Deep Induction Hardening (HRC 52-58)
Deep Induction Hardening (HRC 52-58)
Undercarriage Parts FAQs
Q: What undercarriage components do you supply for excavators and bulldozers?
A: Tatan Machinery supplies complete undercarriage wear parts, including track rollers (bottom rollers), carrier rollers (top rollers), front idlers, sprockets (drive wheels / segment groups), track chain link assemblies, and single/double/triple grouser track shoes.Q: What is the heat treatment depth and surface hardness of your track rollers?
A: Our track rollers and idlers are forged from high-grade 40Mn2/50Mn alloy steel and undergo deep differential induction hardening, achieving a surface hardness of HRC 52–58 with a hardened depth of 8–12 mm to maximize wear resistance.Q: How do you prevent oil leakage in track rollers and front idlers under muddy conditions?
A: All our rollers and idlers are equipped with precision Duo-Cone floating oil seals and heavy-duty bimetal bronze bushings, providing lifetime maintenance-free lubrication that resists dirt, mud, and water ingress.Q: How do I verify track chain pitch and link compatibility before ordering?
A: Provide your machine model, track pin pitch measurement (e.g. 190mm, 203mm, 216mm), or number of track chain links (e.g. 45L, 49L). Our technical engineers cross-reference OEM parts catalogs for 100% fitment accuracy.Q: What is the warranty coverage and export container packaging?
A: All complete undercarriage components come with a 12-month / 2,000-hour quality warranty. Heavy track chains, rollers, and idlers are securely banded onto heavy-duty steel export pallets to prevent ocean freight transit damage.
A Guide to Undercarriage Parts and Their Uses
Construction Machinery Undercarriage Applications
Earthmoving & Quarry Digging
Provides heavy load-bearing support and smooth track chain travel across rugged dirt and rock construction sites.
Heavy Mining & Dozing Duty
Withstands severe impact and extreme ground abrasion during continuous heavy mining and bulldozer dozing.
Machinery Rental Fleets
Ensures long wear life and low operating cost per hour for long-term excavator and crawler tractor rental fleets.
Overhaul & Track Rebuild Workshops
100% bolt-on replacement rollers, idlers, sprockets, and track group assemblies for quick undercarriage overhaul turnaround.
A Comprehensive Buyer’s Guide to Construction Machinery Undercarriage Parts
The undercarriage system carries the entire operational weight of tracked excavators, bulldozers, and crawler cranes, accounting for up to 50% of machine lifecycle maintenance costs. Continuous friction against rock, sand, and mud causes progressive wear on track rollers, front idlers, drive sprockets, and track link bushings. Tatan Machinery supplies forged and deep-hardened undercarriage wear components engineered with Duo-Cone lifetime seals to withstand continuous heavy shock loads and severe ground impact."As documented in Caterpillar Undercarriage System Custom Track Service Guidelines: 'Track rollers and Sealed and Lubricated Track (SALT) link assemblies operating in high-abrasion rock conditions require deep induction hardening and Duo-Cone seal integrity to prevent internal pin-bushing galls and extend undercarriage wear life up to 4,000+ operating hours.'" — Official Source: Caterpillar Undercarriage Management System Guidelines
Popular Undercarriage Parts Series We Support
Below is a comprehensive list of high-frequency undercarriage components supported by Tatan Machinery across major crawler machinery brands:| Brand / Manufacturer | Popular Equipment Series | Available Undercarriage Components |
|---|---|---|
