Maikeyier is a combine harvester parts supplier from China for Kubota, Yanmar, FM World, and Lovol. We produce forged Combine Harvester Idler Wheels ourselves and also have a ductile iron supply chain. We supply harvester parts in multiple materials, processes, quality grades, and prices to agricultural parts dealers, wholesalers, and repair service providers worldwide. Customization and mixed orders are supported. Welcome to contact us for pricing.
Yanmar Idler Wheel
Fmworld Idler Wheel
Lovol Idler Wheel
Kubota Idler Wheel
What Is a Combine Harvester Idler Wheel Assembly?
In the undercarriage system of a tracked harvester, the main running components include the Track Chain, Drive Sprocket, Idler, and Track Roller. The idler wheel assembly is installed on the opposite side of the drive sprocket. It guides the track chain, maintains track tension, controls deviation, and bears a considerable portion of the machine’s weight.
Function
Description
Guide the track chain
Keeps the track running in a straight line, preventing deviation and derailment
Tension the track
Works with the tensioning device to maintain proper track tightness under varying loads
Load bearing
Supports part of the machine’s weight and absorbs ground impact in the field
Maikeyier is a professional factory supplier of harvester and tractor parts. We supply complete machine parts including harvester undercarriage components, supporting mixed orders of machined parts, sheet metal parts, hardware, rubber and plastic parts, hydraulic parts, and engine parts for all models of Kubota, Yanmar, FM World, and Lovol. To date, we have provided one-stop parts supply services to customers in over 20 countries and regions worldwide.
Kubota Yanmar Lovol World Idler Wheel
Idler Wheel Assembly
A complete idler wheel assembly contains 1 core idler wheel + 10 categories of matching parts, totaling 11 items. All parts must be complete to enable immediate installation and use.
English Name
Function
Idler Wheel / Guide Wheel
Core of the assembly; performs guiding and load-bearing
Grease Nipple
Lubrication point
Bearing
Rotational support
Idler Shaft
Shaft core positioning
Idler Bracket / Mount
Fixing and connection
Circlip (Hole Type)
Axial positioning
Nut
Fastening
Oil Seal
Rust prevention and leakage prevention
Flat Washer
Distributes pressure
Washer / Spacer
Sealing / cushioning
Dust Cover
Dust protection
Core Idler Wheel Materials
Maikeyier supplies ductile iron and forged steel harvester idler wheels. You can choose the grade and material. Higher grades offer higher tensile strength and longer service life. For conventional paddy fields and standard operations, ductile iron idler wheels are recommended. For heavy-duty continuous operations, sandy/gravel fields, slopes, and high-impact conditions, forged idler wheels are recommended.
Ductile Iron Idler Wheels
Material Grade
Tensile Strength
Features
Typical Application
QT450-10
≥ 450 MPa
Good toughness; most cost-effective
Standard replacement parts, price-sensitive markets
QT500-7
≥ 500 MPa
Balanced strength and elongation
Mainstream choice for most harvesters
QT600-3
≥ 600 MPa
Highest strength, best wear resistance
Heavy-duty models, long-life configurations
Forged Idler Wheels
Item
Description
Optional materials
45# / 40Cr / 42CrMo
Process route
Cutting → Heating → Pre-forming → Die forging → Trimming and piercing → Straightening → Normalizing/Annealing → Rough machining → Quenching and tempering → Raceway machining → Surface hardening → Finishing → Final inspection
Core advantages
Complete metal flow lines, dense structure, impact resistance, fatigue resistance, not prone to fracture
Q1. What is a combine harvester idler wheel assembly?
It is the guide wheel unit at the front end of the track system, responsible for guiding and tensioning the track chain and bearing part of the machine’s weight. A complete assembly includes the idler wheel, shaft, bearings, oil seals, bracket, and fastening small parts.
Q2. How long does an idler wheel assembly last?
It depends on the material grade and hardening process. Through hardening provides approximately 500-600 working hours longer life than high-frequency hardening – a significant life increase for a very small cost difference.
Q3. How to choose between QT450-10, QT500-7, and QT600-3?
QT450-10 is economical; QT500-7 is the mainstream balanced choice; QT600-3 is the high-end long-life choice for heavy-duty models and muddy paddy field conditions.
Q4. What is the difference between C, B, and A quality grades?
C is economical (QT450-10 + high-frequency hardening), B is standard (QT500-7 + through hardening), A is premium (QT600-3 + through hardening + enhanced surface treatment). Dimensions and inspection standards are fully identical across all three grades.
Q5. Do you supply idler wheel assemblies for Kubota or Yanmar harvesters?
Yes. We support matching by model, OEM number, or photo for major tracked harvester brands such as Kubota, Yanmar, Lovol, and World.
Q6. Can idler wheel assemblies be ordered together with other undercarriage parts?
Yes. Idler wheels, track rollers, drive sprockets, track chains, track shoes, and other harvester parts support mixed orders and can be shipped in one container.
Q7. What is the export packaging like?
Ton bags or iron frame packaging, both meeting sea freight and container stacking requirements, with anti-rust and moisture-proof treatment.
Q8. What information is needed for a quotation?
Harvester brand and model, OEM/reference part number, wheel body dimensions, bore dimensions, material grade, hardening process, quality grade, and order quantity – or simply a clear photo of the old part.
Send your harvester model, OEM part number, or photo of the old Combine Harvester Idler Wheel Assembly to Maikeyier’s email, and you will receive a quotation with grade options within 24 hours. Standard replacement parts, OEM-equivalent parts, and mixed undercarriage orders are all available.
