We manufacture complete undercarriage components—track rollers, idlers, sprockets, and chains—designed to support and propel Volvo excavators with maximum stability.
As a factory-direct supplier, we offer full OEM manufacturing services, delivering exact-fit parts that meet or exceed original specifications for global partners.
Our parts combat premature wear and sudden failures. Advanced metallurgy and sealing prevent downtime caused by debris ingress, impact fractures, and poor lubrication.
With over 20 years of specialized production and ISO9001/SGS-certified facilities, every component reflects consistent quality and repeatable engineering precision.
We forge housings from 35MnB steel and apply deep quenching to achieve a hardened case depth that dramatically extends service life under extreme loads.
Core Advantages
- Global Brand Compatibility – Components are reverse-engineered from genuine Volvo drawings, guaranteeing 100% dimensional accuracy across EC, EW, and crawler carrier series.
- Premium 35MnB Material – Roller shells and rims are forged from high-tensile 35MnB boron steel, providing exceptional resistance to deformation and abrasive wear.
- Deep Quenching & Heat Treatment – Tread surfaces and flange areas undergo induction hardening to HRC 50-58, creating a thick wear-resistant layer without compromising core toughness.
- ISO9001/SGS Certified – Our quality system and metallurgical labs are audited to ISO9001 standards with SGS verification, ensuring every batch meets strict hardness and dimensional tolerances.
Our catalog of Volvo Excavator Undercarriage Parts includes various specifications, fully compatible with Volvo excavators and bulldozers.
Why Choose Dingtai?
1. Production Technical Parameters
| Parameter | Specification |
|---|---|
| Material | 35MnB / 40Mn2 forged alloy steel |
| Hardness (HRC) | HRC 50-58 (tread & flange after induction hardening) |
| Manufacturing Process | Closed-die forging → CNC machining → deep quenching → assembly with floating seals |
| Certification | ISO9001:2015, SGS material & hardness reports |
| Warranty | 12 months or 2,000 operating hours under normal conditions |
2. OEM & Customization
We match customer-supplied drawings precisely. Custom dimensions, bolt patterns, and seal specifications are produced to strict OEM standards without deviation.
3. Applicable Models
| Machine Type | Compatible Brands | Popular Series/Models |
|---|---|---|
| Crawler Excavators | Volvo | EC210, EC240, EC290, EC360, EC460, EC480, EC700, EC950 |
| Compact Excavators | Volvo | ECR58, ECR88, ECR145 |
| Wheeled Excavators | Volvo | EW140, EW160, EW180, EW200 |
| Crawler Carriers | Volvo | Series A25, A30, A40 undercarriage components |
4. Delivery & Logistics
We ship factory-direct with reliable logistics partners. Flexible MOQ from trial orders to container loads ensures cost efficiency and consistent supply.
Technical Features
Our track rollers integrate a floating metal face seal system. This dual-cone seal dynamically maintains an oil film between lapped surfaces, permanently excluding contaminants while retaining lubricant for life.
Bimetal bushings with a steel backing and sintered bronze lining provide high-load bearing capacity. The porous bronze retains oil, enabling self-lubrication and reduced galling under boundary friction conditions.
Idlers are assembled with precision preloaded tapered roller bearings. The face-type floating seal installed on both sides compensates for axial shaft deflection, keeping the internal cavity sealed despite lateral frame twisting.
Applications
- Open-pit mining and quarrying
- Heavy earthmoving and infrastructure development
- Road and highway construction
- Forestry and land clearing
- Demolition and scrap handling
- Large-scale utility and pipeline projects
Frequently Asked Questions
- What is the minimum order quantity for Volvo undercarriage parts?
- MOQ is typically 4–10 pieces per item. We support trial orders and mixed containers for new partners.
- How long is your standard delivery time?
- Regular models ship within 15–25 days after deposit. Custom or large-volume orders may require 30–40 days depending on forging scheduling.
- What is the case depth after heat treatment?
- Induction hardening achieves an effective case depth of 5–10 mm on tread surfaces, resulting in HRC 50–58 at the contact zone.
- Do you provide a warranty on these components?
- Yes, a 12-month or 2,000-hour warranty covers manufacturing defects. Wear from abrasive ground conditions is not covered under standard warranty.
- Can you produce parts from our own drawings or samples?
- Absolutely. We offer full OEM service, reverse-engineering from samples or 3D CAD files to produce exact-fit replacements.
- Are your parts interchangeable with genuine Volvo part numbers?
- All dimensions are matched to OEM specifications. We reference genuine Volvo part numbers to ensure bolt hole alignment and flange geometry are identical.
- What material grades are standard for your rollers and idlers?
- We use 35MnB boron steel for housings and 40Mn2 for shafts. Bushing material is lead-free CuSn10P1 bimetal for high fatigue strength.
- Do you offer different seal configurations?
- Standard is duo-cone floating seal. Heavy-duty double-barrier seals or HNBR O-ring variants are available for swampy or highly abrasive sites.
- How do you ensure dimensional accuracy in mass production?
- CNC machining centers with in-process probing and a 100% final inspection on critical bores and pilot diameters guarantee consistent fit.
- Can you supply complete undercarriage kits?
- Yes, we package full track chain assemblies with matched sprockets, idlers, and rollers to simplify fleet maintenance scheduling.
Maintenance Guide
- Pre-installation check: Verify part number against machine serial number. Clean mounting surfaces and inspect bore tolerances.
- Torque procedures: Tighten mounting bolts to manufacturer-specified torque sequence and values. Re-torque after first 50 operating hours.
- Leak monitoring: Inspect for oil leakage around floating seals weekly. A thin oil film is normal; wet streaks indicate seal wear.
- Tread wear assessment: Measure tread depth at three points. Replace rollers when 75% of the hardened layer is consumed to protect the rail.
- Axial play inspection: Check lateral clearance with a feeler gauge. Excessive side movement signals internal bearing or bushing degradation.
- Replacement interval: Under severe mining conditions, plan complete undercarriage overhaul every 2,000–3,000 hours. Milder applications may extend to 4,000 hours.