Dingtai manufactures Komatsu U-yokes as forged structural connectors in track adjuster assemblies, linking the idler wheel to the recoil spring and tension cylinder.
We provide factory-direct supply and comprehensive OEM manufacturing for global distributors, equipment dealers, and undercarriage importers requiring consistent fit and traceability.
Our U-yoke resists bending, cracking, and bore elongation under shock loads, reducing track frame downtime and preventing premature idler misalignment in demanding conditions.
With over 20 years of undercarriage manufacturing experience and ISO9001/SGS-certified processes, Dingtai delivers repeatable quality without procurement risk or marketing ambiguity.
We forge from 35MnB steel and apply deep quenching with CNC-machined pin bores, achieving high surface hardness while retaining core toughness for impact resistance.
Core Selling Points
- Precision Forging/Casting: Die-forged yoke body provides uniform grain flow and higher fatigue strength than cast alternatives, reducing failure under repeated track recoil loads.
- Premium 35MnB Material: 35MnB boron steel delivers an optimal balance of yield strength and ductility, resisting impact fracture in rocky or high-load excavation environments.
- Deep Quenching/Heat Treatment: Critical wear zones are induction hardened to 48–55 HRC with controlled case depth, preventing early bore deformation and surface spalling.
- 100% QC Inspection: Every U-yoke undergoes dimensional verification, hardness testing, and magnetic particle inspection before shipment, ensuring zero-defect delivery for critical undercarriage assemblies.
Our catalog of Komatsu U-Yoke includes various specifications, fully compatible with Komatsu excavators and bulldozers.
Why Choose Dingtai?
Production Technical Parameters
| Parameter | Specification |
|---|---|
| Material | 35MnB boron steel; optional 40Cr or 42CrMo for pins |
| Hardness | Surface 48–55 HRC; core 25–35 HRC |
| Process | Die forging, CNC machining, deep quenching, shot blasting |
| Certification | ISO9001:2015, SGS, material traceability report |
| Warranty | 12 months or 2,000 working hours |
OEM & Customization
We match Komatsu OEM drawings, custom dimensions, and material grades. Strict adherence to undercarriage interchange standards ensures your supplied part number fits first time, every time.
Applicable Models
| Machine Type | Compatible Brands | Popular Series/Models |
|---|---|---|
| Excavator | Komatsu | PC200-7/8, PC220-7/8, PC300-7/8, PC400-7/8 |
| Bulldozer | Komatsu | D65EX-15/16, D85EX-15/16, D155A-5/6 |
Delivery & Logistics
We support flexible MOQ from one sample unit to bulk orders, with reliable FOB/CIF shipping from Quanzhou. Factory-direct pricing reduces total procurement cost.
Technical Features
The U-yoke is die-forged rather than welded, eliminating weak joint zones and ensuring consistent load transfer from the idler to the recoil spring.
Deep quenching produces a hardened wear surface between 48 and 55 HRC, while the tough core absorbs high-frequency impact without brittle fracture.
CNC boring guarantees precise pin bore alignment and roundness, reducing localized stress and preventing premature bushing or pin wear.
Applications
- Open-pit mining and quarrying
- Road construction and earthmoving
- Demolition and heavy civil works
- Forestry and land clearing
- Port and material handling
Frequently Asked Questions
What is the minimum order quantity for Komatsu U-yokes?
One sample unit is accepted for trial. Bulk OEM orders typically start at 50 pieces, depending on the part number and machining complexity.
How long is delivery time?
In-stock standard U-yokes ship within 7 days. Custom forged and machined orders require 20–35 days after drawing approval.
What heat treatment depth do you apply?
Critical load zones receive 8–15 mm effective case depth, with surface hardness controlled at 48–55 HRC to prevent wear and deformation.
Do you offer warranty?
Yes. We provide a 12-month or 2,000-working-hour warranty against manufacturing defects under normal operating conditions.
Can you match Komatsu OEM part numbers?
Yes. Send the OEM part number or drawing. Our engineering team cross-checks dimensions, material, and heat treatment for exact interchange.
What material is used?
The yoke body uses 35MnB boron steel. Pins can be produced in 40Cr or 42CrMo when higher tensile strength is required.
Are your U-yokes compatible with aftermarket undercarriage?
Yes. Our U-yokes are engineered to interchange with Komatsu OEM and major aftermarket track adjuster assemblies without modification.
Do you provide inspection reports?
Each batch includes dimensional reports, hardness data, and material certificates. Third-party SGS inspection is available on request.
Maintenance Guide
- Inspect U-yoke ears and pin bores for cracks, elongation, or deformation every 500 operating hours.
- Check pin locking bolts, retaining hardware, and torque values during scheduled undercarriage service intervals.
- Grease pin journals and bushings to prevent metal-to-metal contact and reduce impact loading on the yoke.
- Replace the U-yoke if bending exceeds OEM tolerance or bore wear exceeds 2 mm from original specification.
- Align idler and track frame before final torque to ensure even load distribution and prevent premature failure.