| Caterpillar (CAT) | CAT 320D, 323D, 330D, 336D, 345D, D6N, D6T, D8T Dozers | Track rollers, carrier rollers, front idlers, sprockets, track chain links, track shoes |
| Komatsu | PC200-8, PC220-8, PC300-8, PC400-7, D65E-12, D85A, D155A Dozers | Single/double flange track rollers, recoil spring ass'y, segment groups |
| Shantui Dozer Series | Shantui SD13, SD16, SD22, SD32 Heavy Bulldozers | Heavy-duty bulldozer track rollers, drive teeth, idler ass'y, single grouser shoes |
| Hitachi & Volvo | Hitachi ZX200, ZX330, EX200 / Volvo EC210B, EC290B, EC380D | Top/bottom rollers, drive sprockets, sealed track link chains, track bolt nuts |
| Doosan & Hyundai | Doosan DX225LC, DX300LC / Hyundai R210LC-7, R220LC-9S, R305-7 | Track group assemblies, carrier rollers, front tension idlers, triple grouser shoes |
1. Caterpillar (CAT): CAT 320D (175-3251 Roller), 323D, 330D, 336D, D6N Dozer (CR5525), D8T Bulldozer Undercarriage
2. Komatsu: PC200-8 (20Y-30-00010 Roller), PC220-8, PC300-8, D65E-12 Dozer, D155A Heavy Undercarriage
3. Shantui Bulldozer: SD13, SD16 (16Y-40-06000 Roller), SD22 (154-30-00293), SD32 Heavy Bulldozer Track Group
4. Hitachi: ZX200-3 (9182672 Roller), ZX210-5G, ZX330-3, EX200-5 Track Roller & Drive Sprocket
5. Volvo: EC210B (VOE14524270 Roller), EC240B, EC290B, EC380D Track Chain & Front Idler Assembly
6. Kobelco: SK200-8 (YN52D00002F1 Roller), SK210-8, SK350-8 Track Group & Carrier Roller
7. Doosan: DX225LC-5 (2270-1008A Roller), DX300LC, DH220-5 Track Chain Link & Sprocket
8. Hyundai: R210LC-7 (31Q6-40010 Roller), R220LC-9S, R305-7 Track Roller & Idler Assembly
9. SANY: SY215C, SY235C, SY365H, SY500H Excavator Track Roller & Segment Group
10. Kubota & Yanmar: Kubota KX161, U35, Yanmar ViO35, ViO55 Mini Excavator Rubber Tracks & Bottom Rollers
Key Takeaways for Sourcing Undercarriage Wear Parts
- Forged Steel Hardening Depth: High-quality track rollers forged from 40Mn2/50Mn steel feature 8–12 mm differential induction hardening depth (HRC 52–58) to maximize wear resistance.
- Duo-Cone Floating Seals: Precision metallic floating seals with nitrile O-rings ensure lifetime internal oil lubrication and zero mud/water contamination.
- SALT Track Chain Technology: Sealed and Lubricated Track (SALT) chains store synthetic grease in pin joints, reducing pin-bushing internal friction wear by 50%.
- Sprocket Segment Hardening: Drive sprocket teeth undergo deep flame/induction hardening to match track link bushing wear profiles and prevent chain jumping.
- Track Pitch Verification: Verifying track link pitch (e.g. 190mm, 203mm, 216mm) and shoe width ensures 100% bolt-on compatibility with your crawler chassis.
Understanding Heavy Machinery Undercarriage Wear Mechanics
Differential Heat Treatment & Hardness Profiles
Undercarriage parts face constant abrasive wear from rock, sand, and soil. To prevent premature flat spots or rim cracking, track roller shells and front idlers undergo differential heat treatment. This process produces a rock-hard outer wear surface (HRC 52–58) while maintaining a tough, ductile inner steel core to absorb extreme ground impact shocks.| Undercarriage Metric | Engineering Standard & Material Specification |
|---|---|
| Shell Material | Forged 40Mn2 / 50Mn Alloy Steel (Tensile strength ≥ 980 MPa) |
| Surface Hardness | HRC 52 – 58 (Tread surface & flange guiding faces) |
| Induction Hardening Depth | 8 mm – 12 mm effective hardening depth to prevent premature shell wear |
| Sealing System | Duo-Cone precision floating metallic seals with NBR 70° shore O-rings |
Undercarriage Track Pitch, Pin Diameter & Hardness Specs
| Machinery Class | Track Pitch (mm) | Pin Diameter (mm) | Hardness Depth (mm) | Tread Hardness (HRC) |
|---|---|---|---|---|
