Dingtai manufactures Case idler assemblies that guide track chains and maintain precise track tension for excavators and dozers.
We supply factory-direct replacement idlers with full OEM manufacturing services for global equipment distributors, rental companies, and fleet owners.
Precision-machined hardened surfaces prevent premature wear, unplanned downtime, and track misalignment in demanding earthmoving, mining, and quarry applications.
With over 20 years of engineering experience and ISO9001/SGS certified production, Dingtai delivers consistently reliable undercarriage components.
We use 35MnB material and deep induction quenching to produce idlers with high surface hardness and extended service life.
Core Selling Points
- Premium 35MnB Material: High-grade forged steel provides excellent core strength and resistance to impact, bending, and wear under heavy loads.
- Deep Quenching/Heat Treatment: Induction hardened treads reach 50-55 HRC, extending idler life and resisting surface spalling in abrasive undercarriage conditions.
- 100% QC Inspection: Each idler undergoes dimensional, hardness, and visual checks before packing, ensuring consistent OEM fit and reliable field performance.
- OEM Capabilities: We produce directly to OEM drawings, part numbers, and customized dimensions, supporting exact replacement and fleet-specific requirements.
Product Catalog
Our catalog of Case idlers includes various specifications, fully compatible with Case excavators and bulldozers.
Why Choose Dingtai?
1. Production Technical Parameters
| Parameter | Specification |
|---|---|
| Material | 35MnB / 40MnB forged steel |
| Surface Hardness | 50-55 HRC (rim tread) |
| Heat Treatment Depth | 4-8 mm induction hardened case |
| Manufacturing Process | Forging, machining, induction hardening, grinding, assembly |
| Certification | ISO9001:2015, SGS |
| Warranty | 12 months or 2,000 operating hours |
2. OEM & Customization
We match customer drawings, OEM part numbers, and custom dimensions with strict tolerance control for direct-fit replacement.
3. Applicable Models
| Machine Type | Compatible Brands | Popular Series/Models |
|---|---|---|
| Excavator | Case | CX130, CX210, CX240, CX350, CX490 |
| Dozer | Case | 850M, 1150M, 1650M |
| Other Undercarriage Models | Case | Per OEM part number or drawing |
4. Delivery & Logistics
Factory-direct pricing, flexible MOQ, and reliable export packing with sea or air freight support for global distributors and mixed-container shipments.
Technical Features
Forged 35MnB idler rims are induction hardened to achieve high surface hardness while retaining a tough, impact-resistant core.
Precision-machined shafts and bimetal bushings ensure smooth rotation, even load distribution, and reduced friction under high load.
Sealed, lubricated designs prevent dirt ingress and moisture contamination, extending service life in severe undercarriage conditions.
Applications
- Mining
- Road construction
- Quarrying
- Demolition
- Forestry
- Heavy civil works
Frequently Asked Questions
1. What is the MOQ for Case idlers?
MOQ is flexible; one unit is accepted for stock orders, while mixed-container shipments reduce freight cost for bulk orders.
2. What is the delivery time?
Standard delivery is 15-30 days after deposit confirmation, depending on order quantity and current production schedule.
3. What heat treatment depth do you apply?
We apply induction hardening to a depth of 4-8 mm on the idler rim, achieving 50-55 HRC surface hardness.
4. What warranty do you provide?
Warranty covers 12 months or 2,000 operating hours from shipment, whichever comes first, against manufacturing defects.
5. Can you match Case OEM part numbers?
Yes. Provide your OEM part number or drawing; we verify and produce to the correct specification.
6. Do you offer custom idler dimensions?
Yes, we manufacture according to customer drawings and dimensions with strict tolerance control.
7. What certifications does Dingtai hold?
Production is ISO9001:2015 certified and supported by SGS material and quality inspection reports.
Maintenance Guide
- Inspect idler tread and flanges every 250 hours for uneven wear, cracks, or pitting.
- Maintain correct track tension; over-tension increases idler rim and bearing load and accelerates wear.
- Check seals and lubricant condition during routine undercarriage service intervals.
- Replace when surface hardening is worn through or shaft radial play exceeds OEM tolerance.