results.

For areas with excessive gravel or rough terrain, slightly loosening the track tension can improve flexibility and reduce the risk of obstruction. Be sure to clean out any debris after operation to prevent buildup that can affect performance.

Yes, we support both OEM and ODM manufacturing. Simply provide a drawing or sample, and our engineering team can deliver customized Caterpillar-compatible idlers designed to meet specific operating requirements. Branding and structural optimization support are also available.

Our Caterpillar aftermarket idlers provide the same dimensional accuracy and performance as OEM parts, but at a more competitive cost. Every unit is manufactured to exact 1:1 specification for seamless installation and optimal functionality, giving you quality without compromise.

  • Regular inspections are essential to detect wear, damage, or misalignment early
  • Keeping the undercarriage clean helps prevent accelerated wear from debris and abrasive materials
  • Proper lubrication at scheduled intervals preserves performance and extends component life
  • Track tension must be adjusted to suit different terrains to avoid unnecessary stress
  • Overloading should be avoided, as it increases strain on the entire undercarriage system and shortens service life

Provide us with your equipment model or the OEM part number, and our technical team will recommend a compatible replacement. We'll supply technical drawings and key dimensions to ensure a precise fit.

Our Caterpillar idlers are produced using forged high-strength steel and precision-cast components. Each part undergoes strict in-process and final inspections. With carefully selected materials and advanced heat treatment processes, our idlers are engineered to withstand the harsh demands of mining and construction environments, delivering long-term durability and consistent performance.

Yes, we supply idlers designed for the Hitachi EX2600, built for use in mining and other high-impact operations. These idlers are forged from high-strength steel, undergo precision casting, and are heat treated to withstand continuous heavy loads and aggressive conditions.

You can provide the model or serial number of your heavy equipment, or the OEM number marked on your existing idler. Our technical team will verify the specifications based on original blueprints to ensure the part matches your machine precisely.

Yes, we offer design drawings for reference, and additional detailed specifications can be provided upon request by contacting our support team.

Absolutely, our engineering department is available to assist with new product development. We require your drawings, detailed dimensions, or physical samples for reference, and we will collaborate with you to create undercarriage components tailored to your equipment and operating conditions.

Our Volvo mining idlers are made from high-strength forged or precision-cast steel and built to withstand the abrasive wear and heavy impact typically encountered in large-scale mining operations.

Our demolition-grade Volvo idlers are reinforced with thickened rims, deep surface hardening (HRC55–58), and 40CrMo steel shafts. These features absorb intense shock and reduce the risk of cracking or deformation during extreme demolition tasks.

Our forestry-grade idlers are equipped with upgraded sealing systems and high-performance lubricating oil (GL-5W/140), offering superior resistance to mud, water, and debris, and ensuring reliable operation in challenging forest environments.

Each Volvo road construction idler is CNC-machined for precision fit and made from premium alloy steel with wear-resistant properties. These idlers perform reliably on compacted surfaces, gravel paths, and mixed terrain construction projects.

Sprockets

It is recommended to open the sprocket guard regularly and clean out debris buildup. Accumulated material during operation may cause wear on the motor oil line or corrode its connectors over time.

Wear is generally influenced by three key factors: the condition of the terrain, the speed at which the equipment operates, and the working load applied to the bulldozer.

  • Adjust the track tension regularly to ensure proper alignment and reduce stress.
  • Keep the tracks clean. Accumulated dirt, mud, and debris increase wear, reduce efficiency, and raise fuel consumption. Use a pressure hose to clean tracks daily, ideally before or after each shift.
  • Limit reverse operation. Forward movement causes less wear than reversing, which also increases fuel usage.

There are many sprocket types, but commonly used ones include: standard sprockets, double-row sprockets, industrial sprockets, drive sprockets, triple-row sprockets, hub sprockets, single-row sprockets, single/double pitch sprockets, drum sprockets, steel split sprockets, idlers, bushing sprockets, multi-strand sprockets, quick-disconnect sprockets, and taper-lock sprockets.

The sprocket transfers engine power to the track chain, allowing the machine to move forward or backward. It engages directly with the track links to maintain smooth and efficient operation, even on uneven terrain. A properly functioning sprocket also helps preserve track tension and reduces wear on other undercarriage parts.

For frequently used excavators, a daily inspection is recommended. Look for wear indicators such as cracking, loose components, or uneven tension. Regular checks help detect issues early and prevent costly repairs.

Yes, individual components like tracks, rollers, or sprockets can be replaced separately. However, replacing multiple parts together may improve alignment and reduce uneven wear. Consult our technical team to find the most effective replacement plan for your equipment.

Regular lubrication minimizes friction and wear. Clean the track chain after each use to remove dirt and debris. Monitor tension and replace worn pins or bushings promptly to avoid further damage to the assembly.

To reduce the risk of sprocket failure and minimize costly downtime, follow these key preventive practices:

  • Conduct regular inspections
  • Ensure proper lubrication
  • Avoid overloading the equipment
  • Keep the sprockets clean
  • Replace worn sprockets promptly
  • Maintain correct alignment during installation

Tracks and track pads are among the most commonly replaced undercarriage parts. These components are in constant contact with the ground and are subject to wear due to continuous movement.

Yes, all sprockets are fully compatible with Hitachi OEM parts. They are backed by the same 1-year/unlimited-hour warranty and come with complete technical support and service coverage.

Sprockets play a critical role in transferring rotational force to the track chain. Worn sprocket teeth reduce traction and accelerate wear on track links. Our selected sprockets are precision heat-treated to improve tooth hardness and wear resistance.

Wholesale purchasing offers numerous benefits, including lower unit cost, access to volume discounts, and a broader selection of parts. It also supports customized solutions and helps maintain a steady supply chain for ongoing construction projects.

Our factory team includes skilled, experienced professionals with deep expertise in quality control. From raw casting to heat treatment, machining, cleaning, assembly, painting, packaging, and final delivery, our QA inspectors conduct thorough supervision and inspections at every stage. If any issue arises, we will resolve it promptly.

Yes, we can manufacture parts based on your drawings or physical samples.

Absolutely. As a specialized manufacturer, we can customize excavator and bulldozer undercarriage parts to meet your exact technical and operational needs.

Provide your machine model or part serial number, and we will verify compatibility by supplying detailed drawings and measurements to confirm the fit with your equipment.

Yes. Our Hitachi aftermarket sprockets are designed for use in ultra-large hydraulic excavators and haul trucks in mining operations. We also offer after-sales support and technical assistance to help ensure continued performance in demanding environments.
Let's Talk

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