Dingtai manufactures Daewoo spring coils that maintain track tension and absorb recoil shock in excavator undercarriage systems.
We supply factory-direct replacement coils with full OEM manufacturing support for global distributors, dealers, and aftermarket parts wholesalers.
Our coils resist fatigue, coil binding, and sagging, preventing track throw, excessive undercarriage wear, and unplanned excavator downtime.
With over 20 years of undercarriage component production and ISO9001/SGS-certified quality systems, Dingtai delivers consistent, traceable spring performance.
Each coil uses high-tensile 60Si2Mn spring steel, precision coiling, quenching, tempering, and shot peening to ensure long service life.
Core Selling Points
- Premium 60Si2Mn Spring Steel: Manufactured from high-tensile spring steel to meet OEM load ratings and resist fatigue under repeated impact.
- Precision Heat Treatment & Shot Peening: Quenching and tempering achieve HRC 42-48, while shot peening adds compressive stress to prevent surface cracking and spring failure.
- OEM Capabilities & Custom Dimensions: We produce coils from drawings, samples, or OEM part numbers with exact wire diameter, free length, and load specifications.
- 100% QC Inspection & Load Testing: Every spring coil undergoes dimensional inspection, hardness testing, and compression load verification before shipment.
Our catalog of Daewoo Spring Coil includes various specifications, fully compatible with Daewoo (Doosan) excavators and bulldozers.
Why Choose Dingtai?
Production Technical Parameters
| Parameter | Specification |
|---|---|
| Material | 60Si2Mn / 55CrSi spring steel |
| Hardness | HRC 42–48 (quenched & tempered) |
| Process | CNC coiling, quenching, tempering, shot peening, load testing |
| Certification | ISO9001:2015, SGS |
| Warranty | 12 months or 2,000 service hours |
OEM & Customization
We match OEM drawings, custom free lengths, wire diameters, and load ratings, ensuring precise fit and performance for Doosan aftermarket requirements.
Applicable Models
| Machine Type | Compatible Brands | Popular Series/Models |
|---|---|---|
| Tracked Excavator | Daewoo (Doosan) | Solar 55-V, Solar 220-V, Solar 300-V |
| Tracked Excavator | Daewoo (Doosan) | DH220-5/7, DH300-5/7, DX225LC, DX300LC |
Delivery & Logistics
Factory-direct pricing, flexible MOQ, and reliable sea or air freight support fast delivery to North America and global aftermarket customers.
Technical Features
The coil stores kinetic energy under track tension and releases it during recoil, protecting the final drive and idler assembly from shock loads.
High-tensile 60Si2Mn steel is quenched and tempered to HRC 42-48, producing uniform hardness that resists fatigue and permanent set.
Shot peening creates surface compressive stress, delaying crack propagation and extending service life under cyclic impact and vibration.
Applications
- Open-pit mining and mineral extraction
- Road and highway construction
- Quarry and aggregate processing
- Demolition and site clearing
- Forestry and land management
Frequently Asked Questions
What is the minimum order quantity for Daewoo spring coils?
Standard replacement coils have an MOQ of 1 piece. Custom production typically requires 10–20 pieces depending on tooling and drawing complexity.
How long does delivery take?
Stock items ship in 3–7 days. Custom-manufactured coils usually ship within 15–25 days after drawing confirmation and deposit receipt.
Do you provide exact Daewoo part number matching?
Yes. Supply the OEM part number or undercarriage drawing, and we cross-reference it to produce a dimensionally equivalent spring coil.
What heat treatment is applied?
Coils are through-hardened to HRC 42–48, then shot peened. This differs from surface hardening and ensures uniform fatigue resistance throughout the material.
What is the warranty policy?
We provide a 12-month warranty covering material and manufacturing defects under normal operating conditions.
Can you produce custom dimensions or higher load ratings?
Yes. We manufacture to drawing, sample, or required free length, wire diameter, and load specification for aftermarket and OEM programs.
Maintenance Guide
- Inspect spring coils every 500 hours for cracks, coil contact, corrosion, and reduced free length during track tension checks.
- Use a proper recoil spring compressor for installation or removal; never release stored energy without controlled restraint.
- Replace springs when free length falls below OEM tolerance, coils bind, or track tension cannot be adjusted correctly.
- Keep spring seats and adjuster area clear of debris and moisture to reduce corrosion and uneven load distribution.