Dingtai manufactures heavy-duty Volvo spring coils engineered to maintain consistent track tension and absorb high-impact loads in excavator undercarriage systems.
We supply factory-direct replacement spring coils with complete OEM manufacturing services for global distributors, dealers, and rental fleet maintenance operations.
Our springs eliminate track derailment caused by weak tension, resist fatigue cracking, and reduce unplanned downtime on high-hour Volvo excavators.
Backed by over 20 years of production experience and ISO9001/SGS-certified quality systems, Dingtai provides repeatable performance for demanding earthmoving applications.
Each coil is hot-wound from 60Si2Mn spring steel, shot-peened, and tempered to resist permanent set and corrosion in harsh environments.
Core Advantages
- Premium 60Si2Mn Material: Hot-wound 60Si2Mn spring steel delivers superior tensile strength and fatigue resistance compared to standard carbon steel aftermarket coils.
- Deep Quenching/Heat Treatment: Computer-controlled oil quenching and double tempering achieve uniform HRC 42–48 hardness, preventing coil sag and extending service life.
- OEM Capabilities: We produce to OEM drawing specifications, matching wire diameter, free length, and spring rate for direct fitment without modification.
- 100% QC Inspection: Every batch undergoes dimensional inspection, load testing, and surface crack detection before release, ensuring zero-defect shipment.
Our catalog of Volvo Spring Coil includes various specifications, fully compatible with Volvo excavators and bulldozers.
Why Choose Dingtai?
Production Technical Parameters
| Parameter | Specification |
|---|---|
| Material | 60Si2Mn / 55CrSi spring steel |
| Hardness | HRC 42–48 |
| Manufacturing Process | Hot winding, oil quenching, double tempering, shot peening |
| Surface Treatment | Anti-corrosion coating / black oxide |
| Certification | ISO9001, SGS |
| Warranty | 12 months or 2,000 service hours |
OEM & Customization
We manufacture to Volvo OEM drawings, matching wire diameter, coil diameter, and spring rate. Strict tolerances ensure direct replacement fit.
Applicable Models
| Machine Type | Compatible Brands | Popular Series/Models |
|---|---|---|
| Excavator | Volvo | EC210, EC240, EC290, EC360, EC460, EC480 |
| Heavy Equipment | Volvo | EC Series Undercarriage Applications |
Delivery & Logistics
Factory-direct pricing, flexible MOQ from 10 pieces, export wooden crates, and reliable sea or air shipping to US ports.
Technical Features
Spring rate is calibrated to Volvo undercarriage tension requirements. The coil maintains linear elasticity under cyclic compressive loads without permanent deformation.
Shot peening introduces a compressive stress layer on the surface, inhibiting micro-crack initiation and improving fatigue life under continuous rock and debris impact.
Flat-ground ends seat evenly in the tensioner assembly, preventing side loading and uneven wear on idlers and track links.
Applications
- Mining: Maintains track tension on Volvo excavators operating in high-impact rock loading.
- Quarrying: Absorbs shock loads during bench excavation and material handling.
- Road Construction: Supports stable travel on graded surfaces and uneven right-of-way slopes.
- Forestry: Resists fatigue in abrasive, high-debris terrain and heavy front attachments.
Frequently Asked Questions
What is the MOQ for Volvo spring coils?
Standard MOQ is 10 pieces per specification; sample orders are accepted for first article inspection.
How do I confirm the correct part number?
Provide the OEM part number or a dimensional drawing. We cross-reference coil diameter, free length, and spring rate.
What material and heat treatment are used?
We use 60Si2Mn or 55CrSi spring steel, oil-quenched and double-tempered to HRC 42–48.
What is the warranty policy?
Warranty covers 12 months or 2,000 service hours against manufacturing defects under normal operating conditions.
How long does delivery take?
Standard specifications ship within 15–25 days. Custom OEM production requires 30–35 days depending on order quantity.
Can Dingtai match Volvo OEM specifications exactly?
Yes. We manufacture to OEM drawing tolerances and conduct load and fatigue testing before shipment.
Maintenance Guide
- Inspect coils every 500 service hours for cracks, corrosion, or settling. Measure free length and compare with OEM minimum specifications.
- Always replace spring coils in pairs to maintain balanced track tension and prevent uneven idler and sprocket wear.
- Verify end coils seat squarely in the tensioner before installation. Do not compress beyond rated travel to avoid fatigue failure.