Dingtai manufactures complete undercarriage components—track rollers, idlers, sprockets, and chains—that carry the machine’s weight and transfer drive torque to the ground.
Factory-direct supply eliminates middlemen. We offer full OEM manufacturing services, from raw forging to finished assembly, serving distributors and equipment fleets worldwide.
Our parts resist premature wear and catastrophic breakage. Deep-hardened surfaces and sealed internals prevent unscheduled downtime in the harshest digging conditions.
With over 20 years of specialized production and ISO9001/SGS certification, Dingtai delivers repeatable quality that meets or exceeds OEM part life expectations.
We forge critical components from 35MnB steel and apply deep induction quenching to achieve a wear-resistant case up to 8 mm, safeguarding core toughness.
Core Advantages
- 20+ Years Experience: Two decades focused exclusively on undercarriage manufacturing ensures mature processes, strict quality control, and deep application knowledge for Liebherr machines.
- Premium 35MnB Material: High-purity boron-manganese steel provides an optimal balance of surface hardness and impact resistance, essential for high-impact excavator duty cycles.
- Deep Induction Quenching: Computer-controlled heat treatment penetrates 6–8 mm deep, producing HRC 50–58 hardness that dramatically extends wear life in abrasive materials.
- ISO9001/SGS Certified: Independent certification of our quality management system and material traceability gives procurement directors verifiable assurance of consistent production standards.
Our catalog of Liebherr Excavator Undercarriage Parts includes various specifications, fully compatible with Liebherr hydraulic excavators and crawler dozers.
Why Choose Dingtai?
1. Production Technical Parameters
| Parameter | Specification |
|---|---|
| Material | 35MnB / 40Mn2 forged steel |
| Hardness (HRC) | 50–58 surface, tough core |
| Heat Treatment | Deep induction quenching + tempering |
| Seal Type | Floating face seals, lifetime lubricated |
| Certification | ISO9001:2015, SGS material report |
| Warranty | 12 months or 2,000 operating hours |
2. OEM & Customization
We match your engineering drawings or original samples precisely. Dimensional tolerances, hardness profiles, and bushing fitments are held to strict OEM specifications.
3. Applicable Models
| Machine Type | Compatible Brands | Popular Series / Models |
|---|---|---|
| Hydraulic Excavator | Liebherr | R 914, R 924, R 934, R 944, R 954, R 964, R 974, R 984, R 9100, R 9150, R 9200 |
| Crawler Dozer | Liebherr | PR 724, PR 734, PR 736, PR 746, PR 756, PR 766, PR 776 |
4. Delivery & Logistics
We ship globally by sea or air with reliable forwarding partners. Factory-direct pricing and a low MOQ accommodate both bulk replenishment and trial orders.
Technical Features
Our track rollers incorporate a floating metal-face seal system that creates a permanent oil barrier, blocking mud, water, and fine abrasive particles from entering the bearing cavity.
The bimetal bushing, bonded to a hardened shaft, distributes radial loads evenly. This design minimizes localized galling and maintains smooth rotation throughout the roller’s service life.
Idlers and sprockets receive deep case hardening through progressive induction quenching. The thick wear layer withstands constant track link engagement without flaking or spalling.
Applications
- Mining and quarrying
- Heavy earthmoving and road construction
- Demolition and scrap handling
- Forestry and land clearing
- Large-scale infrastructure projects
Frequently Asked Questions
- What is the minimum order quantity?
- MOQ is typically 4–8 pieces per part number, depending on size. We support small trial lots for first-time customers.
- How long does delivery take?
- Standard production lead time is 25–35 days. Air freight can reduce total transit to 7–10 days when urgency is critical.
- What is the heat treatment depth?
- Induction-quenched hardness depth reaches 6–8 mm before transition to a shock-resistant core, verified by sectioning and micro-hardness testing.
- Do you provide a warranty?
- Yes, 12 months or 2,000 working hours under normal operating conditions. Premature failures are analyzed and replaced promptly.
- How do I match my Liebherr part number?
- Provide the OEM part number or a dimensional drawing. Our engineering team cross-references the exact interchange using internal databases.
- What material is used for the rollers?
- We forge rollers from 35MnB or 40Mn2 steel, chosen for high fatigue strength and compatibility with deep hardening processes.
- Are the parts interchangeable with OEM undercarriages?
- Fully dimensionally interchangeable. Bolt patterns, tread diameter, and guide flange geometry are machined to OE specifications.
Maintenance Guide
- Inspect track roller and idler surfaces weekly for oil leaks or excessive wear flats.
- Maintain correct track tension to prevent accelerated sprocket and chain wear.
- Check floating seal integrity; replace units immediately if evidence of grit ingress appears.
- Rotate or replace worn idler rim sections after 40–50% of the hardened layer is consumed.
- Always use manufacturer-recommended lubricant grades when topping off sealed units.