Dingtai manufactures heavy-duty Case bulldozer spring coils for track tensioning systems. These coils maintain correct track tension and absorb severe undercarriage shock loads.
We operate as a factory-direct supplier with full OEM manufacturing services, supplying replacement spring coils to distributors and equipment fleets globally.
This coil prevents premature track wear and downtime by resisting fatigue, deformation, and breakage under continuous high-impact operating conditions.
With over 20 years of undercarriage component experience and ISO9001/SGS certified processes, Dingtai delivers repeatable quality and traceable production standards.
Using premium spring steel, hot coiling, and controlled heat treatment, our coils achieve high hardness and long service life in demanding terrain.
Core Selling Points
- Premium Spring Steel Material: Coils are manufactured from high-tensile chrome-silicon or manganese spring steel, ensuring superior fatigue resistance under constant compression and rebound loads.
- Deep Quenching/Heat Treatment: Controlled quenching and tempering create uniform hardness depth, preventing soft cores and improving long-term load-bearing performance in bulldozer track systems.
- 100% QC Inspection: Each batch undergoes dimensional, hardness, and load testing, ensuring spring free height and spring rate meet OEM tolerance before shipment.
- OEM Capabilities: We produce according to original drawings or samples, matching Case OEM part numbers, dimensions, and performance requirements without brand markup.
Product Range Overview
Our catalog of Case Bulldozer Spring Coil includes various specifications, fully compatible with Case excavators and bulldozers.
Why Choose Dingtai?
1. Production Technical Parameters
| Parameter | Specification |
|---|---|
| Material | 60Si2MnA / 55CrSi spring steel |
| Hardness | HRC 45–52 after tempering |
| Process | Hot coiling, quenching, tempering, shot peening, preset |
| Certification | ISO9001:2015, SGS |
| Warranty | 12 months or 2,000 working hours |
2. OEM & Customization
We match customer-provided drawings, samples, or part numbers. Custom wire diameter, free height, and spring rate are manufactured to strict OEM tolerances.
3. Applicable Models
| Machine Type | Compatible Brands | Popular Series/Models |
|---|---|---|
| Bulldozer / Crawler Tractor | Case Construction | 450, 550, 650, 750, 850, 1150, 1650, 1850 |
4. Delivery & Logistics
Dingtai ships from China with reliable forwarders, offers factory-direct pricing, and accepts flexible order quantities from trial samples to full container loads.
Technical Features
Hot-wound coils are quenched and tempered to balance spring hardness with fatigue resistance, preventing permanent set under constant bulldozer track loads.
Shot peening creates compressive stress on the wire surface, which delays crack formation and extends service life in abrasive mining conditions.
Each spring is preset and load-tested to stabilize free height and verify spring rate before leaving the factory.
Applications
- Mining and quarry overburden removal
- Road construction and site preparation
- Land clearing and forestry dozing
- Landfill and heavy earthmoving
- Infrastructure and pipeline projects
Frequently Asked Questions
- What is the MOQ for Case bulldozer spring coils?
Trial orders start at 2–5 pieces. Bulk pricing applies from 20 pieces or full pallet quantities. - What is the delivery time?
Standard production takes 15–25 days after drawing confirmation and deposit, depending on order quantity. - How deep is the heat treatment?
Springs are through-hardened and tempered to HRC 45–52, with controlled depth ensuring core toughness and surface fatigue resistance. - What warranty do you provide?
We offer a 12-month or 2,000-working-hour warranty against manufacturing defects, excluding normal wear or misuse. - Can you match a Case part number?
Yes. Send the OEM part number, drawing, or sample. We cross-reference dimensions and spring specifications to supply an exact fit. - What material is used?
We use 60Si2MnA or 55CrSi spring steel as standard. Custom material grades are available on request.
Maintenance Guide
- Install in the track adjuster according to Case service manual torque sequences and alignment marks.
- Check spring free height and coil spacing every 500 working hours. Replace if height loss exceeds OEM limits.
- Inspect for surface cracks, corrosion, or coil contact. Damaged springs must be replaced in pairs to ensure balanced track tension.