We manufacture Komatsu bulldozer spring coils, engineered for track recoil assemblies. These heavy-duty coils maintain correct track tension and absorb severe front idler impacts.
As a factory-direct manufacturer, Dingtai supplies complete OEM spring coil production for global distributors, dealers, and equipment owners. We eliminate middlemen and shorten lead times.
Our spring coils resist sagging, cracking, and fatigue failure under constant shock loads. They prevent track derailment, protect final drives, and minimize costly downtime.
With over 20 years of track component manufacturing experience, Dingtai holds ISO9001 and SGS certifications. Every spring undergoes rigorous quality control and traceability.
Using 60Si2MnA spring steel, we apply CNC hot coiling, controlled quenching, tempering, and shot peening. This ensures high fatigue strength and consistent load-bearing performance.
Core Selling Points
- 20+ Years Experience: Dingtai has supplied undercarriage components for over two decades, serving North American, European, and Asian heavy equipment markets with consistent OEM-grade quality.
- Global Brand Compatibility: Our Komatsu spring coils match original part dimensions and load ratings, ensuring seamless fit across multiple bulldozer models without modification.
- Deep Quenching/Heat Treatment: Each coil undergoes controlled quenching and tempering to achieve optimal hardness. This prevents permanent deformation and extends service life under heavy loads.
- 100% QC Inspection: All spring coils pass dimensional checks, load testing, magnetic particle inspection, and surface hardness testing before shipment.
Our catalog of Komatsu Bulldozer Spring Coil includes various specifications, fully compatible with Komatsu excavators and bulldozers.
Why Choose Dingtai?
1. Production Technical Parameters
| Technical Parameter | Specification |
|---|---|
| Material | 60Si2MnA / 55CrSiA spring steel |
| Hardness | HRC 44-50 |
| Manufacturing Process | CNC hot coiling, quenching, tempering, shot peening |
| Certification | ISO9001, SGS |
| Warranty | 12 months or 2,000 hours |
2. OEM & Customization
We replicate OEM part numbers and drawings precisely. Custom wire diameter, free length, coil count, and load ratings are available to match your exact machine requirements.
3. Applicable Models
| Machine Type | Compatible Brands | Popular Series/Models |
|---|---|---|
| Crawler Bulldozer | Komatsu | D20, D31, D37, D41, D50, D60, D65, D85 |
| Crawler Loader | Komatsu | D21, D31, D37, D41, D60, D65 |
| Mining/Heavy Dozer | Komatsu | D155, D275, D355, D375, D475 |
4. Delivery & Logistics
We ship worldwide with reliable freight partners. Factory-direct pricing applies to flexible MOQs, sample orders, and bulk container programs with no hidden costs.
Technical Features
Komatsu recoil spring coils store and release impact energy between the idler and track frame. They stabilize track tension and protect final drive components.
Hot-coiled 60Si2MnA material provides uniform grain structure. Double-stage shot peening closes surface microcracks, dramatically improving fatigue resistance and long-term coil memory.
Our tempering process balances hardness and toughness. This prevents brittle fractures in sub-zero mining conditions and stops coil sag in high-temperature work environments.
Applications
- Mining
- Road Construction
- Quarrying
- Forestry
- Landfill and Demolition
- Large Infrastructure Projects
Frequently Asked Questions
What is the MOQ for Komatsu bulldozer spring coils?
MOQ typically starts at 1 piece for sample verification, with volume pricing available from 10 pieces. Mixed model orders are accepted.
What is the delivery time?
Standard production takes 15-30 days depending on order quantity and customization. Stocked popular models can ship within 7 days.
What material and heat treatment are used?
We use 60Si2MnA or 55CrSiA spring steel with controlled quenching and tempering. Surface hardness is maintained at HRC 44-50.
How do I confirm part number compatibility?
Provide your Komatsu part number or machine model. Our engineers cross-check OEM drawings, wire diameter, free length, and load capacity before quotation.
What warranty is included?
Each spring coil includes a 12-month or 2,000-hour warranty against material and manufacturing defects under normal operating conditions.
Do you offer custom spring coils?
Yes. We manufacture according to customer drawings or samples, including custom dimensions, coil count, load ratings, and surface treatments.
Maintenance Guide
- Routine Inspection: Inspect coil springs every 500 operating hours. Look for cracks, corrosion pitting, uneven coil spacing, or permanent sag.
- Housing Cleaning: Keep the recoil housing clean. Remove compacted debris and mud to prevent abrasive wear and moisture retention around the coil.
- Safe Installation: During installation, align the spring squarely in the guide. Use certified lifting tools and never compress with makeshift equipment.
- Timely Replacement: Replace both left and right recoil springs when load loss or visible fatigue cracks appear. Operating with weak springs accelerates undercarriage wear.