Top Description
Dingtai manufactures Kobelco idler assemblies, the front support component that maintains track tension and alignment in excavator undercarriage systems.
We operate factory-direct with full OEM manufacturing services, supplying replacement idlers to distributors and equipment owners worldwide.
Our idlers prevent premature track wear, reduce derailment risk, and eliminate unplanned downtime caused by failed or leaking idler assemblies.
With over 20 years of undercarriage manufacturing and ISO9001/SGS certified processes, we deliver repeatable quality and field-proven durability.
Idler bodies use 35MnB steel with deep quenching to achieve high surface hardness and a tough core for impact resistance.
Core Selling Points
- Premium 35MnB Material: Forged 35MnB idler shells provide high tensile strength and withstand severe shock loads in demanding excavation conditions.
- Deep Quenching/Heat Treatment: Induction hardening reaches specified HRC depth, extending wear life and resisting spalling under continuous track tension.
- ISO9001/SGS Certified: Production and inspection follow ISO9001 standards with SGS material verification, ensuring consistent quality batch after batch.
- OEM Capabilities: We match original Kobelco part numbers and drawings, providing direct replacement fit without modification.
Product Grid
Our catalog of Kobelco Idler includes various specifications, fully compatible with Kobelco excavators and bulldozers.
Why Choose Dingtai?
1. Production Technical Parameters
| Technical Parameter | Specification |
|---|---|
| Idler Shell Material | 35MnB / 40Mn2 forged steel |
| Surface Hardness | HRC 48–55 |
| Quenching Depth | 6–10 mm |
| Seal System | Floating seal / double cone seal |
| Manufacturing Process | Precision forging, CNC machining, induction hardening |
| Certification | ISO9001, SGS material report |
| Warranty | 12 months / 2,000 hours under normal conditions |
2. OEM & Customization
Send your Kobelco part number or drawing. We match dimensions, mounting holes, and hardness requirements to original OEM specifications.
3. Applicable Models
| Machine Type | Compatible Brands | Popular Series/Models |
|---|---|---|
| Crawler Excavator | Kobelco | SK75UR, SK135SR, SK200-8, SK210LC-8, SK350LC-8, SK480LC |
| Crawler Excavator | Kobelco | SK55SR, SK70SR, SK115SRDZ, SK260LC, SK330LC |
4. Delivery & Logistics
We ship from China with factory-direct pricing, flexible MOQ, and reliable export packaging. Standard lead time is 15–25 days after order confirmation.
Technical Features
The idler assembly uses a floating seal between shaft and roller body, preventing oil leakage and blocking dirt ingress during rotation.
A bimetal bushing supports radial loads and maintains a thin lubrication film, reducing friction heat and extending idler service life.
Forged 35MnB shells undergo induction hardening to create a wear-resistant surface while retaining a ductile core for impact absorption.
Applications
- Mining: Supports tracked excavators on abrasive blasted rock in open-pit operations.
- Road Construction: Handles continuous travel along gravel and asphalt subgrades.
- Quarrying: Withstands sharp stone impact and heavy dust conditions.
- Demolition: Provides stable track tension under high-vibration attachment work.
Frequently Asked Questions
- What is the minimum order quantity for Kobelco idlers?
One piece for stock orders; mixed models acceptable. For OEM production, MOQ may vary by specification. - What is the delivery time?
15–25 days for standard idlers. Custom or large volume orders may require 30–45 days. - How deep is the heat treatment depth?
Surface quenching depth is 6–10 mm depending on idler size and application requirements. - What is the warranty policy?
12 months or 2,000 operating hours under normal load and maintenance conditions. - Can you match original Kobelco part numbers?
Yes, provide your part number or drawing, and we produce direct-fit replacements to OEM dimensions. - Do you provide material certificates?
Yes, SGS or equivalent third-party reports are available with each batch. - What material is used?
Forged 35MnB or 40Mn2 steel after heat treatment.
Maintenance Guide
- Installation: Clean mounting surfaces and inspect shaft bores before installing the idler assembly.
- Track Tension: Maintain correct sag specification; over-tensioning accelerates idler and track wear.
- Inspection: Check for oil leaks, side wear, and abnormal noise every 250 operating hours.
- Replacement: Replace idlers if flange wear exceeds 3 mm or if seal leakage appears.