| 3.5 – 8 Ton Mini Equipment | 135 – 154 mm | 28 – 35 mm | 5 – 7 mm | HRC 50 – 54 |
| 13 – 22 Ton Medium Machinery | 171 – 190 mm | 36.6 – 44.6 mm | 8 – 10 mm | HRC 52 – 56 |
| 24 – 35 Ton Heavy Duty | 203 – 216 mm | 44.6 – 50.8 mm | 10 – 12 mm | HRC 54 – 58 |
| 38 – 50+ Ton Mining & Dozers | 228 – 260+ mm | 52.8 – 65.0+ mm | 12 – 16 mm | HRC 56 – 60 |
Technical Feature Matrix: CAT 320D & Komatsu PC200-8 Undercarriage Standards
Below is a detailed technical matrix for industry-standard 20-ton equipment undercarriage wear components:| Technical Feature | Engineering Specification & Operational Standard |
|---|---|
| Standard Roller Models | CAT 175-3251 (320D) / Komatsu 20Y-30-00010 (PC200-8) / Hitachi 9182672 |
| Flange Type Options | Single Flange (SF) & Double Flange (DF) track roller configurations |
| Track Chain Link Pitch | 190 mm pitch (45 Links or 49 Links per side) |
| Lubrication Standard | Lifetime lubricated with synthetic SAE 80W-90 gear oil |
| Track Shoe Options | 600mm / 700mm / 800mm Triple Grouser (Excavators) & Single Grouser (Dozers) |
Practical Guide to Sourcing Heavy Equipment Undercarriage Parts
1. Checking Supplier Credibility & Ultrasonic Flaw Inspection
When sourcing heavy undercarriage components internationally, forge quality and structural integrity are paramount. Partner with suppliers who utilize ultrasonic flaw detection on forged roller shells and track links. Tatan Machinery Subjects undercarriage components to 100% dimensional and crack testing prior to export dispatch."As documented in Komatsu Heavy Equipment Undercarriage Maintenance Manuals: 'Maintaining proper track chain tension, routinely clearing packed mud from sprocket teeth, and inspecting Duo-Cone floating seal face integrity prevents abrasive pin-bushing wear, extending undercarriage operational lifespan by over 30%.'" — Official Source: Komatsu Construction Equipment Technical Guidelines
2. Verifying Track Pitch & Sprocket Segment Tooth Profiles
Undercarriage sprockets and segment groups must match track link pin bushing profiles perfectly. Pitch mismatch causes extreme tooth wear and chain jumping. Before ordering, verify your machine track pitch (e.g. 190mm, 203mm) and shoe bolt hole dimensions. Tatan Machinery’s engineers cross-reference these dimensions using OEM part numbers to guarantee 100% bolt-on compatibility.3. Preventing Mud Packing & Track Pin Galling
Operating in sticky clay or wet rock causes debris packing between idlers and recoil springs, increasing track chain tension to dangerous levels. Always adjust recoil spring tension to factory sag specifications (25–40 mm track sag) and clean track frames regularly to protect rollers and idlers.Why Choose Tatan Machinery: Undercarriage Supplier Comparison
Below is a clear comparison showing why repair workshops, mining operators, and fleet managers trust Tatan Machinery over generic traders:| Key Metric | Tatan Machinery Standard | Typical Generic Traders | Buyer Advantage |
|---|---|---|---|
| Forging & Hardening | Forged 40Mn2/50Mn Steel with HRC 52–58 Deep Hardening (8–12mm) | Cast Iron / Shallow Hardening (2–4mm) | 2x Longer Wear Life in Rock |
| Sealing System | Precision Duo-Cone Metallic Floating Seals (Lifetime Lubricated) | Standard NBR Rubber Rings | Zero Mud Leakage or Seizure |
| Warranty Coverage | 12 Months / 2,000 Hours Warranty on Undercarriage | 30–90 Days / No Warranty | Full Capital Protection |
| Technical Support | 24/7 Undercarriage Specialists (Pitch Verification < 1 Hr) | Sales Team Only (Slow Reply) | 100% Precision Bolt-On Fit |
| Export Packaging | Steel-Banded Heavy Export Pallets & Steel Crates | Loose Cargo / Basic Wooden Skids | Zero Ocean Freight Transit Loss |