R210LC-9 Hyundai R220LC-9 Excavator Track Carrier Roller Forged 50Mn Induction Hardened HRC 48-55 Undercarriage Part

YT offers this R210LC-9 track carrier roller as a direct replacement top roller for Hyundai R210LC-9 and R220LC-9 excavators. These 21-ton class machines are workhorses of general contracting, and their undercarriages take steady punishment from travel on gravel, rubble and soft fill. The carrier roller sits at the top of the track frame, guiding the return chain and preventing the sag that leads to noisy, damaging chain slap on long travel stretches.

The roller is forged from 50Mn alloy steel and the tread is induction hardened to HRC 48-55 for a strong balance between wear resistance and toughness. YT delivers it as a ready-to-fit assembly with the shaft, bushings and seals installed, following the Hyundai track layout so the roller bolts into the original carrier bracket. Both the R210LC-9 and the R220LC-9 can be accommodated after a quick dimensional check of the worn part.

Main Types of Carrier Rollers Key Features

• Solid forged blank: the 50Mn body is forged rather than fabricated, giving the roller consistent strength around its full circumference.
• Hardened contact band: the tread is induction hardened to HRC 48-55 so it resists the abrasive action of the track chain.
• Controlled heat treatment: the quench and temper schedule is monitored to deliver repeatable mechanical properties in every batch.
• Sealed for wet sites: the bushing area is protected by seals that keep out mud and water on flooded job sites.
• True-to-drawing machining: CNC operations hold the flange and bore dimensions needed for a clean installation.
• Complete kit delivery: each roller leaves the factory with the shaft and bushings fitted, ready for immediate mounting.

Main Dimensions of Installation

Main Parameters

The models above are just for reference, we can't list all models here. We can supply more products as your requirements. Please feel free to send us your inquiry.

*Values are reference; OEM part number confirmation advised before ordering.

*Values are reference; OEM part number confirmation advised before ordering.

Production Process

1. Material inspection starts with a spectrometer reading of every 50Mn heat delivered to the factory.
2. Cut billets are heated in the furnace and forged into roller blanks using closed impression dies.
3. Parts are normalized to refine the grain, then hardened and tempered for a uniform core.
4. Machining centers turn the bore, the outer profile and the flanges to drawing tolerance.
5. An induction hardening machine treats the tread band and quenches it to the specified hardness.
6. Precision grinding sets the final outside diameter and a consistent surface finish.
7. Assembly stations fit the shaft, press the bushings and mount the seal rings with the correct grease.
8. Inspectors test hardness, run crack detection and record the final measurements of each piece.
9. The roller is oiled, protected and packed onto export pallets for shipment.

Factory Strength

YT brand products are manufactured by XIAMEN YINTAI MACHINERY CO., LTD., an ISO 9001:2015 certified manufacturer and exporter founded in 2011 and focused entirely on track undercarriage components. The company owns the forging, machining, heat treatment and assembly equipment used for this R210LC-9 carrier roller, so production scheduling and quality control stay in one accountable team rather than being split among subcontractors.

With 50-100 employees and annual sales of USD 10-20 million, of which 90-100% is exported, YT has built steady supply relationships with parts distributors and equipment owners worldwide. The factory welcomes SGS or independent inspection, supports OEM/ODM orders, and maintains records that let buyers trace each roller to its production batch.

• General contractor support: rollers for Hyundai machines working across multiple sites are kept in the fast-moving stock range for quick replenishment.
• Lower ownership cost: owners cut undercarriage spending by choosing YT aftermarket rollers with the same hardness specification as original parts.
• Local distributor programs: parts suppliers can rely on YT for stable pricing, consistent packing and mixed-container orders with other undercarriage items.
• Planned maintenance supply: contractors order carrier rollers together with filters and wear parts so one delivery covers the full service stop.
• Breakdown response: when a roller fails on site, YT arranges express shipment so the excavator returns to work without a long waiting period.

Compatible Brands Applications

Hyundai R210LC-9 and R220LC-9 excavators equipped with YT carrier rollers are seen in building excavation, utility trenching, site grading, scrap handling and agricultural land improvement. The top roller supports the chain return run during travel, keeping the track correctly seated on the sprocket and idler and reducing wear on the complete drive group. Maintenance teams also install YT carrier rollers during scheduled undercarriage overhauls to bring the whole track system back to like-new condition.

Q1: How do I verify the roller size for my R210LC-9 or R220LC-9?

Take the outer diameter, total width, shaft bore and bracket spacing from the old roller. Sending a photo of the part number area allows YT to cross-reference the specification more quickly.

Q2: Does YT make genuine Hyundai parts?

No. YT manufactures aftermarket replacement parts engineered to match the Hyundai specification. We clearly mark our products with the YT brand and never imitate OEM markings.

Q3: How long does the induction hardened surface last?

Service life depends on soil type, track tension and travel speed. With correct maintenance the hardened tread normally outlasts the bushing set, after which the roller can be rebuilt rather than scrapped.

Q4: Can I start with a single roller to check the fit?

Yes, our minimum order is one piece. First orders often begin with a sample roller, and we credit the sample amount against the following quantity order.

Q5: What are the lead time and warranty terms?

In-stock rollers leave within 5-7 days and production orders take 20-30 days. Every roller carries a 12-18 month warranty against material and manufacturing defects.

R210LC-9 carrier rollers are protected with anti-rust oil and film wrapping, then secured on steel pallets or export wooden pallets with strapping for safe container transport. Final inspection covers hardness, geometry and seal assembly on every roller, and test documentation is available for buyers or independent inspectors. YT also provides OEM/ODM options so distributors can receive rollers branded for their own market.

Why Choose Us?

• Through quench-tempering processes to ensure excellent mechanical properties, high strength and superior wear resistance to bending and breakage.
• Advanced Germany KUKA automatic machining center, horizontal and vertical CNC machining ensure the accuracy of assembly dimensions. This is to maximize the life span of each component and minimize production cost.
• MAKZAK Precison Finishing Machinery from Japan makes sure we have steady and good welding quality.
• We have complete production line and professional designers and working team. We can also produce any requested parts according to your blue print or samples.