Product Description
We manufacture the full range of undercarriage parts for Daewoo excavators—track rollers, idlers, sprockets, and chains—designed to carry machine weight and maintain stable mobility under severe track tension.
As a factory-direct manufacturer, we deliver fully integrated OEM services from forging to final assembly. This eliminates middlemen, reducing procurement cost and lead time for North American distributors and fleet operators.
Our components directly prevent premature wear, track link stretch, and sudden roller seizure. Through-hardened contact surfaces extend service life and drastically reduce unplanned downtime in abrasive job sites.
With over 20 years of focused undercarriage production and ISO9001/SGS certification, we offer repeatable quality assurance that meets the strict durability standards of veteran procurement directors.
We forge critical parts from 35MnB steel and apply deep induction quenching to achieve a hardened case depth that resists plastic deformation under shock loads and high ground pressure.
Core Selling Points
- Premium 35MnB Material
We use high-tensile 35MnB alloy steel, providing superior fatigue strength and impact resistance compared to standard carbon steels used in generic aftermarket parts. - Deep Quenching & Heat Treatment
Induction or carburizing processes create a hard surface layer (50–58 HRC) with a tough core, preventing surface-initiated cracks and spalling under continuous rock impacts. - ISO9001/SGS Certified
Every production batch is backed by ISO9001-registered processes and material test reports, giving you verifiable compliance with international procurement requirements. - OEM Capabilities
We accept drawings and samples for custom undercarriage parts, matching OEM profiles, bolt patterns, and hardness specifications exactly—no fitment compromises.
Product Grid Introduction
Our catalog of Daewoo Excavator Undercarriage Parts includes various specifications, fully compatible with Daewoo (now Doosan) excavators and bulldozers.
Why Choose Dingtai?
1. Production Technical Parameters
| Parameter | Specification |
|---|---|
| Material | 35MnB / 40Mn2 alloy steel |
| Surface Hardness | 50–58 HRC (roller tread, idler rim, sprocket tooth) |
| Case Depth | 3–5 mm (deep hardened zone) |
| Manufacturing Process | Hot forging, CNC machining, induction quenching, tempering |
| Certification | ISO9001, SGS material test available |
| Warranty | 12 months or 2,000 operating hours |
2. OEM & Customization
We replicate your existing part numbers with exact drawings, custom dimensions, and private-label packaging. Strict adherence to original equipment profile and hardness ensures drop-in replacement without on-site modification.
3. Applicable Models
| Machine Type | Compatible Brands | Popular Series / Models |
|---|---|---|
| Excavator | Daewoo / Doosan | Solar 220, 300, 470, DX225, DX300, DX420, DX480 |
| Bulldozer | Daewoo / Doosan | D25, D30, D40 tracked dozers |
4. Delivery & Logistics
We ship globally from our Fujian factory with competitive EXW/FOB pricing. MOQ starts from just one complete undercarriage set, and we consolidate orders to reduce freight cost per kilogram.
Technical Features
Our roller and idler assemblies use a lifetime-lubricated floating seal arrangement. Two metal O-rings slide against each other under compression, preventing lubricant leakage and abrasive particle ingress without periodic greasing.
Bimetallic bushings inside track links utilize a hardened inner surface and a ductile outer bore, reducing friction against the pin while absorbing shock. This pairing extends pin-to-bushing life significantly under high-load conditions.
Induction-hardened treads and tooth profiles create a martensitic microstructure in the wearing zone while retaining a tough, shock-absorbing core. This dual-hardness design prevents crack propagation through the entire section.
Applications
- Heavy earthmoving and mining operations
- Road construction and highway grading
- Quarrying and aggregate processing
- Demolition and scrap handling
- Forestry and land clearing
Frequently Asked Questions
- What is the minimum order quantity?
- MOQ is one piece for sample evaluation or one complete undercarriage set; no volume obligation for first trial orders.
- What is the delivery time?
- Standard delivery is 30–40 days after order confirmation, depending on production backlog and customization requirements.
- How deep is the heat treatment?
- Induction-hardened case depth is typically 3–5 mm on roller treads and idler rims, verified by hardness traverse testing.
- What warranty do you provide?
- 12 months or 2,000 hours against manufacturing defects under normal operating conditions, excluding impact damage from external causes.
- Can you cross-reference OEM part numbers?
- Yes. We match part numbers from Daewoo / Doosan manuals and can supply according to your specific part code.
- Do you offer track chains with sealed and lubricated joints?
- Yes, we offer both sealed-and-lubricated (SALT) and dry chain options, depending on machine series and operating environment.
Maintenance Guide
- Inspect roller oil level visually through plug windows; any oil leakage indicates floating seal replacement.
- Measure track link pitch regularly; replace chain before pin/bushing wear exceeds 3% elongation to protect sprocket teeth.
- Rotate sprocket side when tooth wear reaches 50% of profile; reversed installation doubles service life.
- Maintain correct track sag as per machine manual—over-tensioning accelerates roller and idler bearing failure.
- Replace all fasteners with OEM-spec bolts during assembly; use torque values from Daewoo workshop specifications.